RTDECL(int) RTFileAioReqCancel(RTFILEAIOREQ hReq)
{
PRTFILEAIOREQINTERNAL pReqInt = hReq;
RTFILEAIOREQ_VALID_RETURN(pReqInt);
RTFILEAIOREQ_STATE_RETURN_RC(pReqInt, SUBMITTED, VERR_FILE_AIO_NOT_SUBMITTED);
int rcBSD = aio_cancel(pReqInt->AioCB.aio_fildes, &pReqInt->AioCB);
if (rcBSD == AIO_CANCELED)
{
/*
* Decrement request count because the request will never arrive at the
* completion port.
*/
AssertMsg(VALID_PTR(pReqInt->pCtxInt),
("Invalid state. Request was canceled but wasn't submitted\n"));
ASMAtomicDecS32(&pReqInt->pCtxInt->cRequests);
pReqInt->Rc = VERR_FILE_AIO_CANCELED;
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
return VINF_SUCCESS;
}
else if (rcBSD == AIO_ALLDONE)
return VERR_FILE_AIO_COMPLETED;
else if (rcBSD == AIO_NOTCANCELED)
return VERR_FILE_AIO_IN_PROGRESS;
else
return RTErrConvertFromErrno(errno);
}
RTDECL(int) RTSemSpinMutexRelease(RTSEMSPINMUTEX hSpinMtx)
{
RTSEMSPINMUTEXINTERNAL *pThis = hSpinMtx;
RTNATIVETHREAD hSelf = RTThreadNativeSelf();
uint32_t cLockers;
RTSEMSPINMUTEXSTATE State;
bool fRc;
Assert(hSelf != NIL_RTNATIVETHREAD);
RTSEMSPINMUTEX_VALIDATE_RETURN(pThis);
/*
* Get the saved state and try release the semaphore.
*/
State = pThis->SavedState;
ASMCompilerBarrier();
ASMAtomicCmpXchgHandle(&pThis->hOwner, NIL_RTNATIVETHREAD, hSelf, fRc);
AssertMsgReturn(fRc,
("hOwner=%p hSelf=%p cLockers=%d\n", pThis->hOwner, hSelf, pThis->cLockers),
VERR_NOT_OWNER);
cLockers = ASMAtomicDecS32(&pThis->cLockers);
rtSemSpinMutexLeave(&State);
if (cLockers > 0)
{
int rc = RTSemEventSignal(pThis->hEventSem);
AssertReleaseMsg(RT_SUCCESS(rc), ("RTSemEventSignal -> %Rrc\n", rc));
}
return VINF_SUCCESS;
}
/**
* The slave DPC callback for an omni timer.
*
* @param pDpc The DPC object.
* @param pvUser Pointer to the sub-timer.
* @param SystemArgument1 Some system stuff.
* @param SystemArgument2 Some system stuff.
*/
static void _stdcall rtTimerNtOmniSlaveCallback(IN PKDPC pDpc, IN PVOID pvUser, IN PVOID SystemArgument1, IN PVOID SystemArgument2)
{
PRTTIMERNTSUBTIMER pSubTimer = (PRTTIMERNTSUBTIMER)pvUser;
PRTTIMER pTimer = pSubTimer->pParent;
AssertPtr(pTimer);
#ifdef RT_STRICT
if (KeGetCurrentIrql() < DISPATCH_LEVEL)
RTAssertMsg2Weak("rtTimerNtOmniSlaveCallback: Irql=%d expected >=%d\n", KeGetCurrentIrql(), DISPATCH_LEVEL);
int iCpuSelf = RTMpCpuIdToSetIndex(RTMpCpuId());
if (pSubTimer - &pTimer->aSubTimers[0] != iCpuSelf)
RTAssertMsg2Weak("rtTimerNtOmniSlaveCallback: iCpuSelf=%d pSubTimer=%p / %d\n", iCpuSelf, pSubTimer, pSubTimer - &pTimer->aSubTimers[0]);
#endif
/*
* Check that we haven't been suspended before doing the callout.
*/
if ( !ASMAtomicUoReadBool(&pTimer->fSuspended)
&& pTimer->u32Magic == RTTIMER_MAGIC)
{
ASMAtomicWriteHandle(&pSubTimer->hActiveThread, RTThreadNativeSelf());
if (!pTimer->u64NanoInterval)
if (ASMAtomicDecS32(&pTimer->cOmniSuspendCountDown) <= 0)
ASMAtomicWriteBool(&pTimer->fSuspended, true);
pTimer->pfnTimer(pTimer, pTimer->pvUser, ++pSubTimer->iTick);
ASMAtomicWriteHandle(&pSubTimer->hActiveThread, NIL_RTNATIVETHREAD);
}
NOREF(pDpc); NOREF(SystemArgument1); NOREF(SystemArgument2);
}
/**
* Releases a VBoxFUSE node reference and unlocks it.
*
* @returns true if deleted, false if not.
* @param pNode The node.
*/
static bool vboxfuseNodeReleaseAndUnlock(PVBOXFUSENODE pNode)
{
if (ASMAtomicDecS32(&pNode->cRefs) == 0)
return vboxfuseNodeDestroy(pNode, true /* fLocked */);
vboxfuseNodeUnlock(pNode);
return false;
}
RTDECL(int) RTFileAioReqCancel(RTFILEAIOREQ hReq)
{
PRTFILEAIOREQINTERNAL pReqInt = hReq;
RTFILEAIOREQ_VALID_RETURN(pReqInt);
RTFILEAIOREQ_STATE_RETURN_RC(pReqInt, SUBMITTED, VERR_FILE_AIO_NOT_SUBMITTED);
LNXKAIOIOEVENT AioEvent;
int rc = rtFileAsyncIoLinuxCancel(pReqInt->AioContext, &pReqInt->AioCB, &AioEvent);
if (RT_SUCCESS(rc))
{
/*
* Decrement request count because the request will never arrive at the
* completion port.
*/
AssertMsg(VALID_PTR(pReqInt->pCtxInt),
("Invalid state. Request was canceled but wasn't submitted\n"));
ASMAtomicDecS32(&pReqInt->pCtxInt->cRequests);
pReqInt->Rc = VERR_FILE_AIO_CANCELED;
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
return VINF_SUCCESS;
}
if (rc == VERR_TRY_AGAIN)
return VERR_FILE_AIO_IN_PROGRESS;
return rc;
}
/**
* Undoing rtstrFormatTypeReadLock.
*/
DECLINLINE(void) rtstrFormatTypeReadUnlock(void)
{
#if defined(RTSTRFORMATTYPE_WITH_LOCKING)
Assert(g_i32Spinlock > 0);
ASMAtomicDecS32(&g_i32Spinlock);
#endif
}
/**
* @copydoc RAWPCIFACTORY::pfnRelease
*/
static DECLCALLBACK(void) vboxPciFactoryRelease(PRAWPCIFACTORY pFactory)
{
PVBOXRAWPCIGLOBALS pGlobals = (PVBOXRAWPCIGLOBALS)((uint8_t *)pFactory - RT_OFFSETOF(VBOXRAWPCIGLOBALS, RawPciFactory));
int32_t cRefs = ASMAtomicDecS32(&pGlobals->cFactoryRefs);
Assert(cRefs >= 0); NOREF(cRefs);
LogFlow(("vboxPciFactoryRelease: cRefs=%d (new)\n", cRefs));
}
/**
* @copydoc INTNETTRUNKFACTORY::pfnRelease
*/
static DECLCALLBACK(void) vboxNetAdpFactoryRelease(PINTNETTRUNKFACTORY pIfFactory)
{
PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
int32_t cRefs = ASMAtomicDecS32(&pGlobals->cFactoryRefs);
Assert(cRefs >= 0); NOREF(cRefs);
LogFlow(("vboxNetAdpFactoryRelease: cRefs=%d (new)\n", cRefs));
}
RTDECL(int) RTCritSectLeave(PRTCRITSECT pCritSect)
{
/*
* Assert sanity and check for NOP.
*/
Assert(pCritSect);
Assert(pCritSect->u32Magic == RTCRITSECT_MAGIC);
if (pCritSect->fFlags & RTCRITSECT_FLAGS_NOP)
return VINF_SUCCESS;
/*
* Assert ownership and so on.
*/
Assert(pCritSect->cNestings > 0);
Assert(pCritSect->cLockers >= 0);
Assert(pCritSect->NativeThreadOwner == RTThreadNativeSelf());
#ifdef RTCRITSECT_STRICT
int rc9 = RTLockValidatorRecExclReleaseOwner(pCritSect->pValidatorRec, pCritSect->cNestings == 1);
if (RT_FAILURE(rc9))
return rc9;
#endif
/*
* Decrement nestings, if <= 0 when we'll release the critsec.
*/
pCritSect->cNestings--;
if (pCritSect->cNestings > 0)
ASMAtomicDecS32(&pCritSect->cLockers);
else
{
/*
* Set owner to zero.
* Decrement waiters, if >= 0 then we have to wake one of them up.
*/
ASMAtomicWriteHandle(&pCritSect->NativeThreadOwner, NIL_RTNATIVETHREAD);
if (ASMAtomicDecS32(&pCritSect->cLockers) >= 0)
{
int rc = RTSemEventSignal(pCritSect->EventSem);
AssertReleaseMsg(RT_SUCCESS(rc), ("RTSemEventSignal -> %Rrc\n", rc));
}
}
return VINF_SUCCESS;
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
struct RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
#ifdef RTSEMMUTEX_STRICT
int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, pThis->cNestings == 1);
if (RT_FAILURE(rc9))
return rc9;
#endif
/*
* Check if nested.
*/
pthread_t Self = pthread_self();
if (RT_UNLIKELY( pThis->Owner != Self
|| pThis->cNestings == 0))
{
AssertMsgFailed(("Not owner of mutex %p!! Self=%08x Owner=%08x cNestings=%d\n",
pThis, Self, pThis->Owner, pThis->cNestings));
return VERR_NOT_OWNER;
}
/*
* If nested we'll just pop a nesting.
*/
if (pThis->cNestings > 1)
{
ASMAtomicDecU32(&pThis->cNestings);
return VINF_SUCCESS;
}
/*
* Clear the state. (cNestings == 1)
*/
pThis->Owner = (pthread_t)~0;
ASMAtomicWriteU32(&pThis->cNestings, 0);
/*
* Release the mutex.
*/
int32_t iNew = ASMAtomicDecS32(&pThis->iState);
if (RT_UNLIKELY(iNew != 0))
{
/* somebody is waiting, try wake up one of them. */
ASMAtomicXchgS32(&pThis->iState, 0);
(void)sys_futex(&pThis->iState, FUTEX_WAKE, 1, NULL, NULL, 0);
}
return VINF_SUCCESS;
}
/**
* Initializes the ring-0 driver runtime library.
*
* @returns iprt status code.
* @param fReserved Flags reserved for the future.
*/
RTR0DECL(int) RTR0Init(unsigned fReserved)
{
int rc;
uint32_t cNewUsers;
Assert(fReserved == 0);
#ifndef RT_OS_SOLARIS /* On Solaris our thread preemption information is only obtained in rtR0InitNative().*/
RT_ASSERT_PREEMPTIBLE();
#endif
/*
* The first user initializes it.
* We rely on the module loader to ensure that there are no
* initialization races should two modules share the IPRT.
*/
cNewUsers = ASMAtomicIncS32(&g_crtR0Users);
if (cNewUsers != 1)
{
if (cNewUsers > 1)
return VINF_SUCCESS;
ASMAtomicDecS32(&g_crtR0Users);
return VERR_INTERNAL_ERROR_3;
}
rc = rtR0InitNative();
if (RT_SUCCESS(rc))
{
#ifdef RTR0MEM_WITH_EF_APIS
rtR0MemEfInit();
#endif
rc = rtThreadInit();
if (RT_SUCCESS(rc))
{
#ifndef IN_GUEST /* play safe for now */
rc = rtR0MpNotificationInit();
if (RT_SUCCESS(rc))
{
rc = rtR0PowerNotificationInit();
if (RT_SUCCESS(rc))
return rc;
rtR0MpNotificationTerm();
}
#else
if (RT_SUCCESS(rc))
return rc;
#endif
rtThreadTerm();
}
#ifdef RTR0MEM_WITH_EF_APIS
rtR0MemEfTerm();
#endif
rtR0TermNative();
}
return rc;
}
/**
* Terminates the ring-0 driver runtime library.
*/
RTR0DECL(void) RTR0Term(void)
{
int32_t cNewUsers;
RT_ASSERT_PREEMPTIBLE();
cNewUsers = ASMAtomicDecS32(&g_crtR0Users);
Assert(cNewUsers >= 0);
if (cNewUsers == 0)
rtR0Term();
else if (cNewUsers < 0)
ASMAtomicIncS32(&g_crtR0Users);
}
/**
* Wrapper between the native nt per-cpu callbacks and PFNRTWORKER
*
* @param Dpc DPC object
* @param DeferredContext Context argument specified by KeInitializeDpc
* @param SystemArgument1 Argument specified by KeInsertQueueDpc
* @param SystemArgument2 Argument specified by KeInsertQueueDpc
*/
static VOID __stdcall rtmpNtDPCWrapper(IN PKDPC Dpc, IN PVOID DeferredContext, IN PVOID SystemArgument1, IN PVOID SystemArgument2)
{
PRTMPARGS pArgs = (PRTMPARGS)DeferredContext;
ASMAtomicIncU32(&pArgs->cHits);
pArgs->pfnWorker(KeGetCurrentProcessorNumber(), pArgs->pvUser1, pArgs->pvUser2);
/* Dereference the argument structure. */
int32_t cRefs = ASMAtomicDecS32(&pArgs->cRefs);
Assert(cRefs >= 0);
if (cRefs == 0)
ExFreePool(pArgs);
}
HRESULT ListenerRecord::dequeue(IEvent **aEvent,
LONG aTimeout,
AutoLockBase &aAlock)
{
if (mActive)
return VBOX_E_INVALID_OBJECT_STATE;
// retain listener record
RecordHolder<ListenerRecord> holder(this);
::RTCritSectEnter(&mcsQLock);
mLastRead = RTTimeMilliTS();
/*
* If waiting both desired and necessary, then try grab the event
* semaphore and mark it busy. If it's NIL we've been shut down already.
*/
if (aTimeout != 0 && mQueue.empty())
{
RTSEMEVENT hEvt = mQEvent;
if (hEvt != NIL_RTSEMEVENT)
{
ASMAtomicIncS32(&mQEventBusyCnt);
::RTCritSectLeave(&mcsQLock);
// release lock while waiting, listener will not go away due to above holder
aAlock.release();
::RTSemEventWait(hEvt, aTimeout);
ASMAtomicDecS32(&mQEventBusyCnt);
// reacquire lock
aAlock.acquire();
::RTCritSectEnter(&mcsQLock);
}
}
if (mQueue.empty())
*aEvent = NULL;
else
{
mQueue.front().queryInterfaceTo(aEvent);
mQueue.pop_front();
}
::RTCritSectLeave(&mcsQLock);
return S_OK;
}
/**
* Internal initialization worker.
*
* @returns IPRT status code.
* @param fFlags Flags, see RTR3INIT_XXX.
* @param cArgs Pointer to the argument count.
* @param ppapszArgs Pointer to the argument vector pointer. NULL
* allowed if @a cArgs is 0.
* @param pszProgramPath The program path. Pass NULL if we're to figure it
* out ourselves.
*/
static int rtR3Init(uint32_t fFlags, int cArgs, char ***papszArgs, const char *pszProgramPath)
{
/* no entry log flow, because prefixes and thread may freak out. */
Assert(!(fFlags & ~(RTR3INIT_FLAGS_DLL | RTR3INIT_FLAGS_SUPLIB)));
Assert(!(fFlags & RTR3INIT_FLAGS_DLL) || cArgs == 0);
/*
* Do reference counting, only initialize the first time around.
*
* We are ASSUMING that nobody will be able to race RTR3Init* calls when the
* first one, the real init, is running (second assertion).
*/
int32_t cUsers = ASMAtomicIncS32(&g_cUsers);
if (cUsers != 1)
{
AssertMsg(cUsers > 1, ("%d\n", cUsers));
Assert(!g_fInitializing);
#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
if (fFlags & RTR3INIT_FLAGS_SUPLIB)
SUPR3Init(NULL);
#endif
if (!pszProgramPath)
return VINF_SUCCESS;
int rc = rtR3InitProgramPath(pszProgramPath);
if (RT_SUCCESS(rc))
rc = rtR3InitArgv(fFlags, cArgs, papszArgs);
return rc;
}
ASMAtomicWriteBool(&g_fInitializing, true);
/*
* Do the initialization.
*/
int rc = rtR3InitBody(fFlags, cArgs, papszArgs, pszProgramPath);
if (RT_FAILURE(rc))
{
/* failure */
ASMAtomicWriteBool(&g_fInitializing, false);
ASMAtomicDecS32(&g_cUsers);
return rc;
}
/* success */
LogFlow(("rtR3Init: returns VINF_SUCCESS\n"));
ASMAtomicWriteBool(&g_fInitializing, false);
return VINF_SUCCESS;
}
HRESULT ListenerRecord::enqueue(IEvent *aEvent)
{
AssertMsg(!mActive, ("must be passive\n"));
// put an event the queue
::RTCritSectEnter(&mcsQLock);
// If there was no events reading from the listener for the long time,
// and events keep coming, or queue is oversized we shall unregister this listener.
uint64_t sinceRead = RTTimeMilliTS() - mLastRead;
size_t queueSize = mQueue.size();
if (queueSize > 1000 || (queueSize > 500 && sinceRead > 60 * 1000))
{
::RTCritSectLeave(&mcsQLock);
return E_ABORT;
}
RTSEMEVENT hEvt = mQEvent;
if (queueSize != 0 && mQueue.back() == aEvent)
/* if same event is being pushed multiple times - it's reusable event and
we don't really need multiple instances of it in the queue */
hEvt = NIL_RTSEMEVENT;
else if (hEvt != NIL_RTSEMEVENT) /* don't bother queuing after shutdown */
{
mQueue.push_back(aEvent);
ASMAtomicIncS32(&mQEventBusyCnt);
}
::RTCritSectLeave(&mcsQLock);
// notify waiters unless we've been shut down.
if (hEvt != NIL_RTSEMEVENT)
{
::RTSemEventSignal(hEvt);
ASMAtomicDecS32(&mQEventBusyCnt);
}
return S_OK;
}
/**
* Common worker for clientClose and VBoxDrvDarwinClose.
*/
/* static */ void org_virtualbox_SupDrvClient::sessionClose(RTPROCESS Process)
{
/*
* Find the session and remove it from the hash table.
*
* Note! Only one session per process. (Both start() and
* VBoxDrvDarwinOpen makes sure this is so.)
*/
const unsigned iHash = SESSION_HASH(Process);
RTSpinlockAcquire(g_Spinlock);
PSUPDRVSESSION pSession = g_apSessionHashTab[iHash];
if (pSession)
{
if (pSession->Process == Process)
{
g_apSessionHashTab[iHash] = pSession->pNextHash;
pSession->pNextHash = NULL;
ASMAtomicDecS32(&g_cSessions);
}
else
{
PSUPDRVSESSION pPrev = pSession;
pSession = pSession->pNextHash;
while (pSession)
{
if (pSession->Process == Process)
{
pPrev->pNextHash = pSession->pNextHash;
pSession->pNextHash = NULL;
ASMAtomicDecS32(&g_cSessions);
break;
}
/* next */
pPrev = pSession;
pSession = pSession->pNextHash;
}
}
}
RTSpinlockReleaseNoInts(g_Spinlock);
if (!pSession)
{
Log(("SupDrvClient::sessionClose: pSession == NULL, pid=%d; freed already?\n", (int)Process));
return;
}
/*
* Remove it from the client object.
*/
org_virtualbox_SupDrvClient *pThis = (org_virtualbox_SupDrvClient *)pSession->pvSupDrvClient;
pSession->pvSupDrvClient = NULL;
if (pThis)
{
Assert(pThis->m_pSession == pSession);
pThis->m_pSession = NULL;
}
/*
* Close the session.
*/
supdrvCloseSession(&g_DevExt, pSession);
}
/**
* Leaves a critical section entered with PDMCritSectEnter().
*
* @param pCritSect The PDM critical section to leave.
*/
VMMDECL(void) PDMCritSectLeave(PPDMCRITSECT pCritSect)
{
AssertMsg(pCritSect->s.Core.u32Magic == RTCRITSECT_MAGIC, ("%p %RX32\n", pCritSect, pCritSect->s.Core.u32Magic));
Assert(pCritSect->s.Core.u32Magic == RTCRITSECT_MAGIC);
/* Check for NOP sections before asserting ownership. */
if (pCritSect->s.Core.fFlags & RTCRITSECT_FLAGS_NOP)
return;
/*
* Always check that the caller is the owner (screw performance).
*/
RTNATIVETHREAD const hNativeSelf = pdmCritSectGetNativeSelf(pCritSect);
AssertReleaseMsgReturnVoid(pCritSect->s.Core.NativeThreadOwner == hNativeSelf,
("%p %s: %p != %p; cLockers=%d cNestings=%d\n", pCritSect, R3STRING(pCritSect->s.pszName),
pCritSect->s.Core.NativeThreadOwner, hNativeSelf,
pCritSect->s.Core.cLockers, pCritSect->s.Core.cNestings));
Assert(pCritSect->s.Core.cNestings >= 1);
/*
* Nested leave.
*/
if (pCritSect->s.Core.cNestings > 1)
{
ASMAtomicDecS32(&pCritSect->s.Core.cNestings);
Assert(pCritSect->s.Core.cNestings >= 1);
ASMAtomicDecS32(&pCritSect->s.Core.cLockers);
Assert(pCritSect->s.Core.cLockers >= 0);
return;
}
#ifdef IN_RING0
# if 0 /** @todo Make SUPSemEventSignal interrupt safe (handle table++) and enable this for: defined(RT_OS_LINUX) || defined(RT_OS_OS2) */
if (1) /* SUPSemEventSignal is safe */
# else
if (ASMIntAreEnabled())
# endif
#endif
#if defined(IN_RING3) || defined(IN_RING0)
{
/*
* Leave for real.
*/
/* update members. */
# ifdef IN_RING3
RTSEMEVENT hEventToSignal = pCritSect->s.EventToSignal;
pCritSect->s.EventToSignal = NIL_RTSEMEVENT;
# if defined(PDMCRITSECT_STRICT)
if (pCritSect->s.Core.pValidatorRec->hThread != NIL_RTTHREAD)
RTLockValidatorRecExclReleaseOwnerUnchecked(pCritSect->s.Core.pValidatorRec);
# endif
Assert(!pCritSect->s.Core.pValidatorRec || pCritSect->s.Core.pValidatorRec->hThread == NIL_RTTHREAD);
# endif
ASMAtomicAndU32(&pCritSect->s.Core.fFlags, ~PDMCRITSECT_FLAGS_PENDING_UNLOCK);
ASMAtomicWriteHandle(&pCritSect->s.Core.NativeThreadOwner, NIL_RTNATIVETHREAD);
ASMAtomicDecS32(&pCritSect->s.Core.cNestings);
Assert(pCritSect->s.Core.cNestings == 0);
/* stop and decrement lockers. */
STAM_PROFILE_ADV_STOP(&pCritSect->s.StatLocked, l);
ASMCompilerBarrier();
if (ASMAtomicDecS32(&pCritSect->s.Core.cLockers) >= 0)
{
/* Someone is waiting, wake up one of them. */
SUPSEMEVENT hEvent = (SUPSEMEVENT)pCritSect->s.Core.EventSem;
PSUPDRVSESSION pSession = pCritSect->s.CTX_SUFF(pVM)->pSession;
int rc = SUPSemEventSignal(pSession, hEvent);
AssertRC(rc);
}
# ifdef IN_RING3
/* Signal exit event. */
if (hEventToSignal != NIL_RTSEMEVENT)
{
LogBird(("Signalling %#x\n", hEventToSignal));
int rc = RTSemEventSignal(hEventToSignal);
AssertRC(rc);
}
# endif
# if defined(DEBUG_bird) && defined(IN_RING0)
VMMTrashVolatileXMMRegs();
# endif
}
#endif /* IN_RING3 || IN_RING0 */
#ifdef IN_RING0
else
#endif
#if defined(IN_RING0) || defined(IN_RC)
{
/*
* Try leave it.
*/
if (pCritSect->s.Core.cLockers == 0)
{
ASMAtomicWriteS32(&pCritSect->s.Core.cNestings, 0);
RTNATIVETHREAD hNativeThread = pCritSect->s.Core.NativeThreadOwner;
ASMAtomicAndU32(&pCritSect->s.Core.fFlags, ~PDMCRITSECT_FLAGS_PENDING_UNLOCK);
STAM_PROFILE_ADV_STOP(&pCritSect->s.StatLocked, l);
ASMAtomicWriteHandle(&pCritSect->s.Core.NativeThreadOwner, NIL_RTNATIVETHREAD);
if (ASMAtomicCmpXchgS32(&pCritSect->s.Core.cLockers, -1, 0))
return;
/* darn, someone raced in on us. */
ASMAtomicWriteHandle(&pCritSect->s.Core.NativeThreadOwner, hNativeThread);
STAM_PROFILE_ADV_START(&pCritSect->s.StatLocked, l);
Assert(pCritSect->s.Core.cNestings == 0);
ASMAtomicWriteS32(&pCritSect->s.Core.cNestings, 1);
}
ASMAtomicOrU32(&pCritSect->s.Core.fFlags, PDMCRITSECT_FLAGS_PENDING_UNLOCK);
/*
* Queue the request.
*/
PVM pVM = pCritSect->s.CTX_SUFF(pVM); AssertPtr(pVM);
PVMCPU pVCpu = VMMGetCpu(pVM); AssertPtr(pVCpu);
uint32_t i = pVCpu->pdm.s.cQueuedCritSectLeaves++;
LogFlow(("PDMCritSectLeave: [%d]=%p => R3\n", i, pCritSect));
AssertFatal(i < RT_ELEMENTS(pVCpu->pdm.s.apQueuedCritSectsLeaves));
pVCpu->pdm.s.apQueuedCritSectsLeaves[i] = MMHyperCCToR3(pVM, pCritSect);
VMCPU_FF_SET(pVCpu, VMCPU_FF_PDM_CRITSECT);
VMCPU_FF_SET(pVCpu, VMCPU_FF_TO_R3);
STAM_REL_COUNTER_INC(&pVM->pdm.s.StatQueuedCritSectLeaves);
STAM_REL_COUNTER_INC(&pCritSect->s.StatContentionRZUnlock);
}
#endif /* IN_RING0 || IN_RC */
}
static int rtSemEventWait(RTSEMEVENT hEventSem, RTMSINTERVAL cMillies, bool fAutoResume)
{
PCRTLOCKVALSRCPOS pSrcPos = NULL;
/*
* Validate input.
*/
struct RTSEMEVENTINTERNAL *pThis = hEventSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->iMagic == RTSEMEVENT_MAGIC, VERR_INVALID_HANDLE);
/*
* Quickly check whether it's signaled.
*/
/** @todo this isn't fair if someone is already waiting on it. They should
* have the first go at it!
* (ASMAtomicReadS32(&pThis->cWaiters) == 0 || !cMillies) && ... */
if (ASMAtomicCmpXchgU32(&pThis->fSignalled, 0, 1))
return VINF_SUCCESS;
/*
* Convert the timeout value.
*/
struct timespec ts;
struct timespec *pTimeout = NULL;
uint64_t u64End = 0; /* shut up gcc */
if (cMillies != RT_INDEFINITE_WAIT)
{
if (!cMillies)
return VERR_TIMEOUT;
ts.tv_sec = cMillies / 1000;
ts.tv_nsec = (cMillies % 1000) * UINT32_C(1000000);
u64End = RTTimeSystemNanoTS() + cMillies * UINT64_C(1000000);
pTimeout = &ts;
}
ASMAtomicIncS32(&pThis->cWaiters);
/*
* The wait loop.
*/
#ifdef RTSEMEVENT_STRICT
RTTHREAD hThreadSelf = !(pThis->fFlags & RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)
? RTThreadSelfAutoAdopt()
: RTThreadSelf();
#else
RTTHREAD hThreadSelf = RTThreadSelf();
#endif
int rc = VINF_SUCCESS;
for (;;)
{
#ifdef RTSEMEVENT_STRICT
if (pThis->fEverHadSignallers)
{
rc = RTLockValidatorRecSharedCheckBlocking(&pThis->Signallers, hThreadSelf, pSrcPos, false,
cMillies, RTTHREADSTATE_EVENT, true);
if (RT_FAILURE(rc))
break;
}
#endif
RTThreadBlocking(hThreadSelf, RTTHREADSTATE_EVENT, true);
long lrc = sys_futex(&pThis->fSignalled, FUTEX_WAIT, 0, pTimeout, NULL, 0);
RTThreadUnblocked(hThreadSelf, RTTHREADSTATE_EVENT);
if (RT_UNLIKELY(pThis->iMagic != RTSEMEVENT_MAGIC))
{
rc = VERR_SEM_DESTROYED;
break;
}
if (RT_LIKELY(lrc == 0 || lrc == -EWOULDBLOCK))
{
/* successful wakeup or fSignalled > 0 in the meantime */
if (ASMAtomicCmpXchgU32(&pThis->fSignalled, 0, 1))
break;
}
else if (lrc == -ETIMEDOUT)
{
rc = VERR_TIMEOUT;
break;
}
else if (lrc == -EINTR)
{
if (!fAutoResume)
{
rc = VERR_INTERRUPTED;
break;
}
}
else
{
/* this shouldn't happen! */
AssertMsgFailed(("rc=%ld errno=%d\n", lrc, errno));
rc = RTErrConvertFromErrno(lrc);
break;
}
/* adjust the relative timeout */
if (pTimeout)
{
int64_t i64Diff = u64End - RTTimeSystemNanoTS();
if (i64Diff < 1000)
{
rc = VERR_TIMEOUT;
break;
}
ts.tv_sec = (uint64_t)i64Diff / UINT32_C(1000000000);
ts.tv_nsec = (uint64_t)i64Diff % UINT32_C(1000000000);
}
}
ASMAtomicDecS32(&pThis->cWaiters);
return rc;
}
void BusAssignmentManager::Release()
{
if (ASMAtomicDecS32(&pState->cRefCnt) == 0)
delete this;
}
/**
* Notify the XPCOM thread that we consumed an XPCOM event.
*/
void consumedXPCOMUserEvent(void)
{
ASMAtomicDecS32(&g_s32XPCOMEventsPending);
}
void release()
{
if (ASMAtomicDecS32(&mRefCnt) <= 0) delete this;
}
DECL_FORCE_INLINE(int) rtCritSectEnter(PRTCRITSECT pCritSect, PCRTLOCKVALSRCPOS pSrcPos)
{
AssertPtr(pCritSect);
AssertReturn(pCritSect->u32Magic == RTCRITSECT_MAGIC, VERR_SEM_DESTROYED);
/*
* Return straight away if NOP.
*/
if (pCritSect->fFlags & RTCRITSECT_FLAGS_NOP)
return VINF_SUCCESS;
/*
* How is calling and is the order right?
*/
RTNATIVETHREAD NativeThreadSelf = RTThreadNativeSelf();
#ifdef RTCRITSECT_STRICT
RTTHREAD hThreadSelf = pCritSect->pValidatorRec
? RTThreadSelfAutoAdopt()
: RTThreadSelf();
int rc9;
if (pCritSect->pValidatorRec) /* (bootstap) */
{
rc9 = RTLockValidatorRecExclCheckOrder(pCritSect->pValidatorRec, hThreadSelf, pSrcPos, RT_INDEFINITE_WAIT);
if (RT_FAILURE(rc9))
return rc9;
}
#endif
/*
* Increment the waiter counter.
* This becomes 0 when the section is free.
*/
if (ASMAtomicIncS32(&pCritSect->cLockers) > 0)
{
/*
* Nested?
*/
if (pCritSect->NativeThreadOwner == NativeThreadSelf)
{
if (!(pCritSect->fFlags & RTCRITSECT_FLAGS_NO_NESTING))
{
#ifdef RTCRITSECT_STRICT
rc9 = RTLockValidatorRecExclRecursion(pCritSect->pValidatorRec, pSrcPos);
if (RT_FAILURE(rc9))
{
ASMAtomicDecS32(&pCritSect->cLockers);
return rc9;
}
#endif
pCritSect->cNestings++;
return VINF_SUCCESS;
}
AssertBreakpoint(); /* don't do normal assertion here, the logger uses this code too. */
ASMAtomicDecS32(&pCritSect->cLockers);
return VERR_SEM_NESTED;
}
/*
* Wait for the current owner to release it.
*/
#ifndef RTCRITSECT_STRICT
RTTHREAD hThreadSelf = RTThreadSelf();
#endif
for (;;)
{
#ifdef RTCRITSECT_STRICT
rc9 = RTLockValidatorRecExclCheckBlocking(pCritSect->pValidatorRec, hThreadSelf, pSrcPos,
!(pCritSect->fFlags & RTCRITSECT_FLAGS_NO_NESTING),
RT_INDEFINITE_WAIT, RTTHREADSTATE_CRITSECT, false);
if (RT_FAILURE(rc9))
{
ASMAtomicDecS32(&pCritSect->cLockers);
return rc9;
}
#else
RTThreadBlocking(hThreadSelf, RTTHREADSTATE_CRITSECT, false);
#endif
int rc = RTSemEventWait(pCritSect->EventSem, RT_INDEFINITE_WAIT);
RTThreadUnblocked(hThreadSelf, RTTHREADSTATE_CRITSECT);
if (pCritSect->u32Magic != RTCRITSECT_MAGIC)
return VERR_SEM_DESTROYED;
if (rc == VINF_SUCCESS)
break;
AssertMsg(rc == VERR_TIMEOUT || rc == VERR_INTERRUPTED, ("rc=%Rrc\n", rc));
}
AssertMsg(pCritSect->NativeThreadOwner == NIL_RTNATIVETHREAD, ("pCritSect->NativeThreadOwner=%p\n", pCritSect->NativeThreadOwner));
}
/*
* First time
*/
pCritSect->cNestings = 1;
ASMAtomicWriteHandle(&pCritSect->NativeThreadOwner, NativeThreadSelf);
#ifdef RTCRITSECT_STRICT
RTLockValidatorRecExclSetOwner(pCritSect->pValidatorRec, hThreadSelf, pSrcPos, true);
#endif
return VINF_SUCCESS;
}
/**
* Releases a handle reference.
* @param pHandle The handle to release.
*/
DECLINLINE(void) MsiHackHandleRelease(PMSIHACKHANDLE pHandle)
{
if (ASMAtomicDecS32(&pHandle->cRefs) != 0)
return;
MsiHackHandleDestroy(pHandle);
}
/**
* The timer callback for an omni-timer.
*
* This is responsible for queueing the DPCs for the other CPUs and
* perform the callback on the CPU on which it is called.
*
* @param pDpc The DPC object.
* @param pvUser Pointer to the sub-timer.
* @param SystemArgument1 Some system stuff.
* @param SystemArgument2 Some system stuff.
*/
static void _stdcall rtTimerNtOmniMasterCallback(IN PKDPC pDpc, IN PVOID pvUser, IN PVOID SystemArgument1, IN PVOID SystemArgument2)
{
PRTTIMERNTSUBTIMER pSubTimer = (PRTTIMERNTSUBTIMER)pvUser;
PRTTIMER pTimer = pSubTimer->pParent;
int iCpuSelf = RTMpCpuIdToSetIndex(RTMpCpuId());
AssertPtr(pTimer);
#ifdef RT_STRICT
if (KeGetCurrentIrql() < DISPATCH_LEVEL)
RTAssertMsg2Weak("rtTimerNtOmniMasterCallback: Irql=%d expected >=%d\n", KeGetCurrentIrql(), DISPATCH_LEVEL);
if (pSubTimer - &pTimer->aSubTimers[0] != iCpuSelf)
RTAssertMsg2Weak("rtTimerNtOmniMasterCallback: iCpuSelf=%d pSubTimer=%p / %d\n", iCpuSelf, pSubTimer, pSubTimer - &pTimer->aSubTimers[0]);
#endif
/*
* Check that we haven't been suspended before scheduling the other DPCs
* and doing the callout.
*/
if ( !ASMAtomicUoReadBool(&pTimer->fSuspended)
&& pTimer->u32Magic == RTTIMER_MAGIC)
{
RTCPUSET OnlineSet;
RTMpGetOnlineSet(&OnlineSet);
ASMAtomicWriteHandle(&pSubTimer->hActiveThread, RTThreadNativeSelf());
if (pTimer->u64NanoInterval)
{
/*
* Recurring timer.
*/
for (int iCpu = 0; iCpu < RTCPUSET_MAX_CPUS; iCpu++)
if ( RTCpuSetIsMemberByIndex(&OnlineSet, iCpu)
&& iCpuSelf != iCpu)
KeInsertQueueDpc(&pTimer->aSubTimers[iCpu].NtDpc, 0, 0);
uint64_t iTick = ++pSubTimer->iTick;
rtTimerNtRearmInternval(pTimer, iTick, &pTimer->aSubTimers[RTMpCpuIdToSetIndex(pTimer->idCpu)].NtDpc);
pTimer->pfnTimer(pTimer, pTimer->pvUser, iTick);
}
else
{
/*
* Single shot timers gets complicated wrt to fSuspended maintance.
*/
uint32_t cCpus = 0;
for (int iCpu = 0; iCpu < RTCPUSET_MAX_CPUS; iCpu++)
if (RTCpuSetIsMemberByIndex(&OnlineSet, iCpu))
cCpus++;
ASMAtomicAddS32(&pTimer->cOmniSuspendCountDown, cCpus);
for (int iCpu = 0; iCpu < RTCPUSET_MAX_CPUS; iCpu++)
if ( RTCpuSetIsMemberByIndex(&OnlineSet, iCpu)
&& iCpuSelf != iCpu)
if (!KeInsertQueueDpc(&pTimer->aSubTimers[iCpu].NtDpc, 0, 0))
ASMAtomicDecS32(&pTimer->cOmniSuspendCountDown); /* already queued and counted. */
if (ASMAtomicDecS32(&pTimer->cOmniSuspendCountDown) <= 0)
ASMAtomicWriteBool(&pTimer->fSuspended, true);
pTimer->pfnTimer(pTimer, pTimer->pvUser, ++pSubTimer->iTick);
}
ASMAtomicWriteHandle(&pSubTimer->hActiveThread, NIL_RTNATIVETHREAD);
}
NOREF(pDpc); NOREF(SystemArgument1); NOREF(SystemArgument2);
}
/**
* Internal worker for the RTMpOn* APIs.
*
* @returns IPRT status code.
* @param pfnWorker The callback.
* @param pvUser1 User argument 1.
* @param pvUser2 User argument 2.
* @param enmCpuid What to do / is idCpu valid.
* @param idCpu Used if enmCpuid is RT_NT_CPUID_SPECIFIC or
* RT_NT_CPUID_PAIR, otherwise ignored.
* @param idCpu2 Used if enmCpuid is RT_NT_CPUID_PAIR, otherwise ignored.
* @param pcHits Where to return the number of this. Optional.
*/
static int rtMpCallUsingDpcs(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2,
RT_NT_CPUID enmCpuid, RTCPUID idCpu, RTCPUID idCpu2, uint32_t *pcHits)
{
PRTMPARGS pArgs;
KDPC *paExecCpuDpcs;
#if 0
/* KeFlushQueuedDpcs must be run at IRQL PASSIVE_LEVEL according to MSDN, but the
* driver verifier doesn't complain...
*/
AssertMsg(KeGetCurrentIrql() == PASSIVE_LEVEL, ("%d != %d (PASSIVE_LEVEL)\n", KeGetCurrentIrql(), PASSIVE_LEVEL));
#endif
#ifdef IPRT_TARGET_NT4
KAFFINITY Mask;
/* g_pfnrtNt* are not present on NT anyway. */
return VERR_NOT_SUPPORTED;
#else
KAFFINITY Mask = KeQueryActiveProcessors();
#endif
/* KeFlushQueuedDpcs is not present in Windows 2000; import it dynamically so we can just fail this call. */
if (!g_pfnrtNtKeFlushQueuedDpcs)
return VERR_NOT_SUPPORTED;
pArgs = (PRTMPARGS)ExAllocatePoolWithTag(NonPagedPool, MAXIMUM_PROCESSORS*sizeof(KDPC) + sizeof(RTMPARGS), (ULONG)'RTMp');
if (!pArgs)
return VERR_NO_MEMORY;
pArgs->pfnWorker = pfnWorker;
pArgs->pvUser1 = pvUser1;
pArgs->pvUser2 = pvUser2;
pArgs->idCpu = NIL_RTCPUID;
pArgs->idCpu2 = NIL_RTCPUID;
pArgs->cHits = 0;
pArgs->cRefs = 1;
paExecCpuDpcs = (KDPC *)(pArgs + 1);
if (enmCpuid == RT_NT_CPUID_SPECIFIC)
{
KeInitializeDpc(&paExecCpuDpcs[0], rtmpNtDPCWrapper, pArgs);
KeSetImportanceDpc(&paExecCpuDpcs[0], HighImportance);
KeSetTargetProcessorDpc(&paExecCpuDpcs[0], (int)idCpu);
pArgs->idCpu = idCpu;
}
else if (enmCpuid == RT_NT_CPUID_SPECIFIC)
{
KeInitializeDpc(&paExecCpuDpcs[0], rtmpNtDPCWrapper, pArgs);
KeSetImportanceDpc(&paExecCpuDpcs[0], HighImportance);
KeSetTargetProcessorDpc(&paExecCpuDpcs[0], (int)idCpu);
pArgs->idCpu = idCpu;
KeInitializeDpc(&paExecCpuDpcs[1], rtmpNtDPCWrapper, pArgs);
KeSetImportanceDpc(&paExecCpuDpcs[1], HighImportance);
KeSetTargetProcessorDpc(&paExecCpuDpcs[1], (int)idCpu2);
pArgs->idCpu2 = idCpu2;
}
else
{
for (unsigned i = 0; i < MAXIMUM_PROCESSORS; i++)
{
KeInitializeDpc(&paExecCpuDpcs[i], rtmpNtDPCWrapper, pArgs);
KeSetImportanceDpc(&paExecCpuDpcs[i], HighImportance);
KeSetTargetProcessorDpc(&paExecCpuDpcs[i], i);
}
}
/* Raise the IRQL to DISPATCH_LEVEL so we can't be rescheduled to another cpu.
* KeInsertQueueDpc must also be executed at IRQL >= DISPATCH_LEVEL.
*/
KIRQL oldIrql;
KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);
/*
* We cannot do other than assume a 1:1 relationship between the
* affinity mask and the process despite the warnings in the docs.
* If someone knows a better way to get this done, please let bird know.
*/
ASMCompilerBarrier(); /* paranoia */
if (enmCpuid == RT_NT_CPUID_SPECIFIC)
{
ASMAtomicIncS32(&pArgs->cRefs);
BOOLEAN ret = KeInsertQueueDpc(&paExecCpuDpcs[0], 0, 0);
Assert(ret);
}
else if (enmCpuid == RT_NT_CPUID_PAIR)
{
ASMAtomicIncS32(&pArgs->cRefs);
BOOLEAN ret = KeInsertQueueDpc(&paExecCpuDpcs[0], 0, 0);
Assert(ret);
ASMAtomicIncS32(&pArgs->cRefs);
ret = KeInsertQueueDpc(&paExecCpuDpcs[1], 0, 0);
Assert(ret);
}
else
{
unsigned iSelf = KeGetCurrentProcessorNumber();
for (unsigned i = 0; i < MAXIMUM_PROCESSORS; i++)
{
if ( (i != iSelf)
&& (Mask & RT_BIT_64(i)))
{
ASMAtomicIncS32(&pArgs->cRefs);
BOOLEAN ret = KeInsertQueueDpc(&paExecCpuDpcs[i], 0, 0);
Assert(ret);
}
}
if (enmCpuid != RT_NT_CPUID_OTHERS)
pfnWorker(iSelf, pvUser1, pvUser2);
}
KeLowerIrql(oldIrql);
/* Flush all DPCs and wait for completion. (can take long!) */
/** @todo Consider changing this to an active wait using some atomic inc/dec
* stuff (and check for the current cpu above in the specific case). */
/** @todo Seems KeFlushQueuedDpcs doesn't wait for the DPCs to be completely
* executed. Seen pArgs being freed while some CPU was using it before
* cRefs was added. */
g_pfnrtNtKeFlushQueuedDpcs();
if (pcHits)
*pcHits = pArgs->cHits;
/* Dereference the argument structure. */
int32_t cRefs = ASMAtomicDecS32(&pArgs->cRefs);
Assert(cRefs >= 0);
if (cRefs == 0)
ExFreePool(pArgs);
return VINF_SUCCESS;
}
/**
* Internal worker processing events and inserting new requests into the waiting list.
*/
static int rtFileAioCtxProcessEvents(PRTFILEAIOCTXINTERNAL pCtxInt)
{
int rc = VINF_SUCCESS;
/* Process new requests first. */
bool fWokenUp = ASMAtomicXchgBool(&pCtxInt->fWokenUpInternal, false);
if (fWokenUp)
{
for (unsigned iSlot = 0; iSlot < RT_ELEMENTS(pCtxInt->apReqsNewHead); iSlot++)
{
PRTFILEAIOREQINTERNAL pReqHead = ASMAtomicXchgPtrT(&pCtxInt->apReqsNewHead[iSlot], NULL, PRTFILEAIOREQINTERNAL);
while ( (pCtxInt->iFirstFree < pCtxInt->cReqsWaitMax)
&& pReqHead)
{
RTFIELAIOREQ_ASSERT_STATE(pReqHead, SUBMITTED);
pCtxInt->apReqs[pCtxInt->iFirstFree] = pReqHead;
pReqHead->iWaitingList = pCtxInt->iFirstFree;
pReqHead = pReqHead->pNext;
/* Clear pointer to next and previous element just for safety. */
pCtxInt->apReqs[pCtxInt->iFirstFree]->pNext = NULL;
pCtxInt->apReqs[pCtxInt->iFirstFree]->pPrev = NULL;
pCtxInt->iFirstFree++;
Assert( (pCtxInt->iFirstFree <= pCtxInt->cMaxRequests)
&& (pCtxInt->iFirstFree <= pCtxInt->cReqsWaitMax));
}
/* Append the rest to the wait list. */
if (pReqHead)
{
RTFIELAIOREQ_ASSERT_STATE(pReqHead, SUBMITTED);
if (!pCtxInt->pReqsWaitHead)
{
Assert(!pCtxInt->pReqsWaitTail);
pCtxInt->pReqsWaitHead = pReqHead;
pReqHead->pPrev = NULL;
}
else
{
AssertPtr(pCtxInt->pReqsWaitTail);
pCtxInt->pReqsWaitTail->pNext = pReqHead;
pReqHead->pPrev = pCtxInt->pReqsWaitTail;
}
/* Update tail. */
while (pReqHead->pNext)
{
RTFIELAIOREQ_ASSERT_STATE(pReqHead->pNext, SUBMITTED);
pReqHead = pReqHead->pNext;
}
pCtxInt->pReqsWaitTail = pReqHead;
pCtxInt->pReqsWaitTail->pNext = NULL;
}
}
/* Check if a request needs to be canceled. */
PRTFILEAIOREQINTERNAL pReqToCancel = ASMAtomicReadPtrT(&pCtxInt->pReqToCancel, PRTFILEAIOREQINTERNAL);
if (pReqToCancel)
{
/* The request can be in the array waiting for completion or still in the list because it is full. */
if (pReqToCancel->iWaitingList != RTFILEAIOCTX_WAIT_ENTRY_INVALID)
{
/* Put it out of the waiting list. */
pCtxInt->apReqs[pReqToCancel->iWaitingList] = pCtxInt->apReqs[--pCtxInt->iFirstFree];
pCtxInt->apReqs[pReqToCancel->iWaitingList]->iWaitingList = pReqToCancel->iWaitingList;
}
else
{
/* Unlink from the waiting list. */
PRTFILEAIOREQINTERNAL pPrev = pReqToCancel->pPrev;
PRTFILEAIOREQINTERNAL pNext = pReqToCancel->pNext;
if (pNext)
pNext->pPrev = pPrev;
else
{
/* We canceled the tail. */
pCtxInt->pReqsWaitTail = pPrev;
}
if (pPrev)
pPrev->pNext = pNext;
else
{
/* We canceled the head. */
pCtxInt->pReqsWaitHead = pNext;
}
}
ASMAtomicDecS32(&pCtxInt->cRequests);
AssertMsg(pCtxInt->cRequests >= 0, ("Canceled request not which is not in this context\n"));
RTSemEventSignal(pCtxInt->SemEventCancel);
}
}
else
{
if (ASMAtomicXchgBool(&pCtxInt->fWokenUp, false))
rc = VERR_INTERRUPTED;
}
return rc;
}
