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decoder/Control: improve locking in Start() and Seek() 

Previously, both methods accessed a lot of attributes which require
mutex protection.
This commit is contained in:
Max Kellermann 2017-02-05 13:37:20 +01:00
parent e716b1f4d7
commit 43348a3e13
1 changed files with 7 additions and 2 deletions
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9
src/decoder/DecoderControl.cxx
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@ -95,6 +95,8 @@ DecoderControl::Start(DetachedSong *_song,
SongTime _start_time, SongTime _end_time,
MusicBuffer &_buffer, MusicPipe &_pipe)
{
const std::lock_guard<Mutex> protect(mutex);
assert(_song != nullptr);
assert(_pipe.IsEmpty());
@ -105,7 +107,8 @@ DecoderControl::Start(DetachedSong *_song,
buffer = &_buffer;
pipe = &_pipe;
LockSynchronousCommand(DecoderCommand::START);
ClearError();
SynchronousCommandLocked(DecoderCommand::START);
}
void
@ -127,6 +130,8 @@ DecoderControl::Stop()
void
DecoderControl::Seek(SongTime t)
{
const std::lock_guard<Mutex> protect(mutex);
assert(state != DecoderState::START);
assert(state != DecoderState::ERROR);
@ -149,7 +154,7 @@ DecoderControl::Seek(SongTime t)
seek_time = t;
seek_error = false;
LockSynchronousCommand(DecoderCommand::SEEK);
SynchronousCommandLocked(DecoderCommand::SEEK);
if (seek_error)
throw std::runtime_error("Decoder failed to seek");