AuroraMiddleware/AuroraOpenALSoft
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Do an atomic compare-exchange on the global context when destroying a context

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This commit is contained in:
Chris Robinson 2011-09-02 02:57:21 -07:00
parent 108b43458f
commit 9080d5fda0
2 changed files with 15 additions and 6 deletions
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9
Alc/ALc.c
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@ -2147,17 +2147,14 @@ ALC_API ALCvoid ALC_APIENTRY alcDestroyContext(ALCcontext *context)
}
UnlockDevice(Device);
if(CompExchangePtr((void**)&GlobalContext, context, NULL))
ALCcontext_DecRef(context);
if(Device->NumContexts == 0)
{
ALCdevice_StopPlayback(Device);
Device->Flags &= ~DEVICE_RUNNING;
}
if(GlobalContext == context)
{
GlobalContext = NULL;
ALCcontext_DecRef(context);
}
UnlockLists();
ALCcontext_DecRef(context);

12
OpenAL32/Include/alMain.h
View File

@ -243,6 +243,10 @@ static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int new
{
return __sync_bool_compare_and_swap(ptr, oldval, newval);
}
static __inline ALboolean CompExchangePtr(void *volatile*ptr, void *oldval, void *newval)
{
return __sync_bool_compare_and_swap(ptr, oldval, newval);
}
#elif defined(_WIN32)
@ -274,6 +278,10 @@ static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int new
} u = { ptr };
return InterlockedCompareExchange(u.l, newval, oldval) == oldval;
}
static __inline void *CompExchangePtr(void *volatile*ptr, void *oldval, void *newval)
{
return InterlockedCompareExchangePointer(ptr, newval, oldval);
}
#elif defined(__APPLE__)
@ -306,6 +314,10 @@ static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int new
{
return OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr);
}
static __inline ALboolean CompExchangeInt(void *volatile*ptr, void *oldval, void *newval)
{
return OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr);
}
#else
#error "No atomic functions available on this platform!"