|SocketSendTask| acquires a reference to |UnixSocketConsumer| on
the main thread and releases this reference on the I/O thread;
leading to race-conditions. This patch adds
- atomicity for ref-counting of |UnixSocketConsumer|, and
- stricter tests in the destructor of this class.
UnixSocketConsumer now maintains a delay for re-establishing closed
connection. The initial delay is zero, so that the first connect call
is processed immediately. At the first failed attempt to connect, the
delay is set to ~1 second, and is increased by a factor of 2 on each
successive error until it reaches ~1 minute.
The UnixSocketConsumer code resets the delay to zero if it is lower
than the time that the connection was open. This heuristics protects
against cases where the peer establishes a connection, and closes it
shortly afterwards. Incompatible versions of rild show this behavior.
UnixSocketImpl, which mostly runs on the I/O thread, doesn't control
its reference to UnixSocketConsumer. If the connection status is
stored in UnixSocketConsumer, the I/O thread can't read it safely.
This patch duplicates the connection status in UnixSocketImpl, where
reading from the I/O thread is safe. Methods of UnixSocketImpl don't
need to access mConsumer any longer to obtain the connection status.
We used to allocate memory on the stack when reading from a file
descriptor and copied the result into an instance of UnixSocketRawData.
This patch
- cleans up the interface of UnixSocketRawData,
- removes the large stack allocation (64KiB), and
- removes the unnecessary memcpy.
Other memcpys for sending data have been moved into the constructor
of UnixSocketRawData.
--HG--
extra : rebase_source : 46ed1c73481732c3f3350bf0bedb56d376c24e98
This version of BlueZ from Code Aurora has added GOEP_PSM to Object
Push Profile service record, which means that remote devices may
connect with us via both L2CAP and RFCOMM. This patch completes
L2CAP/EL2CAP socket implementation.
After this new class is landed, communicating with other devices on
profile level should become more intuitive and reasonable. Each
Bluetooth*Manager doesn't need to inherit UnixSocketConsumer, instead,
BluetoothSocket inherits UnixSocketConsumer. That makes Bluetooth*Manager
be able to have more than 1 Bluetooth connections at a time with different
remote devices.
Kyle Huey
Ryan VanderMeulen
Thomas Zimmermann
Ben Tian
Ehsan Akhgari
Chuck Lee
Shawn Huang
Eric Chou
Matt Brubeck
Vicamo Yang
Kyle Machulis
Phil Ringnalda
Blake Kaplan
Gina Yeh