зеркало из https://github.com/mozilla/gecko-dev.git
150 строки
3.3 KiB
C++
150 строки
3.3 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DBusWatcher.h"
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#include "mozilla/unused.h"
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#include "nsThreadUtils.h"
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namespace mozilla {
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namespace ipc {
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DBusWatcher::DBusWatcher(DBusConnection* aConnection, DBusWatch* aWatch)
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: mConnection(aConnection)
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, mWatch(aWatch)
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{
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MOZ_ASSERT(mConnection);
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MOZ_ASSERT(mWatch);
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}
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DBusWatcher::~DBusWatcher()
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{ }
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DBusConnection*
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DBusWatcher::GetConnection()
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{
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return mConnection;
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}
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void
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DBusWatcher::StartWatching()
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{
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MOZ_ASSERT(!NS_IsMainThread());
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auto flags = dbus_watch_get_flags(mWatch);
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if (!(flags & (DBUS_WATCH_READABLE|DBUS_WATCH_WRITABLE))) {
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return;
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}
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auto ioLoop = MessageLoopForIO::current();
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auto fd = dbus_watch_get_unix_fd(mWatch);
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if (flags & DBUS_WATCH_READABLE) {
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ioLoop->WatchFileDescriptor(fd, true, MessageLoopForIO::WATCH_READ,
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&mReadWatcher, this);
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}
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if (flags & DBUS_WATCH_WRITABLE) {
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ioLoop->WatchFileDescriptor(fd, true, MessageLoopForIO::WATCH_WRITE,
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&mWriteWatcher, this);
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}
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}
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void
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DBusWatcher::StopWatching()
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{
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MOZ_ASSERT(!NS_IsMainThread());
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auto flags = dbus_watch_get_flags(mWatch);
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if (flags & DBUS_WATCH_READABLE) {
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mReadWatcher.StopWatchingFileDescriptor();
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}
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if (flags & DBUS_WATCH_WRITABLE) {
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mWriteWatcher.StopWatchingFileDescriptor();
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}
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}
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// DBus utility functions, used as function pointers in DBus setup
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void
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DBusWatcher::FreeFunction(void* aData)
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{
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UniquePtr<DBusWatcher> watcher(static_cast<DBusWatcher*>(aData));
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}
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dbus_bool_t
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DBusWatcher::AddWatchFunction(DBusWatch* aWatch, void* aData)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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auto connection = static_cast<DBusConnection*>(aData);
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UniquePtr<DBusWatcher> dbusWatcher =
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MakeUnique<DBusWatcher>(connection, aWatch);
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dbus_watch_set_data(aWatch, dbusWatcher.get(), DBusWatcher::FreeFunction);
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if (dbus_watch_get_enabled(aWatch)) {
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dbusWatcher->StartWatching();
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}
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Unused << dbusWatcher.release(); // picked up in |FreeFunction|
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return TRUE;
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}
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void
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DBusWatcher::RemoveWatchFunction(DBusWatch* aWatch, void* aData)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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auto dbusWatcher = static_cast<DBusWatcher*>(dbus_watch_get_data(aWatch));
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dbusWatcher->StopWatching();
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}
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void
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DBusWatcher::ToggleWatchFunction(DBusWatch* aWatch, void* aData)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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auto dbusWatcher = static_cast<DBusWatcher*>(dbus_watch_get_data(aWatch));
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if (dbus_watch_get_enabled(aWatch)) {
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dbusWatcher->StartWatching();
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} else {
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dbusWatcher->StopWatching();
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}
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}
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// I/O-loop callbacks
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void
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DBusWatcher::OnFileCanReadWithoutBlocking(int aFd)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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dbus_watch_handle(mWatch, DBUS_WATCH_READABLE);
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DBusDispatchStatus dbusDispatchStatus;
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do {
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dbusDispatchStatus = dbus_connection_dispatch(mConnection);
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} while (dbusDispatchStatus == DBUS_DISPATCH_DATA_REMAINS);
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}
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void
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DBusWatcher::OnFileCanWriteWithoutBlocking(int aFd)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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dbus_watch_handle(mWatch, DBUS_WATCH_WRITABLE);
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}
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} // namespace ipc
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} // namespace mozilla
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