RTDECL(int) RTCritSectDelete(PRTCRITSECT pCritSect)
{
/*
* Assert free waiters and so on.
*/
Assert(pCritSect);
Assert(pCritSect->u32Magic == RTCRITSECT_MAGIC);
Assert(pCritSect->cNestings == 0);
Assert(pCritSect->cLockers == -1);
Assert(pCritSect->NativeThreadOwner == NIL_RTNATIVETHREAD);
/*
* Invalidate the structure and free the mutex.
* In case someone is waiting we'll signal the semaphore cLockers + 1 times.
*/
ASMAtomicWriteU32(&pCritSect->u32Magic, ~RTCRITSECT_MAGIC);
pCritSect->fFlags = 0;
pCritSect->cNestings = 0;
pCritSect->NativeThreadOwner= NIL_RTNATIVETHREAD;
RTSEMEVENT EventSem = pCritSect->EventSem;
pCritSect->EventSem = NIL_RTSEMEVENT;
while (pCritSect->cLockers-- >= 0)
RTSemEventSignal(EventSem);
ASMAtomicWriteS32(&pCritSect->cLockers, -1);
int rc = RTSemEventDestroy(EventSem);
AssertRC(rc);
RTLockValidatorRecExclDestroy(&pCritSect->pValidatorRec);
return rc;
}
RTDECL(int) RTCritSectInitEx(PRTCRITSECT pCritSect, uint32_t fFlags, RTLOCKVALCLASS hClass, uint32_t uSubClass,
const char *pszNameFmt, ...)
{
AssertReturn(!(fFlags & ~(RTCRITSECT_FLAGS_NO_NESTING | RTCRITSECT_FLAGS_NO_LOCK_VAL | RTCRITSECT_FLAGS_BOOTSTRAP_HACK | RTCRITSECT_FLAGS_NOP)),
VERR_INVALID_PARAMETER);
/*
* Initialize the structure and
*/
pCritSect->u32Magic = RTCRITSECT_MAGIC;
pCritSect->fFlags = fFlags;
pCritSect->cNestings = 0;
pCritSect->cLockers = -1;
pCritSect->NativeThreadOwner = NIL_RTNATIVETHREAD;
pCritSect->pValidatorRec = NULL;
int rc = VINF_SUCCESS;
#ifdef RTCRITSECT_STRICT
if (!(fFlags & (RTCRITSECT_FLAGS_BOOTSTRAP_HACK | RTCRITSECT_FLAGS_NOP)))
{
if (!pszNameFmt)
{
static uint32_t volatile s_iCritSectAnon = 0;
rc = RTLockValidatorRecExclCreate(&pCritSect->pValidatorRec, hClass, uSubClass, pCritSect,
!(fFlags & RTCRITSECT_FLAGS_NO_LOCK_VAL),
"RTCritSect-%u", ASMAtomicIncU32(&s_iCritSectAnon) - 1);
}
else
{
va_list va;
va_start(va, pszNameFmt);
rc = RTLockValidatorRecExclCreateV(&pCritSect->pValidatorRec, hClass, uSubClass, pCritSect,
!(fFlags & RTCRITSECT_FLAGS_NO_LOCK_VAL), pszNameFmt, va);
va_end(va);
}
}
#endif
if (RT_SUCCESS(rc))
{
rc = RTSemEventCreateEx(&pCritSect->EventSem,
fFlags & RTCRITSECT_FLAGS_BOOTSTRAP_HACK
? RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK
: RTSEMEVENT_FLAGS_NO_LOCK_VAL,
NIL_RTLOCKVALCLASS,
NULL);
if (RT_SUCCESS(rc))
return VINF_SUCCESS;
RTLockValidatorRecExclDestroy(&pCritSect->pValidatorRec);
}
AssertRC(rc);
pCritSect->EventSem = NULL;
pCritSect->u32Magic = (uint32_t)rc;
return rc;
}
/**
* Deletes one critical section.
*
* @returns Return code from RTCritSectDelete.
*
* @param pVM Pointer to the VM.
* @param pCritSect The critical section.
* @param pPrev The previous critical section in the list.
* @param fFinal Set if this is the final call and statistics shouldn't be deregistered.
*
* @remarks Caller must have entered the ListCritSect.
*/
static int pdmR3CritSectDeleteOne(PVM pVM, PUVM pUVM, PPDMCRITSECTINT pCritSect, PPDMCRITSECTINT pPrev, bool fFinal)
{
/*
* Assert free waiters and so on (c&p from RTCritSectDelete).
*/
Assert(pCritSect->Core.u32Magic == RTCRITSECT_MAGIC);
Assert(pCritSect->Core.cNestings == 0);
Assert(pCritSect->Core.cLockers == -1);
Assert(pCritSect->Core.NativeThreadOwner == NIL_RTNATIVETHREAD);
Assert(RTCritSectIsOwner(&pUVM->pdm.s.ListCritSect));
/*
* Unlink it.
*/
if (pPrev)
pPrev->pNext = pCritSect->pNext;
else
pUVM->pdm.s.pCritSects = pCritSect->pNext;
/*
* Delete it (parts taken from RTCritSectDelete).
* In case someone is waiting we'll signal the semaphore cLockers + 1 times.
*/
ASMAtomicWriteU32(&pCritSect->Core.u32Magic, 0);
SUPSEMEVENT hEvent = (SUPSEMEVENT)pCritSect->Core.EventSem;
pCritSect->Core.EventSem = NIL_RTSEMEVENT;
while (pCritSect->Core.cLockers-- >= 0)
SUPSemEventSignal(pVM->pSession, hEvent);
ASMAtomicWriteS32(&pCritSect->Core.cLockers, -1);
int rc = SUPSemEventClose(pVM->pSession, hEvent);
AssertRC(rc);
RTLockValidatorRecExclDestroy(&pCritSect->Core.pValidatorRec);
pCritSect->pNext = NULL;
pCritSect->pvKey = NULL;
pCritSect->pVMR3 = NULL;
pCritSect->pVMR0 = NIL_RTR0PTR;
pCritSect->pVMRC = NIL_RTRCPTR;
RTStrFree((char *)pCritSect->pszName);
pCritSect->pszName = NULL;
if (!fFinal)
{
STAMR3Deregister(pVM, &pCritSect->StatContentionRZLock);
STAMR3Deregister(pVM, &pCritSect->StatContentionRZUnlock);
STAMR3Deregister(pVM, &pCritSect->StatContentionR3);
#ifdef VBOX_WITH_STATISTICS
STAMR3Deregister(pVM, &pCritSect->StatLocked);
#endif
}
return rc;
}
RTDECL(int) RTCritSectRwInitEx(PRTCRITSECTRW pThis, uint32_t fFlags,
RTLOCKVALCLASS hClass, uint32_t uSubClass, const char *pszNameFmt, ...)
{
int rc;
AssertReturn(!(fFlags & ~( RTCRITSECT_FLAGS_NO_NESTING | RTCRITSECT_FLAGS_NO_LOCK_VAL | RTCRITSECT_FLAGS_BOOTSTRAP_HACK
| RTCRITSECT_FLAGS_NOP )),
VERR_INVALID_PARAMETER);
/*
* Initialize the structure, allocate the lock validator stuff and sems.
*/
pThis->u32Magic = RTCRITSECTRW_MAGIC_DEAD;
pThis->fNeedReset = false;
#ifdef IN_RING0
pThis->fFlags = (uint16_t)(fFlags | RTCRITSECT_FLAGS_RING0);
#else
pThis->fFlags = (uint16_t)(fFlags & ~RTCRITSECT_FLAGS_RING0);
#endif
pThis->u64State = 0;
pThis->hNativeWriter = NIL_RTNATIVETHREAD;
pThis->cWriterReads = 0;
pThis->cWriteRecursions = 0;
pThis->hEvtWrite = NIL_RTSEMEVENT;
pThis->hEvtRead = NIL_RTSEMEVENTMULTI;
pThis->pValidatorWrite = NULL;
pThis->pValidatorRead = NULL;
#if HC_ARCH_BITS == 32
pThis->HCPtrPadding = NIL_RTHCPTR;
#endif
#ifdef RTCRITSECTRW_STRICT
bool const fLVEnabled = !(fFlags & RTCRITSECT_FLAGS_NO_LOCK_VAL);
if (!pszNameFmt)
{
static uint32_t volatile s_iAnon = 0;
uint32_t i = ASMAtomicIncU32(&s_iAnon) - 1;
rc = RTLockValidatorRecExclCreate(&pThis->pValidatorWrite, hClass, uSubClass, pThis,
fLVEnabled, "RTCritSectRw-%u", i);
if (RT_SUCCESS(rc))
rc = RTLockValidatorRecSharedCreate(&pThis->pValidatorRead, hClass, uSubClass, pThis,
false /*fSignaller*/, fLVEnabled, "RTCritSectRw-%u", i);
}
else
{
va_list va;
va_start(va, pszNameFmt);
rc = RTLockValidatorRecExclCreateV(&pThis->pValidatorWrite, hClass, uSubClass, pThis,
fLVEnabled, pszNameFmt, va);
va_end(va);
if (RT_SUCCESS(rc))
{
va_start(va, pszNameFmt);
RTLockValidatorRecSharedCreateV(&pThis->pValidatorRead, hClass, uSubClass, pThis,
false /*fSignaller*/, fLVEnabled, pszNameFmt, va);
va_end(va);
}
}
if (RT_SUCCESS(rc))
rc = RTLockValidatorRecMakeSiblings(&pThis->pValidatorWrite->Core, &pThis->pValidatorRead->Core);
if (RT_SUCCESS(rc))
#endif
{
rc = RTSemEventMultiCreate(&pThis->hEvtRead);
if (RT_SUCCESS(rc))
{
rc = RTSemEventCreate(&pThis->hEvtWrite);
if (RT_SUCCESS(rc))
{
pThis->u32Magic = RTCRITSECTRW_MAGIC;
return VINF_SUCCESS;
}
RTSemEventMultiDestroy(pThis->hEvtRead);
}
}
#ifdef RTCRITSECTRW_STRICT
RTLockValidatorRecSharedDestroy(&pThis->pValidatorRead);
RTLockValidatorRecExclDestroy(&pThis->pValidatorWrite);
#endif
return rc;
}
