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audio/internal/readerdriver: Bug fix: AudioQueueStop might invoke the callback and then caused deadlock

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This commit is contained in:
Hajime Hoshi 2021-05-09 21:07:39 +09:00
parent 015475ad2c
commit 6644e43025
1 changed files with 12 additions and 2 deletions
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14
audio/internal/readerdriver/driver_darwin.go
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@ -435,8 +435,9 @@ func (p *playerImpl) Reset() {
return
}
// AudioQueueReset invokes the callback directry.
q := p.audioQueue
p.cond.L.Unlock()
osstatus := C.AudioQueueReset(p.audioQueue)
osstatus := C.AudioQueueReset(q)
p.cond.L.Lock()
if osstatus != C.noErr && p.err == nil {
p.setErrorImpl(fmt.Errorf("readerdriver: AudioQueueReset failed: %d", osstatus))
@ -519,10 +520,19 @@ func (p *playerImpl) closeImpl(reuseLater bool) error {
if p.audioQueue != nil {
// Even if reuseLater is true, AudioQueuePause is not efficient for reusing.
// AudioQueueStart takes long if the AudioQueueStop is not called.
if osstatus := C.AudioQueueStop(p.audioQueue, C.true); osstatus != C.noErr && p.err != nil {
// AudioQueueStop might invoke AudioQueueReset. Unlock the mutex here to avoid a deadlock.
q := p.audioQueue
p.cond.L.Unlock()
osstatus := C.AudioQueueStop(q, C.true)
p.cond.L.Lock()
if osstatus != C.noErr && p.err != nil {
// setErrorImpl calls closeImpl. Do not call this.
p.err = fmt.Errorf("readerdriver: AudioQueueStop failed: %d", osstatus)
}
// All the AudioQueueBuffers are already dequeued. It is safe to dispose the AudioQueue and its buffers.
if err := p.context.audioQueuePool.Put(p.audioQueue); err != nil && p.err != nil {
p.err = err
}