RTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
{
uint32_t fNew;
uint32_t fOld;
/*
* Validate input.
*/
PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
if (!pThis)
return VERR_INVALID_PARAMETER;
AssertPtrReturn(pThis, VERR_INVALID_PARAMETER);
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
rtR0SemEventMultiBsdRetain(pThis);
/*
* Signal the event object. The cause of the parnoia here is racing to try
* deal with racing RTSemEventMultiSignal calls (should probably be
* forbidden, but it's relatively easy to handle).
*/
do
{
fNew = fOld = ASMAtomicUoReadU32(&pThis->fStateAndGen);
fNew += 1 << RTSEMEVENTMULTIBSD_GEN_SHIFT;
fNew |= RTSEMEVENTMULTIBSD_STATE_MASK;
}
while (!ASMAtomicCmpXchgU32(&pThis->fStateAndGen, fNew, fOld));
rtR0SemBsdBroadcast(pThis);
rtR0SemEventMultiBsdRelease(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTSemEventDestroy(RTSEMEVENT hEventSem)
{
/*
* Validate input.
*/
PRTSEMEVENTINTERNAL pThis = hEventSem;
if (pThis == NIL_RTSEMEVENT)
return VINF_SUCCESS;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
Assert(pThis->cRefs > 0);
/*
* Invalidate it and signal the object just in case.
*/
ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
ASMAtomicWriteU32(&pThis->fState, 0);
rtR0SemBsdBroadcast(pThis);
rtR0SemEventBsdRelease(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
{
/*
* Validate input.
*/
PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
if (pThis == NIL_RTSEMEVENTMULTI)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_PARAMETER);
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
Assert(pThis->cRefs > 0);
/*
* Invalidate it and signal the object just in case.
*/
ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENTMULTI_MAGIC);
ASMAtomicAndU32(&pThis->fStateAndGen, RTSEMEVENTMULTIBSD_GEN_MASK);
rtR0SemBsdBroadcast(pThis);
rtR0SemEventMultiBsdRelease(pThis);
return VINF_SUCCESS;
}