AuroraMiddleware/AuroraOpenALSoft
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Avoid locking the mixer when unqueueing buffers

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This commit is contained in:
Chris Robinson 2014-05-11 03:52:22 -07:00
parent 9f8615c670
commit b89cc3417b
1 changed files with 16 additions and 4 deletions
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20
OpenAL32/alSource.c
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@ -33,6 +33,8 @@
#include "alThunk.h"
#include "alAuxEffectSlot.h"
#include "threads.h"
enum Resampler DefaultResampler = LinearResampler;
const ALsizei ResamplerPadding[ResamplerMax] = {
@ -2223,10 +2225,20 @@ AL_API ALvoid AL_APIENTRY alSourceUnqueueBuffers(ALuint src, ALsizei nb, ALuint
OldHead = ExchangePtr((XchgPtr*)&source->queue, BufferList);
if(BufferList)
{
LockContext(context);
BufferList->prev->next = NULL;
BufferList->prev = NULL;
UnlockContext(context);
ALCdevice *device = context->Device;
RefCount count;
/* Cut the new head's link back to the old body. The mixer is robust
* enough to handle the link back going away. Once the active mix (if
* any) is complete, it's safe to finish cutting the old tail from the
* new head. */
BufferList = ExchangePtr((XchgPtr*)&BufferList->prev, NULL);
if(((count=device->MixCount)&1) != 0)
{
while(count == device->MixCount)
althrd_yield();
}
BufferList->next = NULL;
}
WriteUnlock(&source->queue_lock);