Bug 1569090 - Update audioipc to 177ebd96. r=chunmin

Differential Revision: https://phabricator.services.mozilla.com/D39453

--HG--
rename : media/audioipc/audioipc/src/async.rs => media/audioipc/audioipc/src/async_msg.rs
extra : moz-landing-system : lando

.cargo/config.in

@@ -32,5 +32,15 @@ git = "https://github.com/ChunMinChang/coreaudio-sys"
 branch = "gecko-build"
 replace-with = "vendored-sources"
 
+[source."https://github.com/alexcrichton/mio-named-pipes"]
+git = "https://github.com/alexcrichton/mio-named-pipes"
+rev = "2072ae0de5b3632dbb065fcd9c8be6c6a2fc39ae"
+replace-with = "vendored-sources"
+
+[source."https://github.com/NikVolf/tokio-named-pipes"]
+git = "https://github.com/NikVolf/tokio-named-pipes"
+rev = "0afa6247222a7aa6e8b370e949a0f4007f0018b6"
+replace-with = "vendored-sources"
+
 [source.vendored-sources]
 directory = '@top_srcdir@/third_party/rust'

media/audioipc/Cargo.toml

@@ -1,2 +1,3 @@
 [workspace]
 members = ["audioipc", "client", "server"]
+

media/audioipc/README_MOZILLA

@@ -5,4 +5,4 @@ Makefile.in build files for the Mozilla build system.
 
 The audioipc-2 git repository is: https://github.com/djg/audioipc-2.git
 
-The git commit ID used was 1c6e33942d726d71cb911fb8f57138aadf577057 (2019-07-23 15:56:25 +1200)
+The git commit ID used was 959be8b71bd8d931a9e94276dde1dd718f52fca4 (2019-07-26 16:40:02 +1200)

media/audioipc/audioipc/Cargo.toml

@@ -6,24 +6,32 @@ authors = [
         "Dan Glastonbury <dan.glastonbury@gmail.com>"
         ]
 description = "Remote Cubeb IPC"
+edition = "2018"
 
 [dependencies]
-cubeb = "0.5.4"
 bincode = "1.0"
 bytes = "0.4"
+cubeb = "0.5.5"
 futures = "0.1.18"
-iovec = "0.1"
-libc = "0.2"
 log = "0.4"
-memmap = "0.5.2"
+memmap = "0.7"
 scoped-tls = "0.1"
 serde = "1.*.*"
 serde_derive = "1.*.*"
-tokio-core = "0.1"
+tokio = "0.1"
 tokio-io = "0.1"
-tokio-uds = "0.1.7"
+
+[target.'cfg(unix)'.dependencies]
+iovec = "0.1"
+libc = "0.2"
+mio = "0.6.19"
+mio-uds = "0.6.7"
+tokio-reactor = "0.1"
+
+[target.'cfg(windows)'.dependencies]
+mio-named-pipes = { git = "https://github.com/alexcrichton/mio-named-pipes" }
+tokio-named-pipes = { git = "https://github.com/NikVolf/tokio-named-pipes", branch = "stable" }
 winapi = "0.3.6"
-mio-named-pipes = "=0.1.5"
 
 [dependencies.error-chain]
 version = "0.11.0"

media/audioipc/audioipc/src/async_msg.rs

@@ -5,6 +5,8 @@
 
 //! Various async helpers modelled after futures-rs and tokio-io.
 
+#[cfg(unix)]
+use crate::msg::{RecvMsg, SendMsg};
 use bytes::{Buf, BufMut};
 #[cfg(unix)]
 use futures::Async;
@@ -12,7 +14,7 @@ use futures::Poll;
 #[cfg(unix)]
 use iovec::IoVec;
 #[cfg(unix)]
-use msg::{RecvMsg, SendMsg};
+use mio::Ready;
 use std::io;
 use tokio_io::{AsyncRead, AsyncWrite};
 
@@ -63,7 +65,9 @@ impl AsyncRecvMsg for super::AsyncMessageStream {
     where
         B: BufMut,
     {
-        if let Async::NotReady = <super::AsyncMessageStream>::poll_read(self) {
+        if let Async::NotReady =
+            <super::AsyncMessageStream>::poll_read_ready(self, Ready::readable())?
+        {
             return Ok(Async::NotReady);
         }
         let r = unsafe {
@@ -119,7 +123,7 @@ impl AsyncRecvMsg for super::AsyncMessageStream {
                 Ok((n, flags).into())
             }
             Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
-                self.need_read();
+                self.clear_read_ready(mio::Ready::readable())?;
                 Ok(Async::NotReady)
             }
             Err(e) => Err(e),
@@ -134,7 +138,7 @@ impl AsyncSendMsg for super::AsyncMessageStream {
         B: Buf,
         C: Buf,
     {
-        if let Async::NotReady = <super::AsyncMessageStream>::poll_write(self) {
+        if let Async::NotReady = <super::AsyncMessageStream>::poll_write_ready(self)? {
             return Ok(Async::NotReady);
         }
         let r = {
@@ -155,7 +159,7 @@ impl AsyncSendMsg for super::AsyncMessageStream {
                 Ok(Async::Ready(n))
             }
             Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
-                self.need_write();
+                self.clear_write_ready()?;
                 Ok(Async::NotReady)
             }
             Err(e) => Err(e),

media/audioipc/audioipc/src/cmsg.rs

@@ -111,6 +111,7 @@ impl ControlMsgBuilder {
             // that, just use a pre-zeroed struct to fill out any
             // fields we don't care about.
             let zeroed = unsafe { mem::zeroed() };
+            #[allow(clippy::needless_update)]
             let cmsghdr = cmsghdr {
                 cmsg_len: cmsg_len as _,
                 cmsg_level: level,
@@ -122,7 +123,7 @@ impl ControlMsgBuilder {
                 slice::from_raw_parts(&cmsghdr as *const _ as *const _, mem::size_of::<cmsghdr>())
             };
             cmsg.put_slice(cmsghdr);
-            let mut cmsg = try!(align_buf(cmsg));
+            let mut cmsg = align_buf(cmsg)?;
             cmsg.put_slice(msg);
 
             Ok(cmsg)

media/audioipc/audioipc/src/codec.rs

@@ -31,7 +31,7 @@ pub trait Codec {
     /// A default method available to be called when there are no more bytes
     /// available to be read from the I/O.
     fn decode_eof(&mut self, buf: &mut BytesMut) -> io::Result<Self::Out> {
-        match try!(self.decode(buf)) {
+        match self.decode(buf)? {
             Some(frame) => Ok(frame),
             None => Err(io::Error::new(
                 io::ErrorKind::Other,
@@ -101,10 +101,10 @@ impl<In, Out> LengthDelimitedCodec<In, Out> {
         let buf = buf.split_to(n).freeze();
 
         trace!("Attempting to decode");
-        let msg = try!(deserialize::<Out>(buf.as_ref()).map_err(|e| match *e {
+        let msg = deserialize::<Out>(buf.as_ref()).map_err(|e| match *e {
             bincode::ErrorKind::Io(e) => e,
             _ => io::Error::new(io::ErrorKind::Other, *e),
-        }));
+        })?;
 
         trace!("... Decoded {:?}", msg);
         Ok(Some(msg))
@@ -122,7 +122,7 @@ where
     fn decode(&mut self, buf: &mut BytesMut) -> io::Result<Option<Self::Out>> {
         let n = match self.state {
             State::Length => {
-                match try!(self.decode_length(buf)) {
+                match self.decode_length(buf)? {
                     Some(n) => {
                         self.state = State::Data(n);
 
@@ -138,7 +138,7 @@ where
             State::Data(n) => n,
         };
 
-        match try!(self.decode_data(buf, n)) {
+        match self.decode_data(buf, n)? {
             Some(data) => {
                 // Update the decode state
                 self.state = State::Length;

media/audioipc/audioipc/src/core.rs

@@ -6,33 +6,9 @@
 // Ease accessing reactor::Core handles.
 
 use futures::sync::oneshot;
-use futures::{Future, IntoFuture};
 use std::sync::mpsc;
 use std::{fmt, io, thread};
-use tokio_core::reactor::{Core, Handle, Remote};
-
-scoped_thread_local! {
-    static HANDLE: Handle
-}
-
-pub fn handle() -> Handle {
-    HANDLE.with(|handle| handle.clone())
-}
-
-pub fn spawn<F>(f: F)
-where
-    F: Future<Item = (), Error = ()> + 'static,
-{
-    HANDLE.with(|handle| handle.spawn(f))
-}
-
-pub fn spawn_fn<F, R>(f: F)
-where
-    F: FnOnce() -> R + 'static,
-    R: IntoFuture<Item = (), Error = ()> + 'static,
-{
-    HANDLE.with(|handle| handle.spawn_fn(f))
-}
+use tokio::runtime::current_thread;
 
 struct Inner {
     join: thread::JoinHandle<()>,
@@ -41,12 +17,12 @@ struct Inner {
 
 pub struct CoreThread {
     inner: Option<Inner>,
-    remote: Remote,
+    handle: current_thread::Handle,
 }
 
 impl CoreThread {
-    pub fn remote(&self) -> Remote {
-        self.remote.clone()
+    pub fn handle(&self) -> current_thread::Handle {
+        self.handle.clone()
     }
 }
 
@@ -61,9 +37,9 @@ impl Drop for CoreThread {
 }
 
 impl fmt::Debug for CoreThread {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // f.debug_tuple("CoreThread").field(&"...").finish()
-        f.debug_tuple("CoreThread").field(&self.remote).finish()
+        f.debug_tuple("CoreThread").field(&self.handle).finish()
     }
 }
 
@@ -73,33 +49,35 @@ where
     F: FnOnce() -> io::Result<()> + Send + 'static,
 {
     let (shutdown_tx, shutdown_rx) = oneshot::channel::<()>();
-    let (remote_tx, remote_rx) = mpsc::channel::<Remote>();
+    let (handle_tx, handle_rx) = mpsc::channel::<current_thread::Handle>();
 
-    let join = try!(thread::Builder::new().name(name.into()).spawn(move || {
-        let mut core = Core::new().expect("Failed to create reactor::Core");
-        let handle = core.handle();
-        let remote = handle.remote().clone();
-        drop(remote_tx.send(remote));
+    let join = thread::Builder::new().name(name.into()).spawn(move || {
+        let mut rt =
+            current_thread::Runtime::new().expect("Failed to create current_thread::Runtime");
+        let handle = rt.handle();
+        drop(handle_tx.send(handle.clone()));
 
-        drop(HANDLE.set(&handle, || {
-            f().and_then(|_| {
-                let _ = core.run(shutdown_rx);
-                Ok(())
-            })
+        rt.spawn(futures::future::lazy(|| {
+            let _ = f();
+            Ok(())
         }));
-        trace!("thread shutdown...");
-    }));
 
-    let remote = try!(remote_rx.recv().or_else(|_| Err(io::Error::new(
-        io::ErrorKind::Other,
-        "Failed to receive remote handle from spawned thread"
-    ))));
+        let _ = rt.block_on(shutdown_rx);
+        trace!("thread shutdown...");
+    })?;
+
+    let handle = handle_rx.recv().or_else(|_| {
+        Err(io::Error::new(
+            io::ErrorKind::Other,
+            "Failed to receive remote handle from spawned thread",
+        ))
+    })?;
 
     Ok(CoreThread {
         inner: Some(Inner {
-            join: join,
+            join,
             shutdown: shutdown_tx,
         }),
-        remote: remote,
+        handle,
     })
 }

media/audioipc/audioipc/src/fd_passing.rs

@@ -3,12 +3,12 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-use async::{AsyncRecvMsg, AsyncSendMsg};
+use crate::async_msg::{AsyncRecvMsg, AsyncSendMsg};
+use crate::cmsg;
+use crate::codec::Codec;
+use crate::messages::AssocRawPlatformHandle;
 use bytes::{Bytes, BytesMut, IntoBuf};
-use cmsg;
-use codec::Codec;
 use futures::{AsyncSink, Poll, Sink, StartSend, Stream};
-use messages::AssocRawPlatformHandle;
 use std::collections::VecDeque;
 use std::os::unix::io::RawFd;
 use std::{fmt, io, mem};
@@ -103,7 +103,8 @@ where
                     let fds = match frame.fds {
                         Some(ref fds) => fds.clone(),
                         None => Bytes::new(),
-                    }.into_buf();
+                    }
+                    .into_buf();
                     try_ready!(self.io.send_msg_buf(&mut msgs, &fds))
                 }
                 _ => {
@@ -179,14 +180,14 @@ where
             // readable again, at which point the stream is terminated.
             if self.is_readable {
                 if self.eof {
-                    let mut item = try!(self.codec.decode_eof(&mut self.read_buf));
+                    let mut item = self.codec.decode_eof(&mut self.read_buf)?;
                     item.take_platform_handles(|| self.incoming_fds.take_fds());
                     return Ok(Some(item).into());
                 }
 
                 trace!("attempting to decode a frame");
 
-                if let Some(mut item) = try!(self.codec.decode(&mut self.read_buf)) {
+                if let Some(mut item) = self.codec.decode(&mut self.read_buf)? {
                     trace!("frame decoded from buffer");
                     item.take_platform_handles(|| self.incoming_fds.take_fds());
                     return Ok(Some(item).into());
@@ -200,10 +201,9 @@ where
             // Otherwise, try to read more data and try again. Make sure we've
             // got room for at least one byte to read to ensure that we don't
             // get a spurious 0 that looks like EOF
-            let (n, _) = try_ready!(
-                self.io
-                    .recv_msg_buf(&mut self.read_buf, self.incoming_fds.cmsg())
-            );
+            let (n, _) = try_ready!(self
+                .io
+                .recv_msg_buf(&mut self.read_buf, self.incoming_fds.cmsg()));
 
             if n == 0 {
                 self.eof = true;
@@ -230,14 +230,14 @@ where
         // then attempt to flush it. If after flush it's *still*
         // over BACKPRESSURE_THRESHOLD, then reject the send.
         if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
-            try!(self.poll_complete());
+            self.poll_complete()?;
             if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
                 return Ok(AsyncSink::NotReady(item));
             }
         }
 
         let fds = item.platform_handles();
-        try!(self.codec.encode(item, &mut self.write_buf));
+        self.codec.encode(item, &mut self.write_buf)?;
         let fds = fds.and_then(|fds| {
             cmsg::builder(&mut self.outgoing_fds)
                 .rights(&fds.0[..])
@@ -275,8 +275,8 @@ where
 
 pub fn framed_with_platformhandles<A, C>(io: A, codec: C) -> FramedWithPlatformHandles<A, C> {
     FramedWithPlatformHandles {
-        io: io,
-        codec: codec,
+        io,
+        codec,
         read_buf: BytesMut::with_capacity(INITIAL_CAPACITY),
         incoming_fds: IncomingFds::new(FDS_CAPACITY),
         is_readable: false,
@@ -313,8 +313,8 @@ mod tests {
     use libc;
     use std;
 
-    extern {
-        fn cmsghdr_bytes(size: *mut libc::size_t) -> *const libc::uint8_t;
+    extern "C" {
+        fn cmsghdr_bytes(size: *mut libc::size_t) -> *const u8;
     }
 
     fn cmsg_bytes() -> &'static [u8] {

media/audioipc/audioipc/src/frame.rs

@@ -3,8 +3,8 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
+use crate::codec::Codec;
 use bytes::{Buf, Bytes, BytesMut, IntoBuf};
-use codec::Codec;
 use futures::{AsyncSink, Poll, Sink, StartSend, Stream};
 use std::io;
 use tokio_io::{AsyncRead, AsyncWrite};
@@ -79,13 +79,13 @@ where
             // readable again, at which point the stream is terminated.
             if self.is_readable {
                 if self.eof {
-                    let frame = try!(self.codec.decode_eof(&mut self.read_buf));
+                    let frame = self.codec.decode_eof(&mut self.read_buf)?;
                     return Ok(Some(frame).into());
                 }
 
                 trace!("attempting to decode a frame");
 
-                if let Some(frame) = try!(self.codec.decode(&mut self.read_buf)) {
+                if let Some(frame) = self.codec.decode(&mut self.read_buf)? {
                     trace!("frame decoded from buffer");
                     return Ok(Some(frame).into());
                 }
@@ -120,13 +120,13 @@ where
         // then attempt to flush it. If after flush it's *still*
         // over BACKPRESSURE_THRESHOLD, then reject the send.
         if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
-            try!(self.poll_complete());
+            self.poll_complete()?;
             if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
                 return Ok(AsyncSink::NotReady(item));
             }
         }
 
-        try!(self.codec.encode(item, &mut self.write_buf));
+        self.codec.encode(item, &mut self.write_buf)?;
         Ok(AsyncSink::Ready)
     }
 
@@ -149,8 +149,8 @@ where
 
 pub fn framed<A, C>(io: A, codec: C) -> Framed<A, C> {
     Framed {
-        io: io,
-        codec: codec,
+        io,
+        codec,
         read_buf: BytesMut::with_capacity(INITIAL_CAPACITY),
         write_buf: BytesMut::with_capacity(INITIAL_CAPACITY),
         frame: None,

media/audioipc/audioipc/src/handle_passing.rs

@@ -3,13 +3,13 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-use tokio_io::{AsyncRead, AsyncWrite};
+use crate::codec::Codec;
+use crate::messages::AssocRawPlatformHandle;
 use bytes::{Bytes, BytesMut, IntoBuf};
-use codec::Codec;
 use futures::{AsyncSink, Poll, Sink, StartSend, Stream};
-use messages::AssocRawPlatformHandle;
 use std::collections::VecDeque;
 use std::{fmt, io};
+use tokio_io::{AsyncRead, AsyncWrite};
 
 const INITIAL_CAPACITY: usize = 1024;
 const BACKPRESSURE_THRESHOLD: usize = 4 * INITIAL_CAPACITY;
@@ -117,13 +117,13 @@ where
             // readable again, at which point the stream is terminated.
             if self.is_readable {
                 if self.eof {
-                    let item = try!(self.codec.decode_eof(&mut self.read_buf));
+                    let item = self.codec.decode_eof(&mut self.read_buf)?;
                     return Ok(Some(item).into());
                 }
 
                 trace!("attempting to decode a frame");
 
-                if let Some(item) = try!(self.codec.decode(&mut self.read_buf)) {
+                if let Some(item) = self.codec.decode(&mut self.read_buf)? {
                     trace!("frame decoded from buffer");
                     return Ok(Some(item).into());
                 }
@@ -136,10 +136,7 @@ where
             // Otherwise, try to read more data and try again. Make sure we've
             // got room for at least one byte to read to ensure that we don't
             // get a spurious 0 that looks like EOF
-            let n = try_ready!(
-                self.io
-                    .read_buf(&mut self.read_buf)
-            );
+            let n = try_ready!(self.io.read_buf(&mut self.read_buf));
 
             if n == 0 {
                 self.eof = true;
@@ -159,14 +156,17 @@ where
     type SinkItem = C::In;
     type SinkError = io::Error;
 
-    fn start_send(&mut self, mut item: Self::SinkItem) -> StartSend<Self::SinkItem, Self::SinkError> {
+    fn start_send(
+        &mut self,
+        mut item: Self::SinkItem,
+    ) -> StartSend<Self::SinkItem, Self::SinkError> {
         trace!("start_send: item={:?}", item);
 
         // If the buffer is already over BACKPRESSURE_THRESHOLD,
         // then attempt to flush it. If after flush it's *still*
         // over BACKPRESSURE_THRESHOLD, then reject the send.
         if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
-            try!(self.poll_complete());
+            self.poll_complete()?;
             if self.write_buf.len() > BACKPRESSURE_THRESHOLD {
                 return Ok(AsyncSink::NotReady(item));
             }
@@ -176,15 +176,21 @@ where
         if let Some((handles, target_pid)) = item.platform_handles() {
             got_handles = true;
             let remote_handles = unsafe {
-                [duplicate_platformhandle(handles[0], target_pid)?,
-                 duplicate_platformhandle(handles[1], target_pid)?,
-                 duplicate_platformhandle(handles[2], target_pid)?]
+                [
+                    duplicate_platformhandle(handles[0], target_pid)?,
+                    duplicate_platformhandle(handles[1], target_pid)?,
+                    duplicate_platformhandle(handles[2], target_pid)?,
+                ]
             };
-            trace!("item handles: {:?} remote_handles: {:?}", handles, remote_handles);
+            trace!(
+                "item handles: {:?} remote_handles: {:?}",
+                handles,
+                remote_handles
+            );
             item.take_platform_handles(|| Some(remote_handles));
         }
 
-        try!(self.codec.encode(item, &mut self.write_buf));
+        self.codec.encode(item, &mut self.write_buf)?;
 
         if got_handles {
             // Enforce splitting sends on messages that contain file
@@ -214,8 +220,8 @@ where
 
 pub fn framed_with_platformhandles<A, C>(io: A, codec: C) -> FramedWithPlatformHandles<A, C> {
     FramedWithPlatformHandles {
-        io: io,
-        codec: codec,
+        io,
+        codec,
         read_buf: BytesMut::with_capacity(INITIAL_CAPACITY),
         is_readable: false,
         eof: false,
@@ -224,33 +230,41 @@ pub fn framed_with_platformhandles<A, C>(io: A, codec: C) -> FramedWithPlatformH
     }
 }
 
-use winapi::um::{processthreadsapi, winnt, handleapi};
-use winapi::shared::minwindef::{DWORD, FALSE};
 use super::PlatformHandleType;
+use winapi::shared::minwindef::{DWORD, FALSE};
+use winapi::um::{handleapi, processthreadsapi, winnt};
 
 // source_handle is effectively taken ownership of (consumed) and
 // closed when duplicate_platformhandle is called.
 // TODO: Make this transfer more explicit via the type system.
-unsafe fn duplicate_platformhandle(source_handle: PlatformHandleType,
-                                   target_pid: DWORD) -> Result<PlatformHandleType, std::io::Error> {
+unsafe fn duplicate_platformhandle(
+    source_handle: PlatformHandleType,
+    target_pid: DWORD,
+) -> Result<PlatformHandleType, std::io::Error> {
     let source = processthreadsapi::GetCurrentProcess();
-    let target = processthreadsapi::OpenProcess(winnt::PROCESS_DUP_HANDLE,
-                                                FALSE,
-                                                target_pid);
+    let target = processthreadsapi::OpenProcess(winnt::PROCESS_DUP_HANDLE, FALSE, target_pid);
     if !super::valid_handle(target) {
-        return Err(std::io::Error::new(std::io::ErrorKind::Other, "invalid target process"));
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
+            "invalid target process",
+        ));
     }
 
     let mut target_handle = std::ptr::null_mut();
-    let ok = handleapi::DuplicateHandle(source,
-                                        source_handle,
-                                        target,
-                                        &mut target_handle,
-                                        0,
-                                        FALSE,
-                                        winnt::DUPLICATE_CLOSE_SOURCE | winnt::DUPLICATE_SAME_ACCESS);
+    let ok = handleapi::DuplicateHandle(
+        source,
+        source_handle,
+        target,
+        &mut target_handle,
+        0,
+        FALSE,
+        winnt::DUPLICATE_CLOSE_SOURCE | winnt::DUPLICATE_SAME_ACCESS,
+    );
     if ok == FALSE {
-        return Err(std::io::Error::new(std::io::ErrorKind::Other, "DuplicateHandle failed"));
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
+            "DuplicateHandle failed",
+        ));
     }
     Ok(target_handle)
 }

media/audioipc/audioipc/src/lib.rs

@@ -2,36 +2,20 @@
 //
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
-
+#![warn(unused_extern_crates)]
 #![recursion_limit = "1024"]
 #[macro_use]
 extern crate error_chain;
-
 #[macro_use]
 extern crate log;
-
 #[macro_use]
 extern crate serde_derive;
-
-extern crate bincode;
-extern crate bytes;
-extern crate cubeb;
 #[macro_use]
 extern crate futures;
-extern crate iovec;
-extern crate libc;
-extern crate memmap;
-#[macro_use]
-extern crate scoped_tls;
-extern crate serde;
-extern crate tokio_core;
 #[macro_use]
 extern crate tokio_io;
-extern crate tokio_uds;
-#[cfg(windows)]
-extern crate winapi;
 
-mod async;
+mod async_msg;
 #[cfg(unix)]
 mod cmsg;
 pub mod codec;
@@ -41,7 +25,7 @@ pub mod errors;
 #[cfg(unix)]
 pub mod fd_passing;
 #[cfg(unix)]
-pub use fd_passing as platformhandle_passing;
+pub use crate::fd_passing as platformhandle_passing;
 #[cfg(windows)]
 pub mod handle_passing;
 #[cfg(windows)]
@@ -53,14 +37,21 @@ mod msg;
 pub mod rpc;
 pub mod shm;
 
-pub use messages::{ClientMessage, ServerMessage};
+// TODO: Remove local fork when https://github.com/tokio-rs/tokio/pull/1294 is resolved.
+#[cfg(unix)]
+mod tokio_uds_stream;
+
+pub use crate::messages::{ClientMessage, ServerMessage};
 use std::env::temp_dir;
 use std::path::PathBuf;
 
-#[cfg(windows)]
-use std::os::windows::io::{FromRawHandle, IntoRawHandle};
+// TODO: Remove hardcoded size and allow allocation based on cubeb backend requirements.
+pub const SHM_AREA_SIZE: usize = 2 * 1024 * 1024;
+
 #[cfg(unix)]
 use std::os::unix::io::{FromRawFd, IntoRawFd};
+#[cfg(windows)]
+use std::os::windows::io::{FromRawHandle, IntoRawHandle};
 
 // This must match the definition of
 // ipc::FileDescriptor::PlatformHandleType in Gecko.
@@ -93,7 +84,7 @@ struct PlatformHandleVisitor;
 impl<'de> serde::de::Visitor<'de> for PlatformHandleVisitor {
     type Value = PlatformHandle;
 
-    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         formatter.write_str("an integer between -2^63 and 2^63")
     }
 
@@ -158,7 +149,7 @@ impl PlatformHandle {
         std::fs::File::from_raw_fd(self.0)
     }
 
-    pub fn as_raw(&self) -> PlatformHandleType {
+    pub fn as_raw(self) -> PlatformHandleType {
         self.0
     }
 
@@ -187,11 +178,9 @@ pub fn get_shm_path(dir: &str) -> PathBuf {
 #[cfg(unix)]
 pub mod messagestream_unix;
 #[cfg(unix)]
-pub use messagestream_unix::*;
+pub use crate::messagestream_unix::*;
 
 #[cfg(windows)]
 pub mod messagestream_win;
 #[cfg(windows)]
 pub use messagestream_win::*;
-#[cfg(windows)]
-mod tokio_named_pipes;

media/audioipc/audioipc/src/messages.rs

@@ -3,8 +3,8 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-use PlatformHandle;
-use PlatformHandleType;
+use crate::PlatformHandle;
+use crate::PlatformHandleType;
 use cubeb::{self, ffi};
 use std::ffi::{CStr, CString};
 use std::os::raw::{c_char, c_int, c_uint};
@@ -174,6 +174,12 @@ pub struct StreamCreate {
     pub target_pid: u32,
 }
 
+#[derive(Debug, Serialize, Deserialize)]
+pub struct RegisterDeviceCollectionChanged {
+    pub platform_handles: [PlatformHandle; 3],
+    pub target_pid: u32,
+}
+
 // Client -> Server messages.
 // TODO: Callbacks should be different messages types so
 // ServerConn::process_msg doesn't have a catch-all case.
@@ -187,6 +193,8 @@ pub enum ServerMessage {
     ContextGetMinLatency(StreamParams),
     ContextGetPreferredSampleRate,
     ContextGetDeviceEnumeration(ffi::cubeb_device_type),
+    ContextSetupDeviceCollectionCallback,
+    ContextRegisterDeviceCollectionChanged(ffi::cubeb_device_type, bool),
 
     StreamInit(StreamInitParams),
     StreamDestroy(usize),
@@ -199,6 +207,7 @@ pub enum ServerMessage {
     StreamSetVolume(usize, f32),
     StreamSetPanning(usize, f32),
     StreamGetCurrentDevice(usize),
+    StreamRegisterDeviceChangeCallback(usize, bool),
 }
 
 // Server -> Client messages.
@@ -208,11 +217,13 @@ pub enum ClientMessage {
     ClientConnected,
     ClientDisconnected,
 
-    ContextBackendId(),
+    ContextBackendId(String),
     ContextMaxChannelCount(u32),
     ContextMinLatency(u32),
     ContextPreferredSampleRate(u32),
     ContextEnumeratedDevices(Vec<DeviceInfo>),
+    ContextSetupDeviceCollectionCallback(RegisterDeviceCollectionChanged),
+    ContextRegisteredDeviceCollectionChanged,
 
     StreamCreated(StreamCreate),
     StreamDestroyed,
@@ -225,22 +236,37 @@ pub enum ClientMessage {
     StreamVolumeSet,
     StreamPanningSet,
     StreamCurrentDevice(Device),
+    StreamRegisterDeviceChangeCallback,
 
     Error(c_int),
 }
 
 #[derive(Debug, Deserialize, Serialize)]
 pub enum CallbackReq {
-    Data { nframes: isize,
-           input_frame_size: usize,
-           output_frame_size: usize },
+    Data {
+        nframes: isize,
+        input_frame_size: usize,
+        output_frame_size: usize,
+    },
     State(ffi::cubeb_state),
+    DeviceChange,
 }
 
 #[derive(Debug, Deserialize, Serialize)]
 pub enum CallbackResp {
     Data(isize),
     State,
+    DeviceChange,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub enum DeviceCollectionReq {
+    DeviceChange(ffi::cubeb_device_type),
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub enum DeviceCollectionResp {
+    DeviceChange,
 }
 
 pub trait AssocRawPlatformHandle {
@@ -250,7 +276,8 @@ pub trait AssocRawPlatformHandle {
 
     fn take_platform_handles<F>(&mut self, f: F)
     where
-        F: FnOnce() -> Option<[PlatformHandleType; 3]> {
+        F: FnOnce() -> Option<[PlatformHandleType; 3]>,
+    {
         assert!(f().is_none());
     }
 }
@@ -260,10 +287,22 @@ impl AssocRawPlatformHandle for ServerMessage {}
 impl AssocRawPlatformHandle for ClientMessage {
     fn platform_handles(&self) -> Option<([PlatformHandleType; 3], u32)> {
         match *self {
-            ClientMessage::StreamCreated(ref data) => Some(([data.platform_handles[0].as_raw(),
-                                                             data.platform_handles[1].as_raw(),
-                                                             data.platform_handles[2].as_raw()],
-                                                            data.target_pid)),
+            ClientMessage::StreamCreated(ref data) => Some((
+                [
+                    data.platform_handles[0].as_raw(),
+                    data.platform_handles[1].as_raw(),
+                    data.platform_handles[2].as_raw(),
+                ],
+                data.target_pid,
+            )),
+            ClientMessage::ContextSetupDeviceCollectionCallback(ref data) => Some((
+                [
+                    data.platform_handles[0].as_raw(),
+                    data.platform_handles[1].as_raw(),
+                    data.platform_handles[2].as_raw(),
+                ],
+                data.target_pid,
+            )),
             _ => None,
         }
     }
@@ -272,11 +311,25 @@ impl AssocRawPlatformHandle for ClientMessage {
     where
         F: FnOnce() -> Option<[PlatformHandleType; 3]>,
     {
-        if let ClientMessage::StreamCreated(ref mut data) = *self {
-            let handles = f().expect("platform_handles must be available when processing StreamCreated");
-            data.platform_handles = [PlatformHandle::new(handles[0]),
-                                     PlatformHandle::new(handles[1]),
-                                     PlatformHandle::new(handles[2])]
+        match *self {
+            ClientMessage::StreamCreated(ref mut data) => {
+                let handles =
+                    f().expect("platform_handles must be available when processing StreamCreated");
+                data.platform_handles = [
+                    PlatformHandle::new(handles[0]),
+                    PlatformHandle::new(handles[1]),
+                    PlatformHandle::new(handles[2]),
+                ]
+            }
+            ClientMessage::ContextSetupDeviceCollectionCallback(ref mut data) => {
+                let handles = f().expect("platform_handles must be available when processing ContextSetupDeviceCollectionCallback");
+                data.platform_handles = [
+                    PlatformHandle::new(handles[0]),
+                    PlatformHandle::new(handles[1]),
+                    PlatformHandle::new(handles[2]),
+                ]
+            }
+            _ => {}
         }
     }
 }

media/audioipc/audioipc/src/messagestream_unix.rs

@@ -3,7 +3,10 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-use std::os::unix::io::{IntoRawFd, FromRawFd, AsRawFd, RawFd};
+use super::tokio_uds_stream as tokio_uds;
+use futures::Poll;
+use mio::Ready;
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
 use std::os::unix::net;
 use tokio_io::{AsyncRead, AsyncWrite};
 
@@ -16,7 +19,8 @@ impl MessageStream {
         MessageStream(stream)
     }
 
-    pub fn anonymous_ipc_pair() -> std::result::Result<(MessageStream, MessageStream), std::io::Error> {
+    pub fn anonymous_ipc_pair(
+    ) -> std::result::Result<(MessageStream, MessageStream), std::io::Error> {
         let pair = net::UnixStream::pair()?;
         Ok((MessageStream::new(pair.0), MessageStream::new(pair.1)))
     }
@@ -25,8 +29,13 @@ impl MessageStream {
         MessageStream::new(net::UnixStream::from_raw_fd(raw))
     }
 
-    pub fn into_tokio_ipc(self, handle: &tokio_core::reactor::Handle) -> std::result::Result<AsyncMessageStream, std::io::Error> {
-        Ok(AsyncMessageStream::new(tokio_uds::UnixStream::from_stream(self.0, handle)?))
+    pub fn into_tokio_ipc(
+        self,
+        handle: &tokio::reactor::Handle,
+    ) -> std::result::Result<AsyncMessageStream, std::io::Error> {
+        Ok(AsyncMessageStream::new(tokio_uds::UnixStream::from_std(
+            self.0, handle,
+        )?))
     }
 }
 
@@ -35,20 +44,20 @@ impl AsyncMessageStream {
         AsyncMessageStream(stream)
     }
 
-    pub fn poll_read(&self) -> futures::Async<()> {
-        self.0.poll_read()
+    pub fn poll_read_ready(&self, ready: Ready) -> Poll<Ready, std::io::Error> {
+        self.0.poll_read_ready(ready)
     }
 
-    pub fn poll_write(&self) -> futures::Async<()> {
-        self.0.poll_write()
+    pub fn clear_read_ready(&self, ready: Ready) -> Result<(), std::io::Error> {
+        self.0.clear_read_ready(ready)
     }
 
-    pub fn need_read(&self) {
-        self.0.need_read()
+    pub fn poll_write_ready(&self) -> Poll<Ready, std::io::Error> {
+        self.0.poll_write_ready()
     }
 
-    pub fn need_write(&self) {
-        self.0.need_write()
+    pub fn clear_write_ready(&self) -> Result<(), std::io::Error> {
+        self.0.clear_write_ready()
     }
 }
 

media/audioipc/audioipc/src/messagestream_win.rs

@@ -3,8 +3,8 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-extern crate mio_named_pipes;
-use std::os::windows::io::{IntoRawHandle, FromRawHandle, AsRawHandle, RawHandle};
+use mio_named_pipes;
+use std::os::windows::io::{AsRawHandle, FromRawHandle, IntoRawHandle, RawHandle};
 use std::sync::atomic::{AtomicUsize, Ordering};
 use tokio_io::{AsyncRead, AsyncWrite};
 use tokio_named_pipes;
@@ -18,8 +18,8 @@ impl MessageStream {
         MessageStream(stream)
     }
 
-
-    pub fn anonymous_ipc_pair() -> std::result::Result<(MessageStream, MessageStream), std::io::Error> {
+    pub fn anonymous_ipc_pair(
+    ) -> std::result::Result<(MessageStream, MessageStream), std::io::Error> {
         let pipe1 = mio_named_pipes::NamedPipe::new(get_pipe_name())?;
         let pipe2 = unsafe { mio_named_pipes::NamedPipe::from_raw_handle(pipe1.as_raw_handle()) };
         Ok((MessageStream::new(pipe1), MessageStream::new(pipe2)))
@@ -29,8 +29,13 @@ impl MessageStream {
         MessageStream::new(mio_named_pipes::NamedPipe::from_raw_handle(raw))
     }
 
-    pub fn into_tokio_ipc(self, handle: &tokio_core::reactor::Handle) -> std::result::Result<AsyncMessageStream, std::io::Error> {
-        Ok(AsyncMessageStream::new(tokio_named_pipes::NamedPipe::from_pipe(self.0, handle)?))
+    pub fn into_tokio_ipc(
+        self,
+        handle: &tokio::reactor::Handle,
+    ) -> std::result::Result<AsyncMessageStream, std::io::Error> {
+        Ok(AsyncMessageStream::new(
+            tokio_named_pipes::NamedPipe::from_pipe(self.0, handle)?,
+        ))
     }
 }
 
@@ -38,22 +43,6 @@ impl AsyncMessageStream {
     fn new(stream: tokio_named_pipes::NamedPipe) -> AsyncMessageStream {
         AsyncMessageStream(stream)
     }
-
-    pub fn poll_read(&self) -> futures::Async<()> {
-        self.0.poll_read()
-    }
-
-    pub fn poll_write(&self) -> futures::Async<()> {
-        self.0.poll_write()
-    }
-
-    pub fn need_read(&self) {
-        self.0.need_read()
-    }
-
-    pub fn need_write(&self) {
-        self.0.need_write()
-    }
 }
 
 impl std::io::Read for AsyncMessageStream {

media/audioipc/audioipc/src/msg.rs

@@ -3,7 +3,7 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details.
 
-use iovec::unix as iovec;
+use iovec::unix;
 use iovec::IoVec;
 use libc;
 use std::os::unix::io::{AsRawFd, RawFd};
@@ -68,7 +68,7 @@ pub fn recv_msg_with_flags(
     cmsg: &mut [u8],
     flags: libc::c_int,
 ) -> io::Result<(usize, usize, libc::c_int)> {
-    let slice = iovec::as_os_slice_mut(bufs);
+    let slice = unix::as_os_slice_mut(bufs);
     let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
     let (control, controllen) = if cmsg.is_empty() {
         (ptr::null_mut(), 0)
@@ -84,9 +84,7 @@ pub fn recv_msg_with_flags(
     msghdr.msg_control = control;
     msghdr.msg_controllen = controllen as _;
 
-    let n = try!(cvt_r(|| unsafe {
-        libc::recvmsg(socket, &mut msghdr as *mut _, flags)
-    }));
+    let n = cvt_r(|| unsafe { libc::recvmsg(socket, &mut msghdr as *mut _, flags) })?;
 
     let controllen = msghdr.msg_controllen as usize;
     Ok((n, controllen, msghdr.msg_flags))
@@ -98,7 +96,7 @@ pub fn send_msg_with_flags(
     cmsg: &[u8],
     flags: libc::c_int,
 ) -> io::Result<usize> {
-    let slice = iovec::as_os_slice(bufs);
+    let slice = unix::as_os_slice(bufs);
     let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
     let (control, controllen) = if cmsg.is_empty() {
         (ptr::null_mut(), 0)

media/audioipc/audioipc/src/rpc/client/mod.rs

@@ -39,22 +39,19 @@
 // IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+use crate::rpc::driver::Driver;
+use crate::rpc::Handler;
 use futures::sync::oneshot;
 use futures::{Async, Future, Poll, Sink, Stream};
-use rpc::driver::Driver;
-use rpc::Handler;
 use std::collections::VecDeque;
 use std::io;
-use tokio_core::reactor::Handle;
+use tokio::runtime::current_thread;
 
 mod proxy;
 
 pub use self::proxy::{ClientProxy, Response};
 
-pub fn bind_client<C>(
-    transport: C::Transport,
-    handle: &Handle,
-) -> proxy::ClientProxy<C::Request, C::Response>
+pub fn bind_client<C>(transport: C::Transport) -> proxy::ClientProxy<C::Request, C::Response>
 where
     C: Client,
 {
@@ -62,7 +59,7 @@ where
 
     let fut = {
         let handler = ClientHandler::<C> {
-            transport: transport,
+            transport,
             requests: rx,
             in_flight: VecDeque::with_capacity(32),
         };
@@ -70,7 +67,7 @@ where
     };
 
     // Spawn the RPC driver into task
-    handle.spawn(Box::new(fut.map_err(|_| ())));
+    current_thread::spawn(fut.map_err(|_| ()));
 
     tx
 }

media/audioipc/audioipc/src/rpc/client/proxy.rs

@@ -104,7 +104,7 @@ where
     R: fmt::Debug,
     Q: fmt::Debug,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "ClientProxy {{ ... }}")
     }
 }
@@ -130,7 +130,7 @@ impl<Q> fmt::Debug for Response<Q>
 where
     Q: fmt::Debug,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "Response {{ ... }}")
     }
 }

media/audioipc/audioipc/src/rpc/driver.rs

@@ -3,8 +3,8 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
+use crate::rpc::Handler;
 use futures::{Async, AsyncSink, Future, Poll, Sink, Stream};
-use rpc::Handler;
 use std::fmt;
 use std::io;
 
@@ -29,7 +29,7 @@ where
     /// Create a new rpc driver with the given service and transport.
     pub fn new(handler: T) -> Driver<T> {
         Driver {
-            handler: handler,
+            handler,
             run: true,
             is_flushed: true,
         }
@@ -43,8 +43,8 @@ where
     /// Process incoming messages off the transport.
     fn receive_incoming(&mut self) -> io::Result<()> {
         while self.run {
-            if let Async::Ready(req) = try!(self.handler.transport().poll()) {
-                try!(self.process_incoming(req));
+            if let Async::Ready(req) = self.handler.transport().poll()? {
+                self.process_incoming(req)?;
             } else {
                 break;
             }
@@ -82,10 +82,10 @@ where
     fn send_outgoing(&mut self) -> io::Result<()> {
         trace!("send_responses");
         loop {
-            match try!(self.handler.produce()) {
+            match self.handler.produce()? {
                 Async::Ready(Some(message)) => {
                     trace!("  --> got message");
-                    try!(self.process_outgoing(message));
+                    self.process_outgoing(message)?;
                 }
                 Async::Ready(None) => {
                     trace!("  --> got None");
@@ -103,13 +103,13 @@ where
 
     fn process_outgoing(&mut self, message: T::Out) -> io::Result<()> {
         trace!("process_outgoing");
-        try!(assert_send(&mut self.handler.transport(), message));
+        assert_send(&mut self.handler.transport(), message)?;
 
         Ok(())
     }
 
     fn flush(&mut self) -> io::Result<()> {
-        self.is_flushed = try!(self.handler.transport().poll_complete()).is_ready();
+        self.is_flushed = self.handler.transport().poll_complete()?.is_ready();
 
         // TODO:
         Ok(())
@@ -131,13 +131,13 @@ where
         trace!("rpc::Driver::tick");
 
         // First read off data from the socket
-        try!(self.receive_incoming());
+        self.receive_incoming()?;
 
         // Handle completed responses
-        try!(self.send_outgoing());
+        self.send_outgoing()?;
 
         // Try flushing buffered writes
-        try!(self.flush());
+        self.flush()?;
 
         if self.is_done() {
             trace!("  --> is done.");
@@ -150,7 +150,7 @@ where
 }
 
 fn assert_send<S: Sink>(s: &mut S, item: S::SinkItem) -> Result<(), S::SinkError> {
-    match try!(s.start_send(item)) {
+    match s.start_send(item)? {
         AsyncSink::Ready => Ok(()),
         AsyncSink::NotReady(_) => panic!(
             "sink reported itself as ready after `poll_ready` but was \
@@ -163,7 +163,7 @@ impl<T> fmt::Debug for Driver<T>
 where
     T: Handler + fmt::Debug,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("rpc::Handler")
             .field("handler", &self.handler)
             .field("run", &self.run)

media/audioipc/audioipc/src/rpc/server.rs

@@ -39,29 +39,29 @@
 // IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+use crate::rpc::driver::Driver;
+use crate::rpc::Handler;
 use futures::{Async, Future, Poll, Sink, Stream};
-use rpc::driver::Driver;
-use rpc::Handler;
 use std::collections::VecDeque;
 use std::io;
-use tokio_core::reactor::Handle;
+use tokio::runtime::current_thread;
 
 /// Bind an async I/O object `io` to the `server`.
-pub fn bind_server<S>(transport: S::Transport, server: S, handle: &Handle)
+pub fn bind_server<S>(transport: S::Transport, server: S)
 where
     S: Server,
 {
     let fut = {
         let handler = ServerHandler {
-            server: server,
-            transport: transport,
+            server,
+            transport,
             in_flight: VecDeque::with_capacity(32),
         };
         Driver::new(handler)
     };
 
     // Spawn the RPC driver into task
-    handle.spawn(Box::new(fut.map_err(|_| ())))
+    current_thread::spawn(fut.map_err(|_| ()))
 }
 
 pub trait Server: 'static {

media/audioipc/audioipc/src/shm.rs

@@ -3,11 +3,12 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details.
 
-use errors::*;
-use memmap::{Mmap, MmapViewSync, Protection};
+use crate::errors::*;
+use memmap::{Mmap, MmapMut, MmapOptions};
+use std::cell::UnsafeCell;
 use std::fs::{remove_file, File, OpenOptions};
 use std::path::Path;
-use std::sync::atomic;
+use std::sync::{atomic, Arc};
 
 pub struct SharedMemReader {
     mmap: Mmap,
@@ -22,7 +23,7 @@ impl SharedMemReader {
             .open(path)?;
         let _ = remove_file(path);
         file.set_len(size as u64)?;
-        let mmap = Mmap::open(&file, Protection::Read)?;
+        let mmap = unsafe { MmapOptions::new().map(&file)? };
         assert_eq!(mmap.len(), size);
         Ok((SharedMemReader { mmap }, file))
     }
@@ -34,10 +35,8 @@ impl SharedMemReader {
         // TODO: Track how much is in the shm area.
         if buf.len() <= self.mmap.len() {
             atomic::fence(atomic::Ordering::Acquire);
-            unsafe {
-                let len = buf.len();
-                buf.copy_from_slice(&self.mmap.as_slice()[..len]);
-            }
+            let len = buf.len();
+            buf.copy_from_slice(&self.mmap[..len]);
             Ok(())
         } else {
             bail!("mmap size");
@@ -46,15 +45,15 @@ impl SharedMemReader {
 }
 
 pub struct SharedMemSlice {
-    view: MmapViewSync,
+    mmap: Arc<Mmap>,
 }
 
 impl SharedMemSlice {
     pub fn from(file: &File, size: usize) -> Result<SharedMemSlice> {
-        let mmap = Mmap::open(file, Protection::Read)?;
+        let mmap = unsafe { MmapOptions::new().map(file)? };
         assert_eq!(mmap.len(), size);
-        let view = mmap.into_view_sync();
-        Ok(SharedMemSlice { view })
+        let mmap = Arc::new(mmap);
+        Ok(SharedMemSlice { mmap })
     }
 
     pub fn get_slice(&self, size: usize) -> Result<&[u8]> {
@@ -62,28 +61,30 @@ impl SharedMemSlice {
             return Ok(&[]);
         }
         // TODO: Track how much is in the shm area.
-        if size <= self.view.len() {
+        if size <= self.mmap.len() {
             atomic::fence(atomic::Ordering::Acquire);
-            let buf = unsafe { &self.view.as_slice()[..size] };
+            let buf = &self.mmap[..size];
             Ok(buf)
         } else {
             bail!("mmap size");
         }
     }
 
-    /// Clones the view of the memory map.
+    /// Clones the memory map.
     ///
-    /// The underlying memory map is shared, and thus the caller must ensure that the memory
-    /// underlying the view is not illegally aliased.
-    pub unsafe fn clone_view(&self) -> Self {
+    /// The underlying memory map is shared, and thus the caller must
+    /// ensure that the memory is not illegally aliased.
+    pub unsafe fn unsafe_clone(&self) -> Self {
         SharedMemSlice {
-            view: self.view.clone(),
+            mmap: self.mmap.clone(),
         }
     }
 }
 
+unsafe impl Send for SharedMemSlice {}
+
 pub struct SharedMemWriter {
-    mmap: Mmap,
+    mmap: MmapMut,
 }
 
 impl SharedMemWriter {
@@ -95,7 +96,7 @@ impl SharedMemWriter {
             .open(path)?;
         let _ = remove_file(path);
         file.set_len(size as u64)?;
-        let mmap = Mmap::open(&file, Protection::ReadWrite)?;
+        let mmap = unsafe { MmapOptions::new().map_mut(&file)? };
         Ok((SharedMemWriter { mmap }, file))
     }
 
@@ -105,9 +106,7 @@ impl SharedMemWriter {
         }
         // TODO: Track how much is in the shm area.
         if buf.len() <= self.mmap.len() {
-            unsafe {
-                self.mmap.as_mut_slice()[..buf.len()].copy_from_slice(buf);
-            }
+            self.mmap[..buf.len()].copy_from_slice(buf);
             atomic::fence(atomic::Ordering::Release);
             Ok(())
         } else {
@@ -117,15 +116,15 @@ impl SharedMemWriter {
 }
 
 pub struct SharedMemMutSlice {
-    view: MmapViewSync,
+    mmap: Arc<UnsafeCell<MmapMut>>,
 }
 
 impl SharedMemMutSlice {
     pub fn from(file: &File, size: usize) -> Result<SharedMemMutSlice> {
-        let mmap = Mmap::open(file, Protection::ReadWrite)?;
+        let mmap = unsafe { MmapOptions::new().map_mut(file)? };
         assert_eq!(mmap.len(), size);
-        let view = mmap.into_view_sync();
-        Ok(SharedMemMutSlice { view })
+        let mmap = Arc::new(UnsafeCell::new(mmap));
+        Ok(SharedMemMutSlice { mmap })
     }
 
     pub fn get_mut_slice(&mut self, size: usize) -> Result<&mut [u8]> {
@@ -133,8 +132,8 @@ impl SharedMemMutSlice {
             return Ok(&mut []);
         }
         // TODO: Track how much is in the shm area.
-        if size <= self.view.len() {
-            let buf = unsafe { &mut self.view.as_mut_slice()[..size] };
+        if size <= self.inner().len() {
+            let buf = &mut self.inner_mut()[..size];
             atomic::fence(atomic::Ordering::Release);
             Ok(buf)
         } else {
@@ -142,14 +141,23 @@ impl SharedMemMutSlice {
         }
     }
 
-    /// Clones the view of the memory map.
+    /// Clones the memory map.
     ///
     /// The underlying memory map is shared, and thus the caller must
-    /// ensure that the memory underlying the view is not illegally
-    /// aliased.
-    pub unsafe fn clone_view(&self) -> Self {
+    /// ensure that the memory is not illegally aliased.
+    pub unsafe fn unsafe_clone(&self) -> Self {
         SharedMemMutSlice {
-            view: self.view.clone(),
+            mmap: self.mmap.clone(),
         }
     }
+
+    fn inner(&self) -> &MmapMut {
+        unsafe { &*self.mmap.get() }
+    }
+
+    fn inner_mut(&mut self) -> &mut MmapMut {
+        unsafe { &mut *self.mmap.get() }
+    }
 }
+
+unsafe impl Send for SharedMemMutSlice {}

media/audioipc/audioipc/src/tokio_named_pipes.rs

@@ -1,175 +0,0 @@
-// From https://github.com/alexcrichton/tokio-named-pipes/commit/3a22f8fc9a441b548aec25bd5df3b1e0ab99fabe
-// License MIT/Apache-2.0
-// Sloppily updated to be compatible with tokio_io
-// To be replaced with tokio_named_pipes crate after tokio 0.1 update.
-#![cfg(windows)]
-
-extern crate bytes;
-extern crate tokio_core;
-extern crate mio_named_pipes;
-extern crate futures;
-
-use std::ffi::OsStr;
-use std::fmt;
-use std::io::{self, Read, Write};
-use std::os::windows::io::*;
-
-use futures::{Async, Poll};
-use bytes::{BufMut, Buf};
-#[allow(deprecated)]
-use tokio_core::io::Io;
-use tokio_io::{AsyncRead, AsyncWrite};
-use tokio_core::reactor::{PollEvented, Handle};
-
-pub struct NamedPipe {
-    io: PollEvented<mio_named_pipes::NamedPipe>,
-}
-
-impl NamedPipe {
-    pub fn new<P: AsRef<OsStr>>(p: P, handle: &Handle) -> io::Result<NamedPipe> {
-        NamedPipe::_new(p.as_ref(), handle)
-    }
-
-    fn _new(p: &OsStr, handle: &Handle) -> io::Result<NamedPipe> {
-        let inner = try!(mio_named_pipes::NamedPipe::new(p));
-        NamedPipe::from_pipe(inner, handle)
-    }
-
-    pub fn from_pipe(pipe: mio_named_pipes::NamedPipe,
-                     handle: &Handle)
-                     -> io::Result<NamedPipe> {
-        Ok(NamedPipe {
-            io: try!(PollEvented::new(pipe, handle)),
-        })
-    }
-
-    pub fn connect(&self) -> io::Result<()> {
-        self.io.get_ref().connect()
-    }
-
-    pub fn disconnect(&self) -> io::Result<()> {
-        self.io.get_ref().disconnect()
-    }
-
-    pub fn need_read(&self) {
-        self.io.need_read()
-    }
-
-    pub fn need_write(&self) {
-        self.io.need_write()
-    }
-
-    pub fn poll_read(&self) -> Async<()> {
-        self.io.poll_read()
-    }
-
-    pub fn poll_write(&self) -> Async<()> {
-        self.io.poll_write()
-    }
-}
-
-impl Read for NamedPipe {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.read(buf)
-    }
-}
-
-impl Write for NamedPipe {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.io.write(buf)
-    }
-    fn flush(&mut self) -> io::Result<()> {
-        self.io.flush()
-    }
-}
-
-#[allow(deprecated)]
-impl Io for NamedPipe {
-    fn poll_read(&mut self) -> Async<()> {
-        <NamedPipe>::poll_read(self)
-    }
-
-    fn poll_write(&mut self) -> Async<()> {
-        <NamedPipe>::poll_write(self)
-    }
-}
-
-impl AsyncRead for NamedPipe {
-    unsafe fn prepare_uninitialized_buffer(&self, _: &mut [u8]) -> bool {
-        false
-    }
-
-    fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
-        if NamedPipe::poll_read(self).is_not_ready() {
-            return Ok(Async::NotReady)
-        }
-
-        let mut stack_buf = [0u8; 1024];
-        let bytes_read = self.io.read(&mut stack_buf);
-        match bytes_read {
-            Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock => {
-                self.io.need_read();
-                return Ok(Async::NotReady);
-            },
-            Err(e) => Err(e),
-            Ok(bytes_read) => {
-                buf.put_slice(&stack_buf[0..bytes_read]);
-                Ok(Async::Ready(bytes_read))
-            }
-        }
-    }
-}
-
-impl AsyncWrite for NamedPipe {
-    fn shutdown(&mut self) -> Poll<(), io::Error> {
-        Ok(().into())
-    }
-
-    fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
-        if NamedPipe::poll_write(self).is_not_ready() {
-            return Ok(Async::NotReady)
-        }
-
-        let bytes_wrt = self.io.write(buf.bytes());
-        match bytes_wrt {
-            Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock => {
-                self.io.need_write();
-                return Ok(Async::NotReady);
-            },
-            Err(e) => Err(e),
-            Ok(bytes_wrt) => {
-                buf.advance(bytes_wrt);
-                Ok(Async::Ready(bytes_wrt))
-            }
-        }
-    }
-
-}
-
-impl<'a> Read for &'a NamedPipe {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        (&self.io).read(buf)
-    }
-}
-
-impl<'a> Write for &'a NamedPipe {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        (&self.io).write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.io).flush()
-    }
-}
-
-impl fmt::Debug for NamedPipe {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.io.get_ref().fmt(f)
-    }
-}
-
-impl AsRawHandle for NamedPipe {
-    fn as_raw_handle(&self) -> RawHandle {
-        self.io.get_ref().as_raw_handle()
-    }
-}

media/audioipc/audioipc/src/tokio_uds_stream.rs

@@ -0,0 +1,363 @@
+// Copied from tokio-uds/src/stream.rs revision 25e835c5b7e2cfeb9c22b1fd576844f6814a9477 (tokio-uds 0.2.5)
+// License MIT per upstream: https://github.com/tokio-rs/tokio/blob/master/tokio-uds/LICENSE
+// - Removed ucred for build simplicity
+// - Added clear_{read,write}_ready per: https://github.com/tokio-rs/tokio/pull/1294
+
+use tokio_io::{AsyncRead, AsyncWrite};
+use tokio_reactor::{Handle, PollEvented};
+
+use bytes::{Buf, BufMut};
+use futures::{Async, Future, Poll};
+use iovec::{self, IoVec};
+use libc;
+use mio::Ready;
+use mio_uds;
+
+use std::fmt;
+use std::io::{self, Read, Write};
+use std::net::Shutdown;
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::os::unix::net::{self, SocketAddr};
+use std::path::Path;
+
+/// A structure representing a connected Unix socket.
+///
+/// This socket can be connected directly with `UnixStream::connect` or accepted
+/// from a listener with `UnixListener::incoming`. Additionally, a pair of
+/// anonymous Unix sockets can be created with `UnixStream::pair`.
+pub struct UnixStream {
+    io: PollEvented<mio_uds::UnixStream>,
+}
+
+/// Future returned by `UnixStream::connect` which will resolve to a
+/// `UnixStream` when the stream is connected.
+#[derive(Debug)]
+pub struct ConnectFuture {
+    inner: State,
+}
+
+#[derive(Debug)]
+enum State {
+    Waiting(UnixStream),
+    Error(io::Error),
+    Empty,
+}
+
+impl UnixStream {
+    /// Connects to the socket named by `path`.
+    ///
+    /// This function will create a new Unix socket and connect to the path
+    /// specified, associating the returned stream with the default event loop's
+    /// handle.
+    pub fn connect<P>(path: P) -> ConnectFuture
+    where
+        P: AsRef<Path>,
+    {
+        let res = mio_uds::UnixStream::connect(path).map(UnixStream::new);
+
+        let inner = match res {
+            Ok(stream) => State::Waiting(stream),
+            Err(e) => State::Error(e),
+        };
+
+        ConnectFuture { inner }
+    }
+
+    /// Consumes a `UnixStream` in the standard library and returns a
+    /// nonblocking `UnixStream` from this crate.
+    ///
+    /// The returned stream will be associated with the given event loop
+    /// specified by `handle` and is ready to perform I/O.
+    pub fn from_std(stream: net::UnixStream, handle: &Handle) -> io::Result<UnixStream> {
+        let stream = mio_uds::UnixStream::from_stream(stream)?;
+        let io = PollEvented::new_with_handle(stream, handle)?;
+
+        Ok(UnixStream { io })
+    }
+
+    /// Creates an unnamed pair of connected sockets.
+    ///
+    /// This function will create a pair of interconnected Unix sockets for
+    /// communicating back and forth between one another. Each socket will
+    /// be associated with the default event loop's handle.
+    pub fn pair() -> io::Result<(UnixStream, UnixStream)> {
+        let (a, b) = mio_uds::UnixStream::pair()?;
+        let a = UnixStream::new(a);
+        let b = UnixStream::new(b);
+
+        Ok((a, b))
+    }
+
+    pub(crate) fn new(stream: mio_uds::UnixStream) -> UnixStream {
+        let io = PollEvented::new(stream);
+        UnixStream { io }
+    }
+
+    /// Test whether this socket is ready to be read or not.
+    pub fn poll_read_ready(&self, ready: Ready) -> Poll<Ready, io::Error> {
+        self.io.poll_read_ready(ready)
+    }
+
+    /// Clear read ready state.
+    pub fn clear_read_ready(&self, ready: mio::Ready) -> io::Result<()> {
+        self.io.clear_read_ready(ready)
+    }
+
+    /// Test whether this socket is ready to be written to or not.
+    pub fn poll_write_ready(&self) -> Poll<Ready, io::Error> {
+        self.io.poll_write_ready()
+    }
+
+    /// Clear write ready state.
+    pub fn clear_write_ready(&self) -> io::Result<()> {
+        self.io.clear_write_ready()
+    }
+
+    /// Returns the socket address of the local half of this connection.
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.io.get_ref().local_addr()
+    }
+
+    /// Returns the socket address of the remote half of this connection.
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        self.io.get_ref().peer_addr()
+    }
+
+    /// Returns the value of the `SO_ERROR` option.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.io.get_ref().take_error()
+    }
+
+    /// Shuts down the read, write, or both halves of this connection.
+    ///
+    /// This function will cause all pending and future I/O calls on the
+    /// specified portions to immediately return with an appropriate value
+    /// (see the documentation of `Shutdown`).
+    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+        self.io.get_ref().shutdown(how)
+    }
+}
+
+impl Read for UnixStream {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        self.io.read(buf)
+    }
+}
+
+impl Write for UnixStream {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.io.write(buf)
+    }
+    fn flush(&mut self) -> io::Result<()> {
+        self.io.flush()
+    }
+}
+
+impl AsyncRead for UnixStream {
+    unsafe fn prepare_uninitialized_buffer(&self, _: &mut [u8]) -> bool {
+        false
+    }
+
+    fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
+        <&UnixStream>::read_buf(&mut &*self, buf)
+    }
+}
+
+impl AsyncWrite for UnixStream {
+    fn shutdown(&mut self) -> Poll<(), io::Error> {
+        <&UnixStream>::shutdown(&mut &*self)
+    }
+
+    fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
+        <&UnixStream>::write_buf(&mut &*self, buf)
+    }
+}
+
+impl<'a> Read for &'a UnixStream {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        (&self.io).read(buf)
+    }
+}
+
+impl<'a> Write for &'a UnixStream {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        (&self.io).write(buf)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        (&self.io).flush()
+    }
+}
+
+impl<'a> AsyncRead for &'a UnixStream {
+    unsafe fn prepare_uninitialized_buffer(&self, _: &mut [u8]) -> bool {
+        false
+    }
+
+    fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
+        if let Async::NotReady = <UnixStream>::poll_read_ready(self, Ready::readable())? {
+            return Ok(Async::NotReady);
+        }
+        unsafe {
+            let r = read_ready(buf, self.as_raw_fd());
+            if r == -1 {
+                let e = io::Error::last_os_error();
+                if e.kind() == io::ErrorKind::WouldBlock {
+                    self.io.clear_read_ready(Ready::readable())?;
+                    Ok(Async::NotReady)
+                } else {
+                    Err(e)
+                }
+            } else {
+                let r = r as usize;
+                buf.advance_mut(r);
+                Ok(r.into())
+            }
+        }
+    }
+}
+
+impl<'a> AsyncWrite for &'a UnixStream {
+    fn shutdown(&mut self) -> Poll<(), io::Error> {
+        Ok(().into())
+    }
+
+    fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
+        if let Async::NotReady = <UnixStream>::poll_write_ready(self)? {
+            return Ok(Async::NotReady);
+        }
+        unsafe {
+            let r = write_ready(buf, self.as_raw_fd());
+            if r == -1 {
+                let e = io::Error::last_os_error();
+                if e.kind() == io::ErrorKind::WouldBlock {
+                    self.io.clear_write_ready()?;
+                    Ok(Async::NotReady)
+                } else {
+                    Err(e)
+                }
+            } else {
+                let r = r as usize;
+                buf.advance(r);
+                Ok(r.into())
+            }
+        }
+    }
+}
+
+impl fmt::Debug for UnixStream {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.io.get_ref().fmt(f)
+    }
+}
+
+impl AsRawFd for UnixStream {
+    fn as_raw_fd(&self) -> RawFd {
+        self.io.get_ref().as_raw_fd()
+    }
+}
+
+impl Future for ConnectFuture {
+    type Item = UnixStream;
+    type Error = io::Error;
+
+    fn poll(&mut self) -> Poll<UnixStream, io::Error> {
+        use std::mem;
+
+        match self.inner {
+            State::Waiting(ref mut stream) => {
+                if let Async::NotReady = stream.io.poll_write_ready()? {
+                    return Ok(Async::NotReady);
+                }
+
+                if let Some(e) = stream.io.get_ref().take_error()? {
+                    return Err(e);
+                }
+            }
+            State::Error(_) => {
+                let e = match mem::replace(&mut self.inner, State::Empty) {
+                    State::Error(e) => e,
+                    _ => unreachable!(),
+                };
+
+                return Err(e);
+            }
+            State::Empty => panic!("can't poll stream twice"),
+        }
+
+        match mem::replace(&mut self.inner, State::Empty) {
+            State::Waiting(stream) => Ok(Async::Ready(stream)),
+            _ => unreachable!(),
+        }
+    }
+}
+
+unsafe fn read_ready<B: BufMut>(buf: &mut B, raw_fd: RawFd) -> isize {
+    // The `IoVec` type can't have a 0-length size, so we create a bunch
+    // of dummy versions on the stack with 1 length which we'll quickly
+    // overwrite.
+    let b1: &mut [u8] = &mut [0];
+    let b2: &mut [u8] = &mut [0];
+    let b3: &mut [u8] = &mut [0];
+    let b4: &mut [u8] = &mut [0];
+    let b5: &mut [u8] = &mut [0];
+    let b6: &mut [u8] = &mut [0];
+    let b7: &mut [u8] = &mut [0];
+    let b8: &mut [u8] = &mut [0];
+    let b9: &mut [u8] = &mut [0];
+    let b10: &mut [u8] = &mut [0];
+    let b11: &mut [u8] = &mut [0];
+    let b12: &mut [u8] = &mut [0];
+    let b13: &mut [u8] = &mut [0];
+    let b14: &mut [u8] = &mut [0];
+    let b15: &mut [u8] = &mut [0];
+    let b16: &mut [u8] = &mut [0];
+    let mut bufs: [&mut IoVec; 16] = [
+        b1.into(),
+        b2.into(),
+        b3.into(),
+        b4.into(),
+        b5.into(),
+        b6.into(),
+        b7.into(),
+        b8.into(),
+        b9.into(),
+        b10.into(),
+        b11.into(),
+        b12.into(),
+        b13.into(),
+        b14.into(),
+        b15.into(),
+        b16.into(),
+    ];
+
+    let n = buf.bytes_vec_mut(&mut bufs);
+    read_ready_vecs(&mut bufs[..n], raw_fd)
+}
+
+unsafe fn read_ready_vecs(bufs: &mut [&mut IoVec], raw_fd: RawFd) -> isize {
+    let iovecs = iovec::unix::as_os_slice_mut(bufs);
+
+    libc::readv(raw_fd, iovecs.as_ptr(), iovecs.len() as i32)
+}
+
+unsafe fn write_ready<B: Buf>(buf: &mut B, raw_fd: RawFd) -> isize {
+    // The `IoVec` type can't have a zero-length size, so create a dummy
+    // version from a 1-length slice which we'll overwrite with the
+    // `bytes_vec` method.
+    static DUMMY: &[u8] = &[0];
+    let iovec = <&IoVec>::from(DUMMY);
+    let mut bufs = [
+        iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec, iovec,
+        iovec, iovec, iovec,
+    ];
+
+    let n = buf.bytes_vec(&mut bufs);
+    write_ready_vecs(&bufs[..n], raw_fd)
+}
+
+unsafe fn write_ready_vecs(bufs: &[&IoVec], raw_fd: RawFd) -> isize {
+    let iovecs = iovec::unix::as_os_slice(bufs);
+
+    libc::writev(raw_fd, iovecs.as_ptr(), iovecs.len() as i32)
+}

media/audioipc/client/Cargo.toml

@@ -6,17 +6,14 @@ authors = [
         "Dan Glastonbury <dan.glastonbury@gmail.com>"
         ]
 description = "Cubeb Backend for talking to remote cubeb server."
+edition = "2018"
 
 [dependencies]
+audio_thread_priority = "0.15.0"
 audioipc = { path="../audioipc" }
-cubeb-backend = "0.5.4"
-foreign-types = "0.3"
+cubeb-backend = "0.5.5"
 futures = { version="0.1.18", default-features=false, features=["use_std"] }
 futures-cpupool = { version="0.1.8", default-features=false }
-libc = "0.2"
-log = "0.4"
-tokio-core = "0.1"
-tokio-uds = "0.1.7"
-audio_thread_priority = "0.15.0"
 lazy_static = "1.2.0"
-cfg-if = "0.1.0"
+log = "0.4"
+tokio = "0.1"

media/audioipc/client/src/context.rs

@@ -3,48 +3,46 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
-use assert_not_in_callback;
+use crate::assert_not_in_callback;
+use crate::stream;
+#[cfg(target_os = "linux")]
+use crate::G_THREAD_POOL;
+use crate::{ClientStream, CpuPoolInitParams, CPUPOOL_INIT_PARAMS, G_SERVER_FD};
 use audio_thread_priority::promote_current_thread_to_real_time;
 use audioipc::codec::LengthDelimitedCodec;
+use audioipc::frame::{framed, Framed};
 use audioipc::platformhandle_passing::{framed_with_platformhandles, FramedWithPlatformHandles};
 use audioipc::{core, rpc};
-use audioipc::{messages, ClientMessage, ServerMessage};
+use audioipc::{
+    messages, messages::DeviceCollectionReq, messages::DeviceCollectionResp, ClientMessage,
+    ServerMessage,
+};
 use cubeb_backend::{
     ffi, Context, ContextOps, DeviceCollectionRef, DeviceId, DeviceType, Error, Ops, Result,
     Stream, StreamParams, StreamParamsRef,
 };
 use futures::Future;
-use futures_cpupool::CpuPool;
+use futures_cpupool::{CpuFuture, CpuPool};
 use std::ffi::{CStr, CString};
 use std::os::raw::c_void;
 use std::sync::mpsc;
+use std::sync::{Arc, Mutex};
 use std::thread;
 use std::{fmt, io, mem, ptr};
-use stream;
-use tokio_core::reactor::{Handle, Remote};
-use {ClientStream, CpuPoolInitParams, CPUPOOL_INIT_PARAMS, G_SERVER_FD};
-cfg_if! {
-    if #[cfg(target_os = "linux")] {
-        use {G_THREAD_POOL};
-    }
-}
+use tokio::reactor;
+use tokio::runtime::current_thread;
 
 struct CubebClient;
 
 impl rpc::Client for CubebClient {
     type Request = ServerMessage;
     type Response = ClientMessage;
-    type Transport = FramedWithPlatformHandles<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Request, Self::Response>>;
+    type Transport = FramedWithPlatformHandles<
+        audioipc::AsyncMessageStream,
+        LengthDelimitedCodec<Self::Request, Self::Response>,
+    >;
 }
 
-macro_rules! t(
-    ($e:expr) => (
-        match $e {
-            Ok(e) => e,
-            Err(_) => return Err(Error::default())
-        }
-    ));
-
 pub const CLIENT_OPS: Ops = capi_new!(ClientContext, ClientStream);
 
 // ClientContext's layout *must* match cubeb.c's `struct cubeb` for the
@@ -55,12 +53,16 @@ pub struct ClientContext {
     rpc: rpc::ClientProxy<ServerMessage, ClientMessage>,
     core: core::CoreThread,
     cpu_pool: CpuPool,
+    backend_id: CString,
+    device_collection_rpc: bool,
+    input_device_callback: Arc<Mutex<DeviceCollectionCallback>>,
+    output_device_callback: Arc<Mutex<DeviceCollectionCallback>>,
 }
 
 impl ClientContext {
     #[doc(hidden)]
-    pub fn remote(&self) -> Remote {
-        self.core.remote()
+    pub fn handle(&self) -> current_thread::Handle {
+        self.core.handle()
     }
 
     #[doc(hidden)]
@@ -75,13 +77,16 @@ impl ClientContext {
 }
 
 // TODO: encapsulate connect, etc inside audioipc.
-fn open_server_stream() -> Result<audioipc::MessageStream> {
+fn open_server_stream() -> io::Result<audioipc::MessageStream> {
     unsafe {
         if let Some(fd) = G_SERVER_FD {
             return Ok(audioipc::MessageStream::from_raw_fd(fd.as_raw()));
         }
 
-        Err(Error::default())
+        Err(io::Error::new(
+            io::ErrorKind::Other,
+            "Failed to get server connection.",
+        ))
     }
 }
 
@@ -110,21 +115,74 @@ fn create_thread_pool(init_params: CpuPoolInitParams) -> CpuPool {
         .create()
 }
 
-cfg_if! {
-    if #[cfg(target_os = "linux")] {
-        fn get_thread_pool(init_params: CpuPoolInitParams) -> CpuPool {
-            let mut guard = G_THREAD_POOL.lock().unwrap();
-            if guard.is_some() {
-                // Sandbox is on, and the thread pool was created earlier, before the lockdown.
-                guard.take().unwrap()
-            } else {
-                // Sandbox is off, let's create the pool now, promoting the threads will work.
-                create_thread_pool(init_params)
-            }
-        }
+#[cfg(target_os = "linux")]
+fn get_thread_pool(init_params: CpuPoolInitParams) -> CpuPool {
+    let mut guard = G_THREAD_POOL.lock().unwrap();
+    if guard.is_some() {
+        // Sandbox is on, and the thread pool was created earlier, before the lockdown.
+        guard.take().unwrap()
     } else {
-        fn get_thread_pool(init_params: CpuPoolInitParams) -> CpuPool {
-            create_thread_pool(init_params)
+        // Sandbox is off, let's create the pool now, promoting the threads will work.
+        create_thread_pool(init_params)
+    }
+}
+
+#[cfg(not(target_os = "linux"))]
+fn get_thread_pool(init_params: CpuPoolInitParams) -> CpuPool {
+    create_thread_pool(init_params)
+}
+
+#[derive(Default)]
+struct DeviceCollectionCallback {
+    cb: ffi::cubeb_device_collection_changed_callback,
+    user_ptr: usize,
+}
+
+struct DeviceCollectionServer {
+    input_device_callback: Arc<Mutex<DeviceCollectionCallback>>,
+    output_device_callback: Arc<Mutex<DeviceCollectionCallback>>,
+    cpu_pool: CpuPool,
+}
+
+impl rpc::Server for DeviceCollectionServer {
+    type Request = DeviceCollectionReq;
+    type Response = DeviceCollectionResp;
+    type Future = CpuFuture<Self::Response, ()>;
+    type Transport =
+        Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Response, Self::Request>>;
+
+    fn process(&mut self, req: Self::Request) -> Self::Future {
+        match req {
+            DeviceCollectionReq::DeviceChange(device_type) => {
+                trace!(
+                    "ctx_thread: DeviceChange Callback: device_type={}",
+                    device_type
+                );
+
+                let devtype = cubeb_backend::DeviceType::from_bits_truncate(device_type);
+
+                let (input_cb, input_user_ptr) = {
+                    let dcb = self.input_device_callback.lock().unwrap();
+                    (dcb.cb, dcb.user_ptr)
+                };
+                let (output_cb, output_user_ptr) = {
+                    let dcb = self.output_device_callback.lock().unwrap();
+                    (dcb.cb, dcb.user_ptr)
+                };
+
+                self.cpu_pool.spawn_fn(move || {
+                    if devtype.contains(cubeb_backend::DeviceType::INPUT) {
+                        unsafe { input_cb.unwrap()(ptr::null_mut(), input_user_ptr as *mut c_void) }
+                    }
+                    if devtype.contains(cubeb_backend::DeviceType::OUTPUT) {
+                        unsafe {
+                            output_cb.unwrap()(ptr::null_mut(), output_user_ptr as *mut c_void)
+                        }
+                    }
+
+                    Ok(DeviceCollectionResp::DeviceChange)
+                })
+            }
         }
     }
 }
@@ -133,15 +191,14 @@ impl ContextOps for ClientContext {
     fn init(_context_name: Option<&CStr>) -> Result<Context> {
         fn bind_and_send_client(
             stream: audioipc::AsyncMessageStream,
-            handle: &Handle,
             tx_rpc: &mpsc::Sender<rpc::ClientProxy<ServerMessage, ClientMessage>>,
-        ) -> Option<()> {
+        ) -> io::Result<()> {
             let transport = framed_with_platformhandles(stream, Default::default());
-            let rpc = rpc::bind_client::<CubebClient>(transport, handle);
+            let rpc = rpc::bind_client::<CubebClient>(transport);
             // If send fails then the rx end has closed
             // which is unlikely here.
             let _ = tx_rpc.send(rpc);
-            Some(())
+            Ok(())
         }
 
         assert_not_in_callback();
@@ -150,43 +207,45 @@ impl ContextOps for ClientContext {
 
         let params = CPUPOOL_INIT_PARAMS.with(|p| p.replace(None).unwrap());
 
-        let core = t!(core::spawn_thread("AudioIPC Client RPC", move || {
-            let handle = core::handle();
+        let core = core::spawn_thread("AudioIPC Client RPC", move || {
+            let handle = reactor::Handle::default();
 
             register_thread(params.thread_create_callback);
 
             open_server_stream()
-                .ok()
-                .and_then(|stream| stream.into_tokio_ipc(&handle).ok())
-                .and_then(|stream| bind_and_send_client(stream, &handle, &tx_rpc))
-                .ok_or_else(|| {
-                    io::Error::new(
-                        io::ErrorKind::Other,
-                        "Failed to open stream and create rpc.",
-                    )
-                })
-        }));
+                .and_then(|stream| stream.into_tokio_ipc(&handle))
+                .and_then(|stream| bind_and_send_client(stream, &tx_rpc))
+        })
+        .map_err(|_| Error::default())?;
 
-        let rpc = t!(rx_rpc.recv());
+        let rpc = rx_rpc.recv().map_err(|_| Error::default())?;
 
         // Don't let errors bubble from here.  Later calls against this context
         // will return errors the caller expects to handle.
         let _ = send_recv!(rpc, ClientConnect(std::process::id()) => ClientConnected);
 
-        let pool = get_thread_pool(params);
+        let backend_id = send_recv!(rpc, ContextGetBackendId => ContextBackendId())
+            .unwrap_or_else(|_| "(remote error)".to_string());
+        let backend_id = CString::new(backend_id).expect("backend_id query failed");
+
+        let cpu_pool = get_thread_pool(params);
 
         let ctx = Box::new(ClientContext {
             _ops: &CLIENT_OPS as *const _,
-            rpc: rpc,
-            core: core,
-            cpu_pool: pool,
+            rpc,
+            core,
+            cpu_pool,
+            backend_id,
+            device_collection_rpc: false,
+            input_device_callback: Arc::new(Mutex::new(Default::default())),
+            output_device_callback: Arc::new(Mutex::new(Default::default())),
         });
         Ok(unsafe { Context::from_ptr(Box::into_raw(ctx) as *mut _) })
     }
 
-    fn backend_id(&mut self) -> &'static CStr {
+    fn backend_id(&mut self) -> &CStr {
         assert_not_in_callback();
-        unsafe { CStr::from_ptr(b"remote\0".as_ptr() as *const _) }
+        self.backend_id.as_c_str()
     }
 
     fn max_channel_count(&mut self) -> Result<u32> {
@@ -264,7 +323,7 @@ impl ContextOps for ClientContext {
         input_stream_params: Option<&StreamParamsRef>,
         output_device: DeviceId,
         output_stream_params: Option<&StreamParamsRef>,
-        latency_frame: u32,
+        latency_frames: u32,
         // These params aren't sent to the server
         data_callback: ffi::cubeb_data_callback,
         state_callback: ffi::cubeb_state_callback,
@@ -288,24 +347,75 @@ impl ContextOps for ClientContext {
         let output_stream_params = opt_stream_params(output_stream_params);
 
         let init_params = messages::StreamInitParams {
-            stream_name: stream_name,
+            stream_name,
             input_device: input_device as usize,
-            input_stream_params: input_stream_params,
+            input_stream_params,
             output_device: output_device as usize,
-            output_stream_params: output_stream_params,
-            latency_frames: latency_frame,
+            output_stream_params,
+            latency_frames,
         };
         stream::init(self, init_params, data_callback, state_callback, user_ptr)
     }
 
     fn register_device_collection_changed(
         &mut self,
-        _dev_type: DeviceType,
-        _collection_changed_callback: ffi::cubeb_device_collection_changed_callback,
-        _user_ptr: *mut c_void,
+        devtype: DeviceType,
+        collection_changed_callback: ffi::cubeb_device_collection_changed_callback,
+        user_ptr: *mut c_void,
     ) -> Result<()> {
         assert_not_in_callback();
-        Err(Error::not_supported())
+
+        if !self.device_collection_rpc {
+            let fds = send_recv!(self.rpc(),
+                                 ContextSetupDeviceCollectionCallback =>
+                                 ContextSetupDeviceCollectionCallback())?;
+
+            let stream =
+                unsafe { audioipc::MessageStream::from_raw_fd(fds.platform_handles[0].as_raw()) };
+
+            // TODO: The lowest comms layer expects exactly 3 PlatformHandles, but we only
+            // need one here.  Drop the dummy handles the other side sent us to discard.
+            unsafe {
+                fds.platform_handles[1].into_file();
+                fds.platform_handles[2].into_file();
+            }
+
+            let server = DeviceCollectionServer {
+                input_device_callback: self.input_device_callback.clone(),
+                output_device_callback: self.output_device_callback.clone(),
+                cpu_pool: self.cpu_pool(),
+            };
+
+            let (wait_tx, wait_rx) = mpsc::channel();
+            self.handle()
+                .spawn(futures::future::lazy(move || {
+                    let handle = reactor::Handle::default();
+                    let stream = stream.into_tokio_ipc(&handle).unwrap();
+                    let transport = framed(stream, Default::default());
+                    rpc::bind_server(transport, server);
+                    wait_tx.send(()).unwrap();
+                    Ok(())
+                }))
+                .expect("Failed to spawn DeviceCollectionServer");
+            wait_rx.recv().unwrap();
+            self.device_collection_rpc = true;
+        }
+
+        if devtype.contains(cubeb_backend::DeviceType::INPUT) {
+            let mut cb = self.input_device_callback.lock().unwrap();
+            cb.cb = collection_changed_callback;
+            cb.user_ptr = user_ptr as usize;
+        }
+        if devtype.contains(cubeb_backend::DeviceType::OUTPUT) {
+            let mut cb = self.output_device_callback.lock().unwrap();
+            cb.cb = collection_changed_callback;
+            cb.user_ptr = user_ptr as usize;
+        }
+
+        let enable = collection_changed_callback.is_some();
+        send_recv!(self.rpc(),
+                   ContextRegisterDeviceCollectionChanged(devtype.bits(), enable) =>
+                   ContextRegisteredDeviceCollectionChanged)
     }
 }
 
@@ -322,7 +432,7 @@ impl Drop for ClientContext {
 }
 
 impl fmt::Debug for ClientContext {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("ClientContext")
             .field("_ops", &self._ops)
             .field("rpc", &self.rpc)

media/audioipc/client/src/lib.rs

@@ -2,45 +2,36 @@
 //
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details.
+#![warn(unused_extern_crates)]
 
-extern crate audioipc;
 #[macro_use]
 extern crate cubeb_backend;
-extern crate foreign_types;
-extern crate futures;
-extern crate futures_cpupool;
-extern crate libc;
 #[macro_use]
 extern crate log;
-extern crate tokio_core;
-extern crate tokio_uds;
-extern crate audio_thread_priority;
 #[macro_use]
 extern crate lazy_static;
-#[macro_use]
-extern crate cfg_if;
 
 #[macro_use]
 mod send_recv;
 mod context;
 mod stream;
 
-use audioipc::{PlatformHandleType, PlatformHandle};
-use context::ClientContext;
-use cubeb_backend::{capi, ffi};
-use std::os::raw::{c_char, c_int};
-use stream::ClientStream;
-use std::sync::{Mutex};
-use futures_cpupool::CpuPool;
+use crate::context::ClientContext;
+use crate::stream::ClientStream;
+#[cfg(target_os = "linux")]
+use audio_thread_priority::promote_current_thread_to_real_time;
 use audio_thread_priority::RtPriorityHandle;
-cfg_if! {
-    if #[cfg(target_os = "linux")] {
-        use std::sync::{Arc, Condvar};
-        use std::ffi::CString;
-        use std::thread;
-        use audio_thread_priority::promote_current_thread_to_real_time;
-    }
-}
+use audioipc::{PlatformHandle, PlatformHandleType};
+use cubeb_backend::{capi, ffi};
+use futures_cpupool::CpuPool;
+#[cfg(target_os = "linux")]
+use std::ffi::CString;
+use std::os::raw::{c_char, c_int};
+use std::sync::Mutex;
+#[cfg(target_os = "linux")]
+use std::sync::{Arc, Condvar};
+#[cfg(target_os = "linux")]
+use std::thread;
 
 type InitParamsTls = std::cell::RefCell<Option<CpuPoolInitParams>>;
 
@@ -105,58 +96,63 @@ where
 
 static mut G_SERVER_FD: Option<PlatformHandle> = None;
 
-cfg_if! {
-    if #[cfg(target_os = "linux")] {
-        #[no_mangle]
-        pub unsafe extern "C" fn audioipc_init_threads(init_params: *const AudioIpcInitParams) {
-            let thread_create_callback = (*init_params).thread_create_callback;
+#[cfg(target_os = "linux")]
+#[no_mangle]
+pub unsafe extern "C" fn audioipc_init_threads(init_params: *const AudioIpcInitParams) {
+    let thread_create_callback = (*init_params).thread_create_callback;
 
-            // It is critical that this function waits until the various threads are created, promoted to
-            // real-time, and _then_ return, because the sandbox lockdown happens right after returning
-            // from here.
-            let pair = Arc::new((Mutex::new((*init_params).pool_size), Condvar::new()));
-            let pair2 = pair.clone();
+    // It is critical that this function waits until the various threads are created, promoted to
+    // real-time, and _then_ return, because the sandbox lockdown happens right after returning
+    // from here.
+    let pair = Arc::new((Mutex::new((*init_params).pool_size), Condvar::new()));
+    let pair2 = pair.clone();
 
-            let register_thread = move || {
-                if let Some(func) = thread_create_callback {
-                    match promote_current_thread_to_real_time(0, 48000) {
-                        Ok(handle) => {
-                            G_PRIORITY_HANDLES.with(|handles| {
-                                (handles.borrow_mut()).push(handle);
-                            });
-                        }
-                        Err(_) => {
-                            warn!("Could not promote audio threads to real-time during initialization.");
-                        }
-                    }
-                    let thr = thread::current();
-                    let name = CString::new(thr.name().unwrap()).unwrap();
-                    func(name.as_ptr());
-                    let &(ref lock, ref cvar) = &*pair2;
-                    let mut count = lock.lock().unwrap();
-                    *count -= 1;
-                    cvar.notify_one();
+    let register_thread = move || {
+        if let Some(func) = thread_create_callback {
+            match promote_current_thread_to_real_time(0, 48000) {
+                Ok(handle) => {
+                    G_PRIORITY_HANDLES.with(|handles| {
+                        (handles.borrow_mut()).push(handle);
+                    });
+                }
+                Err(_) => {
+                    warn!("Could not promote audio threads to real-time during initialization.");
                 }
-            };
-
-            let mut pool = G_THREAD_POOL.lock().unwrap();
-
-            *pool = Some(futures_cpupool::Builder::new()
-                         .name_prefix("AudioIPC")
-                         .after_start(register_thread)
-                         .pool_size((*init_params).pool_size)
-                         .stack_size((*init_params).stack_size)
-                         .create());
-
-            let &(ref lock, ref cvar) = &*pair;
-            let mut count = lock.lock().unwrap();
-            while *count != 0 {
-                count = cvar.wait(count).unwrap();
             }
+            let thr = thread::current();
+            let name = CString::new(thr.name().unwrap()).unwrap();
+            func(name.as_ptr());
+            let &(ref lock, ref cvar) = &*pair2;
+            let mut count = lock.lock().unwrap();
+            *count -= 1;
+            cvar.notify_one();
         }
+    };
+
+    let mut pool = G_THREAD_POOL.lock().unwrap();
+
+    *pool = Some(
+        futures_cpupool::Builder::new()
+            .name_prefix("AudioIPC")
+            .after_start(register_thread)
+            .pool_size((*init_params).pool_size)
+            .stack_size((*init_params).stack_size)
+            .create(),
+    );
+
+    let &(ref lock, ref cvar) = &*pair;
+    let mut count = lock.lock().unwrap();
+    while *count != 0 {
+        count = cvar.wait(count).unwrap();
     }
 }
 
+#[cfg(not(target_os = "linux"))]
+#[no_mangle]
+pub unsafe extern "C" fn audioipc_init_threads(_: *const AudioIpcInitParams) {
+    unimplemented!();
+}
+
 #[no_mangle]
 /// Entry point from C code.
 pub unsafe extern "C" fn audioipc_client_init(

media/audioipc/client/src/stream.rs

@@ -3,6 +3,8 @@
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
 
+use crate::ClientContext;
+use crate::{assert_not_in_callback, set_in_callback};
 use audioipc::codec::LengthDelimitedCodec;
 use audioipc::frame::{framed, Framed};
 use audioipc::messages::{self, CallbackReq, CallbackResp, ClientMessage, ServerMessage};
@@ -15,11 +17,8 @@ use std::ffi::CString;
 use std::os::raw::c_void;
 use std::ptr;
 use std::sync::mpsc;
-use ClientContext;
-use {assert_not_in_callback, set_in_callback};
-
-// TODO: Remove and let caller allocate based on cubeb backend requirements.
-const SHM_AREA_SIZE: usize = 2 * 1024 * 1024;
+use std::sync::{Arc, Mutex};
+use tokio::reactor;
 
 pub struct Device(ffi::cubeb_device);
 
@@ -46,6 +45,7 @@ pub struct ClientStream<'ctx> {
     context: &'ctx ClientContext,
     user_ptr: *mut c_void,
     token: usize,
+    device_change_cb: Arc<Mutex<ffi::cubeb_device_changed_callback>>,
 }
 
 struct CallbackServer {
@@ -55,17 +55,23 @@ struct CallbackServer {
     state_cb: ffi::cubeb_state_callback,
     user_ptr: usize,
     cpu_pool: CpuPool,
+    device_change_cb: Arc<Mutex<ffi::cubeb_device_changed_callback>>,
 }
 
 impl rpc::Server for CallbackServer {
     type Request = CallbackReq;
     type Response = CallbackResp;
     type Future = CpuFuture<Self::Response, ()>;
-    type Transport = Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Response, Self::Request>>;
+    type Transport =
+        Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Response, Self::Request>>;
 
     fn process(&mut self, req: Self::Request) -> Self::Future {
         match req {
-            CallbackReq::Data { nframes, input_frame_size, output_frame_size } => {
+            CallbackReq::Data {
+                nframes,
+                input_frame_size,
+                output_frame_size,
+            } => {
                 trace!(
                     "stream_thread: Data Callback: nframes={} input_fs={} output_fs={}",
                     nframes,
@@ -75,11 +81,11 @@ impl rpc::Server for CallbackServer {
 
                 // Clone values that need to be moved into the cpu pool thread.
                 let input_shm = match self.input_shm {
-                    Some(ref shm) => unsafe { Some(shm.clone_view()) },
+                    Some(ref shm) => unsafe { Some(shm.unsafe_clone()) },
                     None => None,
                 };
                 let mut output_shm = match self.output_shm {
-                    Some(ref shm) => unsafe { Some(shm.clone_view()) },
+                    Some(ref shm) => unsafe { Some(shm.unsafe_clone()) },
                     None => None,
                 };
                 let user_ptr = self.user_ptr;
@@ -131,6 +137,24 @@ impl rpc::Server for CallbackServer {
                     Ok(CallbackResp::State)
                 })
             }
+            CallbackReq::DeviceChange => {
+                let cb = self.device_change_cb.clone();
+                let user_ptr = self.user_ptr;
+                self.cpu_pool.spawn_fn(move || {
+                    set_in_callback(true);
+                    let cb = cb.lock().unwrap();
+                    if let Some(cb) = *cb {
+                        unsafe {
+                            cb(user_ptr as *mut _);
+                        }
+                    } else {
+                        warn!("DeviceChange received with null callback");
+                    }
+                    set_in_callback(false);
+
+                    Ok(CallbackResp::DeviceChange)
+                })
+            }
         }
     }
 }
@@ -149,9 +173,12 @@ impl<'ctx> ClientStream<'ctx> {
         let has_output = init_params.output_stream_params.is_some();
 
         let rpc = ctx.rpc();
-        let data = try!(send_recv!(rpc, StreamInit(init_params) => StreamCreated()));
+        let data = send_recv!(rpc, StreamInit(init_params) => StreamCreated())?;
 
-        debug!("token = {}, handles = {:?}", data.token, data.platform_handles);
+        debug!(
+            "token = {}, handles = {:?}",
+            data.token, data.platform_handles
+        );
 
         let stm = data.platform_handles[0];
         let stream = unsafe { audioipc::MessageStream::from_raw_fd(stm.as_raw()) };
@@ -159,7 +186,7 @@ impl<'ctx> ClientStream<'ctx> {
         let input = data.platform_handles[1];
         let input_file = unsafe { input.into_file() };
         let input_shm = if has_input {
-            Some(SharedMemSlice::from(&input_file, SHM_AREA_SIZE).unwrap())
+            Some(SharedMemSlice::from(&input_file, audioipc::SHM_AREA_SIZE).unwrap())
         } else {
             None
         };
@@ -167,7 +194,7 @@ impl<'ctx> ClientStream<'ctx> {
         let output = data.platform_handles[2];
         let output_file = unsafe { output.into_file() };
         let output_shm = if has_output {
-            Some(SharedMemMutSlice::from(&output_file, SHM_AREA_SIZE).unwrap())
+            Some(SharedMemMutSlice::from(&output_file, audioipc::SHM_AREA_SIZE).unwrap())
         } else {
             None
         };
@@ -176,29 +203,37 @@ impl<'ctx> ClientStream<'ctx> {
 
         let cpu_pool = ctx.cpu_pool();
 
+        let null_cb: ffi::cubeb_device_changed_callback = None;
+        let device_change_cb = Arc::new(Mutex::new(null_cb));
+
         let server = CallbackServer {
-            input_shm: input_shm,
-            output_shm: output_shm,
+            input_shm,
+            output_shm,
             data_cb: data_callback,
             state_cb: state_callback,
             user_ptr: user_data,
-            cpu_pool: cpu_pool,
+            cpu_pool,
+            device_change_cb: device_change_cb.clone(),
         };
 
         let (wait_tx, wait_rx) = mpsc::channel();
-        ctx.remote().spawn(move |handle| {
-            let stream = stream.into_tokio_ipc(handle).unwrap();
-            let transport = framed(stream, Default::default());
-            rpc::bind_server(transport, server, handle);
-            wait_tx.send(()).unwrap();
-            Ok(())
-        });
+        ctx.handle()
+            .spawn(futures::future::lazy(move || {
+                let handle = reactor::Handle::default();
+                let stream = stream.into_tokio_ipc(&handle).unwrap();
+                let transport = framed(stream, Default::default());
+                rpc::bind_server(transport, server);
+                wait_tx.send(()).unwrap();
+                Ok(())
+            }))
+            .expect("Failed to spawn CallbackServer");
         wait_rx.recv().unwrap();
 
         let stream = Box::into_raw(Box::new(ClientStream {
             context: ctx,
-            user_ptr: user_ptr,
+            user_ptr,
             token: data.token,
+            device_change_cb,
         }));
         Ok(unsafe { Stream::from_ptr(stream as *mut _) })
     }
@@ -277,13 +312,15 @@ impl<'ctx> StreamOps for ClientStream<'ctx> {
         }
     }
 
-    // TODO: How do we call this back? On what thread?
     fn register_device_changed_callback(
         &mut self,
-        _device_changed_callback: ffi::cubeb_device_changed_callback,
+        device_changed_callback: ffi::cubeb_device_changed_callback,
     ) -> Result<()> {
         assert_not_in_callback();
-        Ok(())
+        let rpc = self.context.rpc();
+        let enable = device_changed_callback.is_some();
+        *self.device_change_cb.lock().unwrap() = device_changed_callback;
+        send_recv!(rpc, StreamRegisterDeviceChangeCallback(self.token, enable) => StreamRegisterDeviceChangeCallback)
     }
 }
 
@@ -294,13 +331,7 @@ pub fn init(
     state_callback: ffi::cubeb_state_callback,
     user_ptr: *mut c_void,
 ) -> Result<Stream> {
-    let stm = try!(ClientStream::init(
-        ctx,
-        init_params,
-        data_callback,
-        state_callback,
-        user_ptr
-    ));
+    let stm = ClientStream::init(ctx, init_params, data_callback, state_callback, user_ptr)?;
     debug_assert_eq!(stm.user_ptr(), user_ptr);
     Ok(stm)
 }

media/audioipc/server/Cargo.toml

@@ -6,20 +6,17 @@ authors = [
         "Dan Glastonbury <dan.glastonbury@gmail.com>"
         ]
 description = "Remote cubeb server"
+edition = "2018"
 
 [dependencies]
+audio_thread_priority = "0.15.0"
 audioipc = { path = "../audioipc" }
-cubeb-core = "0.5.4"
-bytes = "0.4"
-lazycell = "^0.4"
-libc = "0.2"
+cubeb-core = "0.5.5"
+futures = "0.1.18"
+lazy_static = "1.2.0"
 log = "0.4"
 slab = "0.3.0"
-futures = "0.1.18"
-tokio-core = "0.1"
-tokio-uds = "0.1.7"
-audio_thread_priority = "0.15.0"
-lazy_static = "1.2.0"
+tokio = "0.1"
 
 [dependencies.error-chain]
 version = "0.11.0"

media/audioipc/server/src/lib.rs

@@ -2,26 +2,16 @@
 //
 // This program is made available under an ISC-style license.  See the
 // accompanying file LICENSE for details
+#![warn(unused_extern_crates)]
 
 #[macro_use]
 extern crate error_chain;
-
 #[macro_use]
 extern crate log;
-
-extern crate audioipc;
-extern crate bytes;
-extern crate cubeb_core as cubeb;
-extern crate futures;
-extern crate lazycell;
-extern crate libc;
-extern crate slab;
-extern crate tokio_core;
-extern crate tokio_uds;
-extern crate audio_thread_priority;
 #[macro_use]
 extern crate lazy_static;
 
+use audio_thread_priority::promote_current_thread_to_real_time;
 use audioipc::core;
 use audioipc::platformhandle_passing::framed_with_platformhandles;
 use audioipc::rpc;
@@ -29,11 +19,11 @@ use audioipc::{MessageStream, PlatformHandle, PlatformHandleType};
 use futures::sync::oneshot;
 use futures::Future;
 use std::error::Error;
+use std::ffi::{CStr, CString};
 use std::os::raw::c_void;
 use std::ptr;
-use audio_thread_priority::promote_current_thread_to_real_time;
-use std::ffi::{CStr, CString};
 use std::sync::Mutex;
+use tokio::reactor;
 
 mod server;
 
@@ -56,14 +46,14 @@ pub mod errors {
             AudioIPC(::audioipc::errors::Error, ::audioipc::errors::ErrorKind);
         }
         foreign_links {
-            Cubeb(::cubeb::Error);
+            Cubeb(cubeb_core::Error);
             Io(::std::io::Error);
             Canceled(::futures::sync::oneshot::Canceled);
         }
     }
 }
 
-use errors::*;
+use crate::errors::*;
 
 struct ServerWrapper {
     core_thread: core::CoreThread,
@@ -73,50 +63,49 @@ struct ServerWrapper {
 fn run() -> Result<ServerWrapper> {
     trace!("Starting up cubeb audio server event loop thread...");
 
-    let callback_thread = try!(
-        core::spawn_thread("AudioIPC Callback RPC", || {
-            match promote_current_thread_to_real_time(0, 48000) {
-                Ok(_) => { }
-                Err(_) => {
-                    debug!("Failed to promote audio callback thread to real-time.");
-                }
+    let callback_thread = core::spawn_thread("AudioIPC Callback RPC", || {
+        match promote_current_thread_to_real_time(0, 48000) {
+            Ok(_) => {}
+            Err(_) => {
+                debug!("Failed to promote audio callback thread to real-time.");
             }
-            trace!("Starting up cubeb audio callback event loop thread...");
-            Ok(())
-        }).or_else(|e| {
-            debug!(
-                "Failed to start cubeb audio callback event loop thread: {:?}",
-                e.description()
-            );
-            Err(e)
-        })
-    );
+        }
+        trace!("Starting up cubeb audio callback event loop thread...");
+        Ok(())
+    })
+    .or_else(|e| {
+        debug!(
+            "Failed to start cubeb audio callback event loop thread: {:?}",
+            e.description()
+        );
+        Err(e)
+    })?;
 
-    let core_thread = try!(
-        core::spawn_thread("AudioIPC Server RPC", move || Ok(())).or_else(|e| {
-            debug!(
-                "Failed to cubeb audio core event loop thread: {:?}",
-                e.description()
-            );
-            Err(e)
-        })
-    );
+    let core_thread = core::spawn_thread("AudioIPC Server RPC", move || Ok(())).or_else(|e| {
+        debug!(
+            "Failed to cubeb audio core event loop thread: {:?}",
+            e.description()
+        );
+        Err(e)
+    })?;
 
     Ok(ServerWrapper {
-        core_thread: core_thread,
-        callback_thread: callback_thread,
+        core_thread,
+        callback_thread,
     })
 }
 
 #[no_mangle]
-pub extern "C" fn audioipc_server_start(context_name: *const std::os::raw::c_char,
-                                        backend_name: *const std::os::raw::c_char) -> *mut c_void {
+pub unsafe extern "C" fn audioipc_server_start(
+    context_name: *const std::os::raw::c_char,
+    backend_name: *const std::os::raw::c_char,
+) -> *mut c_void {
     let mut params = G_CUBEB_CONTEXT_PARAMS.lock().unwrap();
     if !context_name.is_null() {
-        params.context_name = unsafe { CStr::from_ptr(context_name) }.to_owned();
+        params.context_name = CStr::from_ptr(context_name).to_owned();
     }
     if !backend_name.is_null() {
-        let backend_string = unsafe { CStr::from_ptr(backend_name) }.to_owned();
+        let backend_string = CStr::from_ptr(backend_name).to_owned();
         params.backend_name = Some(backend_string);
     }
     match run() {
@@ -130,7 +119,7 @@ pub extern "C" fn audioipc_server_new_client(p: *mut c_void) -> PlatformHandleTy
     let (wait_tx, wait_rx) = oneshot::channel();
     let wrapper: &ServerWrapper = unsafe { &*(p as *mut _) };
 
-    let cb_remote = wrapper.callback_thread.remote();
+    let core_handle = wrapper.callback_thread.handle();
 
     // We create a connected pair of anonymous IPC endpoints. One side
     // is registered with the reactor core, the other side is returned
@@ -139,22 +128,28 @@ pub extern "C" fn audioipc_server_new_client(p: *mut c_void) -> PlatformHandleTy
         .and_then(|(sock1, sock2)| {
             // Spawn closure to run on same thread as reactor::Core
             // via remote handle.
-            wrapper.core_thread.remote().spawn(|handle| {
-                trace!("Incoming connection");
-                sock2.into_tokio_ipc(handle)
+            wrapper
+                .core_thread
+                .handle()
+                .spawn(futures::future::lazy(|| {
+                    trace!("Incoming connection");
+                    let handle = reactor::Handle::default();
+                    sock2.into_tokio_ipc(&handle)
                     .and_then(|sock| {
                         let transport = framed_with_platformhandles(sock, Default::default());
-                        rpc::bind_server(transport, server::CubebServer::new(cb_remote), handle);
+                        rpc::bind_server(transport, server::CubebServer::new(core_handle));
                         Ok(())
                     }).map_err(|_| ())
                     // Notify waiting thread that sock2 has been registered.
                     .and_then(|_| wait_tx.send(()))
-            });
+                }))
+                .expect("Failed to spawn CubebServer");
             // Wait for notification that sock2 has been registered
             // with reactor::Core.
             let _ = wait_rx.wait();
             Ok(PlatformHandle::from(sock1).as_raw())
-        }).unwrap_or(-1isize as PlatformHandleType)
+        })
+        .unwrap_or(-1isize as PlatformHandleType)
 }
 
 #[no_mangle]

media/audioipc/server/src/server.rs

@@ -4,19 +4,19 @@
 // accompanying file LICENSE for details
 
 use audioipc;
-use audioipc::{MessageStream, PlatformHandle};
 use audioipc::codec::LengthDelimitedCodec;
-use audioipc::core;
-use audioipc::platformhandle_passing::FramedWithPlatformHandles;
 use audioipc::frame::{framed, Framed};
 use audioipc::messages::{
-    CallbackReq, CallbackResp, ClientMessage, Device, DeviceInfo, ServerMessage, StreamCreate,
-    StreamInitParams, StreamParams,
+    CallbackReq, CallbackResp, ClientMessage, Device, DeviceCollectionReq, DeviceCollectionResp,
+    DeviceInfo, RegisterDeviceCollectionChanged, ServerMessage, StreamCreate, StreamInitParams,
+    StreamParams,
 };
+use audioipc::platformhandle_passing::FramedWithPlatformHandles;
 use audioipc::rpc;
 use audioipc::shm::{SharedMemReader, SharedMemWriter};
-use cubeb;
-use cubeb::ffi;
+use audioipc::{MessageStream, PlatformHandle};
+use cubeb_core as cubeb;
+use cubeb_core::ffi;
 use futures::future::{self, FutureResult};
 use futures::sync::oneshot;
 use futures::Future;
@@ -26,25 +26,134 @@ use std::convert::From;
 use std::ffi::CStr;
 use std::mem::{size_of, ManuallyDrop};
 use std::os::raw::{c_long, c_void};
+use std::rc::Rc;
 use std::{panic, slice};
-use tokio_core::reactor::Remote;
+use tokio::reactor;
+use tokio::runtime::current_thread;
 
-use errors::*;
+use crate::errors::*;
 
 fn error(error: cubeb::Error) -> ClientMessage {
     ClientMessage::Error(error.raw_code())
 }
 
-type ContextKey = RefCell<Option<cubeb::Result<cubeb::Context>>>;
-thread_local!(static CONTEXT_KEY: ContextKey = RefCell::new(None));
+struct CubebDeviceCollectionManager {
+    servers: Vec<Rc<RefCell<CubebServerCallbacks>>>,
+    devtype: cubeb::DeviceType,
+}
+
+impl CubebDeviceCollectionManager {
+    fn new() -> CubebDeviceCollectionManager {
+        CubebDeviceCollectionManager {
+            servers: Vec::new(),
+            devtype: cubeb::DeviceType::empty(),
+        }
+    }
+
+    fn register(&mut self, context: &cubeb::Context, server: &Rc<RefCell<CubebServerCallbacks>>) {
+        if self
+            .servers
+            .iter()
+            .find(|s| Rc::ptr_eq(s, server))
+            .is_none()
+        {
+            self.servers.push(server.clone());
+        }
+        self.update(context);
+    }
+
+    fn unregister(&mut self, context: &cubeb::Context, server: &Rc<RefCell<CubebServerCallbacks>>) {
+        self.servers
+            .retain(|s| !(Rc::ptr_eq(&s, server) && s.borrow().devtype.is_empty()));
+        self.update(context);
+    }
+
+    fn update(&mut self, context: &cubeb::Context) {
+        let mut devtype = cubeb::DeviceType::empty();
+        for s in &self.servers {
+            devtype |= s.borrow().devtype;
+        }
+        for &dir in &[cubeb::DeviceType::INPUT, cubeb::DeviceType::OUTPUT] {
+            match (devtype.contains(dir), self.devtype.contains(dir)) {
+                (true, false) => self.internal_register(context, dir, true),
+                (false, true) => self.internal_register(context, dir, false),
+                _ => {}
+            }
+        }
+    }
+
+    fn internal_register(
+        &mut self,
+        context: &cubeb::Context,
+        devtype: cubeb::DeviceType,
+        enable: bool,
+    ) {
+        let user_ptr = if enable {
+            self as *const CubebDeviceCollectionManager as *mut c_void
+        } else {
+            std::ptr::null_mut()
+        };
+        for &(dir, cb) in &[
+            (
+                cubeb::DeviceType::INPUT,
+                device_collection_changed_input_cb_c as _,
+            ),
+            (
+                cubeb::DeviceType::OUTPUT,
+                device_collection_changed_output_cb_c as _,
+            ),
+        ] {
+            if devtype.contains(dir) {
+                assert_eq!(self.devtype.contains(dir), !enable);
+                unsafe {
+                    context
+                        .register_device_collection_changed(
+                            dir,
+                            if enable { Some(cb) } else { None },
+                            user_ptr,
+                        )
+                        .expect("devcol register failed");
+                }
+                if enable {
+                    self.devtype.insert(dir);
+                } else {
+                    self.devtype.remove(dir);
+                }
+            }
+        }
+    }
+
+    // Warning: this is called from an internal cubeb thread, so we must not mutate unprotected shared state.
+    unsafe fn device_collection_changed_callback(&self, device_type: ffi::cubeb_device_type) {
+        self.servers.iter().for_each(|server| {
+            if server
+                .borrow()
+                .devtype
+                .contains(cubeb::DeviceType::from_bits_truncate(device_type))
+            {
+                server
+                    .borrow_mut()
+                    .device_collection_changed_callback(device_type)
+            }
+        });
+    }
+}
+
+struct CubebContextState {
+    context: cubeb::Result<cubeb::Context>,
+    manager: CubebDeviceCollectionManager,
+}
+
+type ContextKey = RefCell<Option<CubebContextState>>;
+thread_local!(static CONTEXT_KEY:ContextKey = RefCell::new(None));
 
 fn with_local_context<T, F>(f: F) -> T
 where
-    F: FnOnce(&cubeb::Result<cubeb::Context>) -> T,
+    F: FnOnce(&cubeb::Result<cubeb::Context>, &mut CubebDeviceCollectionManager) -> T,
 {
     CONTEXT_KEY.with(|k| {
-        let mut context = k.borrow_mut();
-        if context.is_none() {
+        let mut state = k.borrow_mut();
+        if state.is_none() {
             let params = super::G_CUBEB_CONTEXT_PARAMS.lock().unwrap();
             let context_name = Some(params.context_name.as_c_str());
             let backend_name = if let Some(ref name) = params.backend_name {
@@ -52,24 +161,34 @@ where
             } else {
                 None
             };
-            *context = Some(cubeb::Context::init(context_name, backend_name));
+            let context = cubeb::Context::init(context_name, backend_name);
+            let manager = CubebDeviceCollectionManager::new();
+            *state = Some(CubebContextState { context, manager });
         }
-        f(context.as_ref().unwrap())
+        let state = state.as_mut().unwrap();
+        f(&state.context, &mut state.manager)
     })
 }
 
-// TODO: Remove and let caller allocate based on cubeb backend requirements.
-const SHM_AREA_SIZE: usize = 2 * 1024 * 1024;
-
 // The size in which the stream slab is grown.
 const STREAM_CONN_CHUNK_SIZE: usize = 64;
 
+struct DeviceCollectionClient;
+
+impl rpc::Client for DeviceCollectionClient {
+    type Request = DeviceCollectionReq;
+    type Response = DeviceCollectionResp;
+    type Transport =
+        Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Request, Self::Response>>;
+}
+
 struct CallbackClient;
 
 impl rpc::Client for CallbackClient {
     type Request = CallbackReq;
     type Response = CallbackResp;
-    type Transport = Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Request, Self::Response>>;
+    type Transport =
+        Framed<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Request, Self::Response>>;
 }
 
 struct ServerStreamCallbacks {
@@ -87,17 +206,23 @@ struct ServerStreamCallbacks {
 
 impl ServerStreamCallbacks {
     fn data_callback(&mut self, input: &[u8], output: &mut [u8], nframes: isize) -> isize {
-        trace!("Stream data callback: {} {} {}", nframes, input.len(), output.len());
+        trace!(
+            "Stream data callback: {} {} {}",
+            nframes,
+            input.len(),
+            output.len()
+        );
 
         self.input_shm.write(input).unwrap();
 
         let r = self
             .rpc
             .call(CallbackReq::Data {
-                nframes: nframes,
+                nframes,
                 input_frame_size: self.input_frame_size as usize,
                 output_frame_size: self.output_frame_size as usize,
-            }).wait();
+            })
+            .wait();
 
         match r {
             Ok(CallbackResp::Data(frames)) => {
@@ -121,7 +246,18 @@ impl ServerStreamCallbacks {
         match r {
             Ok(CallbackResp::State) => {}
             _ => {
-                debug!("Unexpected message {:?} during callback", r);
+                debug!("Unexpected message {:?} during state callback", r);
+            }
+        }
+    }
+
+    fn device_change_callback(&mut self) {
+        trace!("Stream device change callback");
+        let r = self.rpc.call(CallbackReq::DeviceChange).wait();
+        match r {
+            Ok(CallbackResp::DeviceChange) => {}
+            _ => {
+                debug!("Unexpected message {:?} during device change callback", r);
             }
         }
     }
@@ -143,38 +279,67 @@ impl Drop for ServerStream {
 
 type StreamSlab = slab::Slab<ServerStream, usize>;
 
+struct CubebServerCallbacks {
+    rpc: rpc::ClientProxy<DeviceCollectionReq, DeviceCollectionResp>,
+    devtype: cubeb::DeviceType,
+}
+
+impl CubebServerCallbacks {
+    fn device_collection_changed_callback(&mut self, device_type: ffi::cubeb_device_type) {
+        // TODO: Assert device_type is in devtype.
+        debug!(
+            "Sending device collection ({:?}) changed event",
+            device_type
+        );
+        let _ = self
+            .rpc
+            .call(DeviceCollectionReq::DeviceChange(device_type))
+            .wait();
+    }
+}
+
 pub struct CubebServer {
-    cb_remote: Remote,
+    handle: current_thread::Handle,
     streams: StreamSlab,
     remote_pid: Option<u32>,
+    cbs: Option<Rc<RefCell<CubebServerCallbacks>>>,
 }
 
 impl rpc::Server for CubebServer {
     type Request = ServerMessage;
     type Response = ClientMessage;
     type Future = FutureResult<Self::Response, ()>;
-    type Transport = FramedWithPlatformHandles<audioipc::AsyncMessageStream, LengthDelimitedCodec<Self::Response, Self::Request>>;
+    type Transport = FramedWithPlatformHandles<
+        audioipc::AsyncMessageStream,
+        LengthDelimitedCodec<Self::Response, Self::Request>,
+    >;
 
     fn process(&mut self, req: Self::Request) -> Self::Future {
-        let resp = with_local_context(|context| match *context {
+        let resp = with_local_context(|context, manager| match *context {
             Err(_) => error(cubeb::Error::error()),
-            Ok(ref context) => self.process_msg(context, &req),
+            Ok(ref context) => self.process_msg(context, manager, &req),
         });
         future::ok(resp)
     }
 }
 
 impl CubebServer {
-    pub fn new(cb_remote: Remote) -> Self {
+    pub fn new(handle: current_thread::Handle) -> Self {
         CubebServer {
-            cb_remote: cb_remote,
+            handle,
             streams: StreamSlab::with_capacity(STREAM_CONN_CHUNK_SIZE),
             remote_pid: None,
+            cbs: None,
         }
     }
 
     // Process a request coming from the client.
-    fn process_msg(&mut self, context: &cubeb::Context, msg: &ServerMessage) -> ClientMessage {
+    fn process_msg(
+        &mut self,
+        context: &cubeb::Context,
+        manager: &mut CubebDeviceCollectionManager,
+        msg: &ServerMessage,
+    ) -> ClientMessage {
         let resp: ClientMessage = match *msg {
             ServerMessage::ClientConnect(pid) => {
                 self.remote_pid = Some(pid);
@@ -187,7 +352,9 @@ impl CubebServer {
                 ClientMessage::ClientDisconnected
             }
 
-            ServerMessage::ContextGetBackendId => ClientMessage::ContextBackendId(),
+            ServerMessage::ContextGetBackendId => {
+                ClientMessage::ContextBackendId(context.backend_id().to_string())
+            }
 
             ServerMessage::ContextGetMaxChannelCount => context
                 .max_channel_count()
@@ -200,8 +367,8 @@ impl CubebServer {
 
                 let params = cubeb::StreamParamsBuilder::new()
                     .format(format)
-                    .rate(u32::from(params.rate))
-                    .channels(u32::from(params.channels))
+                    .rate(params.rate)
+                    .channels(params.channels)
                     .layout(layout)
                     .take();
 
@@ -221,7 +388,8 @@ impl CubebServer {
                 .map(|devices| {
                     let v: Vec<DeviceInfo> = devices.iter().map(|i| i.as_ref().into()).collect();
                     ClientMessage::ContextEnumeratedDevices(v)
-                }).unwrap_or_else(error),
+                })
+                .unwrap_or_else(error),
 
             ServerMessage::StreamInit(ref params) => self
                 .process_stream_init(context, params)
@@ -279,6 +447,76 @@ impl CubebServer {
                 .current_device()
                 .map(|device| ClientMessage::StreamCurrentDevice(Device::from(device)))
                 .unwrap_or_else(error),
+
+            ServerMessage::StreamRegisterDeviceChangeCallback(stm_tok, enable) => self.streams
+                [stm_tok]
+                .stream
+                .register_device_changed_callback(if enable {
+                    Some(device_change_cb_c)
+                } else {
+                    None
+                })
+                .map(|_| ClientMessage::StreamRegisterDeviceChangeCallback)
+                .unwrap_or_else(error),
+
+            ServerMessage::ContextSetupDeviceCollectionCallback => {
+                if let Ok((stm1, stm2)) = MessageStream::anonymous_ipc_pair() {
+                    debug!("Created device collection RPC pair: {:?}-{:?}", stm1, stm2);
+
+                    // This code is currently running on the Client/Server RPC
+                    // handling thread.  We need to move the registration of the
+                    // bind_client to the callback RPC handling thread.  This is
+                    // done by spawning a future on `handle`.
+
+                    let (tx, rx) = oneshot::channel();
+                    self.handle
+                        .spawn(futures::future::lazy(move || {
+                            let handle = reactor::Handle::default();
+                            let stream = stm2.into_tokio_ipc(&handle).unwrap();
+                            let transport = framed(stream, Default::default());
+                            let rpc = rpc::bind_client::<DeviceCollectionClient>(transport);
+                            drop(tx.send(rpc));
+                            Ok(())
+                        }))
+                        .expect("Failed to spawn DeviceCollectionClient");
+
+                    // TODO: The lowest comms layer expects exactly 3 PlatformHandles, but we only
+                    // need one here.  Send some dummy handles over for the other side to discard.
+                    let (dummy1, dummy2) =
+                        MessageStream::anonymous_ipc_pair().expect("need dummy IPC pair");
+                    if let Ok(rpc) = rx.wait() {
+                        self.cbs = Some(Rc::new(RefCell::new(CubebServerCallbacks {
+                            rpc,
+                            devtype: cubeb::DeviceType::empty(),
+                        })));
+                        let fds = RegisterDeviceCollectionChanged {
+                            platform_handles: [
+                                PlatformHandle::from(stm1),
+                                PlatformHandle::from(dummy1),
+                                PlatformHandle::from(dummy2),
+                            ],
+                            target_pid: self.remote_pid.unwrap(),
+                        };
+
+                        ClientMessage::ContextSetupDeviceCollectionCallback(fds)
+                    } else {
+                        warn!("Failed to setup RPC client");
+                        error(cubeb::Error::error())
+                    }
+                } else {
+                    warn!("Failed to create RPC pair");
+                    error(cubeb::Error::error())
+                }
+            }
+
+            ServerMessage::ContextRegisterDeviceCollectionChanged(device_type, enable) => self
+                .process_register_device_collection_changed(
+                    context,
+                    manager,
+                    cubeb::DeviceType::from_bits_truncate(device_type),
+                    enable,
+                )
+                .unwrap_or_else(error),
         };
 
         trace!("process_msg: req={:?}, resp={:?}", msg, resp);
@@ -286,6 +524,30 @@ impl CubebServer {
         resp
     }
 
+    fn process_register_device_collection_changed(
+        &mut self,
+        context: &cubeb::Context,
+        manager: &mut CubebDeviceCollectionManager,
+        devtype: cubeb::DeviceType,
+        enable: bool,
+    ) -> cubeb::Result<ClientMessage> {
+        if devtype == cubeb::DeviceType::UNKNOWN {
+            return Err(cubeb::Error::invalid_parameter());
+        }
+
+        assert!(self.cbs.is_some());
+        let cbs = self.cbs.as_ref().unwrap();
+
+        if enable {
+            cbs.borrow_mut().devtype.insert(devtype);
+            manager.register(context, cbs);
+        } else {
+            cbs.borrow_mut().devtype.remove(devtype);
+            manager.unregister(context, cbs);
+        }
+        Ok(ClientMessage::ContextRegisteredDeviceCollectionChanged)
+    }
+
     // Stream init is special, so it's been separated from process_msg.
     fn process_stream_init(
         &mut self,
@@ -306,7 +568,8 @@ impl CubebServer {
                     };
                     let channel_count = p.channels as u16;
                     sample_size * channel_count
-                }).unwrap_or(0u16)
+                })
+                .unwrap_or(0u16)
         }
 
         // Create the callback handling struct which is attached the cubeb stream.
@@ -316,28 +579,26 @@ impl CubebServer {
         let (stm1, stm2) = MessageStream::anonymous_ipc_pair()?;
         debug!("Created callback pair: {:?}-{:?}", stm1, stm2);
         let (input_shm, input_file) =
-            SharedMemWriter::new(&audioipc::get_shm_path("input"), SHM_AREA_SIZE)?;
+            SharedMemWriter::new(&audioipc::get_shm_path("input"), audioipc::SHM_AREA_SIZE)?;
         let (output_shm, output_file) =
-            SharedMemReader::new(&audioipc::get_shm_path("output"), SHM_AREA_SIZE)?;
+            SharedMemReader::new(&audioipc::get_shm_path("output"), audioipc::SHM_AREA_SIZE)?;
 
         // This code is currently running on the Client/Server RPC
         // handling thread.  We need to move the registration of the
         // bind_client to the callback RPC handling thread.  This is
-        // done by spawning a future on cb_remote.
-
-        let id = core::handle().id();
+        // done by spawning a future on `handle`.
 
         let (tx, rx) = oneshot::channel();
-        self.cb_remote.spawn(move |handle| {
-            // Ensure we're running on a loop different to the one
-            // invoking spawn_fn.
-            assert_ne!(id, handle.id());
-            let stream = stm2.into_tokio_ipc(handle).unwrap();
-            let transport = framed(stream, Default::default());
-            let rpc = rpc::bind_client::<CallbackClient>(transport, handle);
-            drop(tx.send(rpc));
-            Ok(())
-        });
+        self.handle
+            .spawn(futures::future::lazy(move || {
+                let handle = reactor::Handle::default();
+                let stream = stm2.into_tokio_ipc(&handle).unwrap();
+                let transport = framed(stream, Default::default());
+                let rpc = rpc::bind_client::<CallbackClient>(transport);
+                drop(tx.send(rpc));
+                Ok(())
+            }))
+            .expect("Failed to spawn CallbackClient");
 
         let rpc: rpc::ClientProxy<CallbackReq, CallbackResp> = match rx.wait() {
             Ok(rpc) => rpc,
@@ -384,7 +645,8 @@ impl CubebServer {
                     Some(data_cb_c),
                     Some(state_cb_c),
                     user_ptr,
-                ).and_then(|stream| {
+                )
+                .and_then(|stream| {
                     if !self.streams.has_available() {
                         trace!(
                             "server connection ran out of stream slots. reserving {} more.",
@@ -401,7 +663,8 @@ impl CubebServer {
                                 .insert(ServerStream {
                                     stream: ManuallyDrop::new(stream),
                                     cbs: ManuallyDrop::new(cbs),
-                                }).index()
+                                })
+                                .index()
                         }
                         None => {
                             // TODO: Turn into error
@@ -416,9 +679,10 @@ impl CubebServer {
                             PlatformHandle::from(input_file),
                             PlatformHandle::from(output_file),
                         ],
-                        target_pid: self.remote_pid.unwrap()
+                        target_pid: self.remote_pid.unwrap(),
                     }))
-                }).map_err(|e| e.into())
+                })
+                .map_err(|e| e.into())
         }
     }
 }
@@ -436,13 +700,13 @@ unsafe extern "C" fn data_cb_c(
         let input = if input_buffer.is_null() {
             &[]
         } else {
-            let nbytes = nframes * cbs.input_frame_size as c_long;
+            let nbytes = nframes * c_long::from(cbs.input_frame_size);
             slice::from_raw_parts(input_buffer as *const u8, nbytes as usize)
         };
         let output: &mut [u8] = if output_buffer.is_null() {
             &mut []
         } else {
-            let nbytes = nframes * cbs.output_frame_size as c_long;
+            let nbytes = nframes * c_long::from(cbs.output_frame_size);
             slice::from_raw_parts_mut(output_buffer as *mut u8, nbytes as usize)
         };
         cbs.data_callback(input, output, nframes as isize) as c_long
@@ -462,3 +726,33 @@ unsafe extern "C" fn state_cb_c(
     });
     ok.expect("State callback panicked");
 }
+
+unsafe extern "C" fn device_change_cb_c(user_ptr: *mut c_void) {
+    let ok = panic::catch_unwind(|| {
+        let cbs = &mut *(user_ptr as *mut ServerStreamCallbacks);
+        cbs.device_change_callback();
+    });
+    ok.expect("Device change callback panicked");
+}
+
+unsafe extern "C" fn device_collection_changed_input_cb_c(
+    _: *mut ffi::cubeb,
+    user_ptr: *mut c_void,
+) {
+    let ok = panic::catch_unwind(|| {
+        let manager = &mut *(user_ptr as *mut CubebDeviceCollectionManager);
+        manager.device_collection_changed_callback(ffi::CUBEB_DEVICE_TYPE_INPUT);
+    });
+    ok.expect("Collection changed (input) callback panicked");
+}
+
+unsafe extern "C" fn device_collection_changed_output_cb_c(
+    _: *mut ffi::cubeb,
+    user_ptr: *mut c_void,
+) {
+    let ok = panic::catch_unwind(|| {
+        let manager = &mut *(user_ptr as *mut CubebDeviceCollectionManager);
+        manager.device_collection_changed_callback(ffi::CUBEB_DEVICE_TYPE_OUTPUT);
+    });
+    ok.expect("Collection changed (output) callback panicked");
+}