Esempio n. 1
0
RTDECL(int) RTPipeRead(RTPIPE hPipe, void *pvBuf, size_t cbToRead, size_t *pcbRead)
{
    RTPIPEINTERNAL *pThis = hPipe;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTPIPE_MAGIC, VERR_INVALID_HANDLE);
    AssertReturn(pThis->fRead, VERR_ACCESS_DENIED);
    AssertPtr(pcbRead);
    AssertPtr(pvBuf);

    int rc = rtPipeTryNonBlocking(pThis);
    if (RT_SUCCESS(rc))
    {
        ssize_t cbRead = read(pThis->fd, pvBuf, RT_MIN(cbToRead, SSIZE_MAX));
        if (cbRead >= 0)
        {
            if (cbRead || !cbToRead || !rtPipePosixHasHup(pThis))
                *pcbRead = cbRead;
            else
                rc = VERR_BROKEN_PIPE;
        }
        else if (errno == EAGAIN)
        {
            *pcbRead = 0;
            rc = VINF_TRY_AGAIN;
        }
        else
            rc = RTErrConvertFromErrno(errno);

        ASMAtomicDecU32(&pThis->u32State);
    }
    return rc;
}
/**
 *  Uninitializes the instance and sets the ready flag to FALSE.
 *  Called either from FinalRelease() or by the parent when it gets destroyed.
 */
void VirtualBoxClient::uninit()
{
    LogFlowThisFunc(("\n"));

    /* Enclose the state transition Ready->InUninit->NotReady */
    AutoUninitSpan autoUninitSpan(this);
    if (autoUninitSpan.uninitDone())
        return;

    if (mData.m_ThreadWatcher != NIL_RTTHREAD)
    {
        /* Signal the event semaphore and wait for the thread to terminate.
         * if it hangs for some reason exit anyway, this can cause a crash
         * though as the object will no longer be available. */
        RTSemEventSignal(mData.m_SemEvWatcher);
        RTThreadWait(mData.m_ThreadWatcher, 30000, NULL);
        mData.m_ThreadWatcher = NIL_RTTHREAD;
        RTSemEventDestroy(mData.m_SemEvWatcher);
        mData.m_SemEvWatcher = NIL_RTSEMEVENT;
    }

    mData.m_pVirtualBox.setNull();

    ASMAtomicDecU32(&g_cInstances);
}
Esempio n. 3
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int vboxVhwaHlpCheckTerm(PVBOXMP_DEVEXT pDevExt, D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId)
{
    Assert(VidPnSourceId < (D3DDDI_VIDEO_PRESENT_SOURCE_ID)VBoxCommonFromDeviceExt(pDevExt)->cDisplays);
    if (VidPnSourceId >= (D3DDDI_VIDEO_PRESENT_SOURCE_ID)VBoxCommonFromDeviceExt(pDevExt)->cDisplays)
        return VERR_INVALID_PARAMETER;

    PVBOXWDDM_SOURCE pSource = &pDevExt->aSources[VidPnSourceId];

    Assert(!!(pSource->Vhwa.Settings.fFlags & VBOXVHWA_F_ENABLED));

    /** @todo need a better sync */
    uint32_t cNew = ASMAtomicDecU32(&pSource->Vhwa.cOverlaysCreated);
    int rc = VINF_SUCCESS;
    if (!cNew)
    {
        rc = vboxVhwaHlpDestroyPrimary(pDevExt, pSource, VidPnSourceId);
        AssertRC(rc);
    }
    else
    {
        Assert(cNew < UINT32_MAX / 2);
    }

    return rc;
}
RTDECL(int) RTPipeWrite(RTPIPE hPipe, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten)
{
    RTPIPEINTERNAL *pThis = hPipe;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTPIPE_MAGIC, VERR_INVALID_HANDLE);
    AssertReturn(!pThis->fRead, VERR_ACCESS_DENIED);
    AssertPtr(pcbWritten);
    AssertPtr(pvBuf);

    int rc = rtPipeTryNonBlocking(pThis);
    if (RT_SUCCESS(rc))
    {
        if (cbToWrite)
        {
            ssize_t cbWritten = write(pThis->fd, pvBuf, RT_MIN(cbToWrite, SSIZE_MAX));
            if (cbWritten >= 0)
                *pcbWritten = cbWritten;
            else if (errno == EAGAIN)
            {
                *pcbWritten = 0;
                rc = VINF_TRY_AGAIN;
            }
            else
                rc = RTErrConvertFromErrno(errno);
        }
        else
            *pcbWritten = 0;

        ASMAtomicDecU32(&pThis->u32State);
    }
    return rc;
}
Esempio n. 5
0
RTDECL(int)  RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
{
    /*
     * Validate input.
     */
    PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
    if (!pThis)
        return VERR_INVALID_PARAMETER;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
    RT_ASSERT_INTS_ON();

    /*
     * Kill it, wake up all waiting threads and release the reference.
     */
    AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, ~RTSEMMUTEX_MAGIC, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
    lck_spin_lock(pThis->pSpinlock);

    if (pThis->cWaiters > 0)
        thread_wakeup_prim((event_t)pThis, FALSE /* one_thread */, THREAD_RESTART);

    if (ASMAtomicDecU32(&pThis->cRefs) == 0)
        rtSemMutexDarwinFree(pThis);
    else
        lck_spin_unlock(pThis->pSpinlock);

    return VINF_SUCCESS;
}
Esempio n. 6
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/**
 * Releases a reference to a RTMPNTONSPECIFICARGS heap allocation, freeing it
 * when the last reference is released.
 */
DECLINLINE(void) rtMpNtOnSpecificRelease(PRTMPNTONSPECIFICARGS pArgs)
{
    uint32_t cRefs = ASMAtomicDecU32(&pArgs->cRefs);
    AssertMsg(cRefs <= 1, ("cRefs=%#x\n", cRefs));
    if (cRefs == 0)
        ExFreePool(pArgs);
}
/**
 * Release a reference, destroy the thing if necessary.
 *
 * @param   pThis       The semaphore.
 */
DECLINLINE(void) rtR0SemEventMultiHkuRelease(PRTSEMEVENTMULTIINTERNAL pThis)
{
    if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
    {
        Assert(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC);
        RTMemFree(pThis);
    }
}
 uint32_t i_release()
 {
     uint32_t cRefs = ASMAtomicDecU32(&m_cRefs);
     Assert(cRefs < _1K);
     if (cRefs == 0)
         delete this;
     return cRefs;
 }
Esempio n. 9
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void VBoxDispVHWACommandRelease(PVBOXDISPDEV pDev, VBOXVHWACMD* pCmd)
{
    uint32_t cRefs = ASMAtomicDecU32(&pCmd->cRefs);
    Assert(cRefs < UINT32_MAX / 2);
    if(!cRefs)
    {
        VBoxDispVHWACommandFree(pDev, pCmd);
    }
}
Esempio n. 10
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static uint32_t renderspuContextRelease( ContextInfo *context )
{
    uint32_t cRefs = ASMAtomicDecU32(&context->cRefs);
    if (!cRefs)
        renderspuDestroyContextTerminate( context );
    else
        CRASSERT(cRefs < UINT32_MAX/2);
    return cRefs;
}
Esempio n. 11
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static void vboxVhwaHlpOverlayListRemove(PVBOXMP_DEVEXT pDevExt, PVBOXWDDM_OVERLAY pOverlay)
{
    PVBOXWDDM_SOURCE pSource = &pDevExt->aSources[pOverlay->VidPnSourceId];
    KIRQL OldIrql;
    KeAcquireSpinLock(&pSource->OverlayListLock, &OldIrql);
    ASMAtomicDecU32(&pSource->cOverlays);
    RemoveEntryList(&pOverlay->ListEntry);
    KeReleaseSpinLock(&pSource->OverlayListLock, OldIrql);
}
/**
 * Release a reference, destroy the thing if necessary.
 *
 * @param   pThis       The semaphore.
 */
DECLINLINE(void) rtR0SemEventMultiDarwinRelease(PRTSEMEVENTMULTIINTERNAL pThis)
{
    if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
    {
        Assert(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC);
        lck_spin_destroy(pThis->pSpinlock, g_pDarwinLockGroup);
        RTMemFree(pThis);
    }
}
Esempio n. 13
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DECLINLINE(void) vbvaVhwaCommandRelease(PVBOXMP_DEVEXT pDevExt, VBOXVHWACMD* pCmd)
{
    uint32_t cRefs = ASMAtomicDecU32(&pCmd->cRefs);
    Assert(cRefs < UINT32_MAX / 2);
    if(!cRefs)
    {
        VBoxHGSMIBufferFree(&VBoxCommonFromDeviceExt(pDevExt)->guestCtx, pCmd);
    }
}
Esempio n. 14
0
DECLINLINE(VOID) vboxWddmSwapchainRelease(PVBOXWDDM_SWAPCHAIN pSwapchain)
{
    const uint32_t cRefs = ASMAtomicDecU32(&pSwapchain->cRefs);
    Assert(cRefs < UINT32_MAX/2);
    if (!cRefs)
    {
        vboxWddmMemFree(pSwapchain);
    }
}
Esempio n. 15
0
/**
 * Removes the thread from the AVL tree, call owns the tree lock
 * and has cleared the RTTHREADINT_FLAG_IN_TREE bit.
 *
 * @param   pThread     The thread to remove.
 */
static void rtThreadRemoveLocked(PRTTHREADINT pThread)
{
    PRTTHREADINT pThread2 = (PRTTHREADINT)RTAvlPVRemove(&g_ThreadTree, pThread->Core.Key);
#if !defined(RT_OS_OS2) /** @todo this asserts for threads created by NSPR */
    AssertMsg(pThread2 == pThread, ("%p(%s) != %p (%p/%s)\n", pThread2, pThread2  ? pThread2->szName : "<null>",
                                    pThread, pThread->Core.Key, pThread->szName));
#endif
    if (pThread2)
        ASMAtomicDecU32(&g_cThreadInTree);
}
Esempio n. 16
0
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->cNesting == 1);
    if (RT_FAILURE(rc9))
        return rc9;
#endif

    /*
     * Check if nested.
     */
    pthread_t Self = pthread_self();
    if (RT_UNLIKELY(    pThis->Owner != Self
                    ||  pThis->cNesting == 0))
    {
        AssertMsgFailed(("Not owner of mutex %p!! Self=%08x Owner=%08x cNesting=%d\n",
                         pThis, Self, pThis->Owner, pThis->cNesting));
        return VERR_NOT_OWNER;
    }

    /*
     * If nested we'll just pop a nesting.
     */
    if (pThis->cNesting > 1)
    {
        ASMAtomicDecU32(&pThis->cNesting);
        return VINF_SUCCESS;
    }

    /*
     * Clear the state. (cNesting == 1)
     */
    pThis->Owner = (pthread_t)-1;
    ASMAtomicWriteU32(&pThis->cNesting, 0);

    /*
     * Unlock mutex semaphore.
     */
    int rc = pthread_mutex_unlock(&pThis->Mutex);
    if (RT_UNLIKELY(rc))
    {
        AssertMsgFailed(("Failed to unlock mutex sem %p, rc=%d.\n", hMutexSem, rc)); NOREF(rc);
        return RTErrConvertFromErrno(rc);
    }

    return VINF_SUCCESS;
}
Esempio n. 17
0
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;
}
/**
 * Releases the instance data.
 *
 * @param   pThis               The instance data.
 */
static void rtDbgModDeferredReleaseInstanceData(PRTDBGMODDEFERRED pThis)
{
    AssertPtr(pThis);
    uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs); Assert(cRefs < 8);
    if (!cRefs)
    {
        RTDbgCfgRelease(pThis->hDbgCfg);
        pThis->hDbgCfg = NIL_RTDBGCFG;
        RTMemFree(pThis);
    }
}
/**
 * Close a file device previously opened by VBoxDrvFreeBSDOpen
 *
 * @returns 0 on success.
 * @param   pDev        The device.
 * @param   fFile       The file descriptor flags.
 * @param   DevType     The device type (CHR.
 * @param   pTd         The calling thread.
 */
static void VBoxDrvFreeBSDDtr(void *pData)
{
    PSUPDRVSESSION pSession = pData;
    Log(("VBoxDrvFreeBSDDtr: pSession=%p\n", pSession));

    /*
     * Close the session.
     */
    supdrvSessionRelease(pSession);
    ASMAtomicDecU32(&g_cUsers);
}
uint32_t SecretKey::release()
{
    uint32_t cRefs = ASMAtomicDecU32(&m_cRefs);
    if (!cRefs)
    {
        int rc = RTMemSaferScramble(m_pbKey, m_cbKey);
        AssertRC(rc);
    }

    return cRefs;
}
Esempio n. 21
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RTDECL(int) RTSemRWReleaseRead(RTSEMRW hRWSem)
{
    /*
     * Validate input.
     */
    struct RTSEMRWINTERNAL *pThis = hRWSem;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertMsgReturn(pThis->u32Magic == RTSEMRW_MAGIC,
                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
                    VERR_INVALID_HANDLE);

    /*
     * Check if it's the writer.
     */
    pthread_t Self = pthread_self();
    pthread_t Writer;
    ATOMIC_GET_PTHREAD_T(&pThis->Writer, &Writer);
    if (Writer == Self)
    {
        AssertMsgReturn(pThis->cWriterReads > 0, ("pThis=%p\n", pThis), VERR_NOT_OWNER);
#ifdef RTSEMRW_STRICT
        int rc9 = RTLockValidatorRecExclUnwindMixed(&pThis->ValidatorWrite, &pThis->ValidatorRead.Core);
        if (RT_FAILURE(rc9))
            return rc9;
#endif
        pThis->cWriterReads--;
        return VINF_SUCCESS;
    }

    /*
     * Try unlock it.
     */
#ifdef RTSEMRW_STRICT
    int rc9 = RTLockValidatorRecSharedCheckAndRelease(&pThis->ValidatorRead, RTThreadSelf());
    if (RT_FAILURE(rc9))
        return rc9;
#endif
#ifdef RT_OS_LINUX /* glibc (at least 2.8) may screw up when unlocking a lock we don't own. */
    if (ASMAtomicReadU32(&pThis->cReaders) == 0)
    {
        AssertMsgFailed(("Not owner of %p\n", pThis));
        return VERR_NOT_OWNER;
    }
#endif
    ASMAtomicDecU32(&pThis->cReaders);
    int rc = pthread_rwlock_unlock(&pThis->RWLock);
    if (rc)
    {
        ASMAtomicIncU32(&pThis->cReaders);
        AssertMsgFailed(("Failed read unlock read-write sem %p, rc=%d.\n", hRWSem, rc));
        return RTErrConvertFromErrno(rc);
    }
    return VINF_SUCCESS;
}
Esempio n. 22
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/**
 * Release a reference to the module.
 *
 * When the reference count reaches zero, the module is destroyed.
 *
 * @returns New reference count, UINT32_MAX on invalid handle (asserted).
 *
 * @param   hDbgMod         The module handle. The NIL handle is quietly ignored
 *                          and 0 is returned.
 *
 * @remarks Will not take any locks.
 */
RTDECL(uint32_t) RTDbgModRelease(RTDBGMOD hDbgMod)
{
    if (hDbgMod == NIL_RTDBGMOD)
        return 0;
    PRTDBGMODINT pDbgMod = hDbgMod;
    RTDBGMOD_VALID_RETURN_RC(pDbgMod, UINT32_MAX);

    uint32_t cRefs = ASMAtomicDecU32(&pDbgMod->cRefs);
    if (!cRefs)
        rtDbgModDestroy(pDbgMod);
    return cRefs;
}
Esempio n. 23
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INTNETR3DECL(int) SUPR0ObjRelease(void *pvObj, PSUPDRVSESSION pSession)
{
    RTTEST_CHECK_RET(g_hTest, pSession == g_pSession, VERR_INVALID_PARAMETER);
    POBJREF pRef = (POBJREF)pvObj;
    if (!ASMAtomicDecU32(&pRef->cRefs))
    {
        pRef->pfnDestructor(pRef, pRef->pvUser1, pRef->pvUser2);
        RTTestGuardedFree(g_hTest, pRef);
        return VINF_OBJECT_DESTROYED;
    }
    return VINF_SUCCESS;
}
Esempio n. 24
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/**
 * Destroys the per thread data.
 *
 * @param   pThread     The thread to destroy.
 */
static void rtThreadDestroy(PRTTHREADINT pThread)
{
    RTSEMEVENTMULTI hEvt1, hEvt2;
    /*
     * Remove it from the tree and mark it as dead.
     *
     * Threads that has seen rtThreadTerminate and should already have been
     * removed from the tree. There is probably no thread that  should
     * require removing here. However, be careful making sure that cRefs
     * isn't 0 if we do or we'll blow up because the strict locking code
     * will be calling us back.
     */
    if (ASMBitTest(&pThread->fIntFlags, RTTHREADINT_FLAG_IN_TREE_BIT))
    {
        ASMAtomicIncU32(&pThread->cRefs);
        rtThreadRemove(pThread);
        ASMAtomicDecU32(&pThread->cRefs);
    }

    /*
     * Invalidate the thread structure.
     */
#ifdef IN_RING3
    rtLockValidatorSerializeDestructEnter();

    rtLockValidatorDeletePerThread(&pThread->LockValidator);
#endif
#ifdef RT_WITH_ICONV_CACHE
    rtStrIconvCacheDestroy(pThread);
#endif
    ASMAtomicXchgU32(&pThread->u32Magic, RTTHREADINT_MAGIC_DEAD);
    ASMAtomicWritePtr(&pThread->Core.Key, (void *)NIL_RTTHREAD);
    pThread->enmType         = RTTHREADTYPE_INVALID;
    hEvt1    = pThread->EventUser;
    pThread->EventUser       = NIL_RTSEMEVENTMULTI;
    hEvt2    = pThread->EventTerminated;
    pThread->EventTerminated = NIL_RTSEMEVENTMULTI;

#ifdef IN_RING3
    rtLockValidatorSerializeDestructLeave();
#endif

    /*
     * Destroy semaphore resources and free the bugger.
     */
    RTSemEventMultiDestroy(hEvt1);
    if (hEvt2 != NIL_RTSEMEVENTMULTI)
        RTSemEventMultiDestroy(hEvt2);

    rtThreadNativeDestroy(pThread);
    RTMemFree(pThread);
}
Esempio n. 25
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static DECLCALLBACK(void) AsyncTaskCompleted(PVM pVM, void *pvUser, void *pvUser2, int rc)
{
    LogFlow((TESTCASE ": %s: pVM=%p pvUser=%p pvUser2=%p\n", __FUNCTION__, pVM, pvUser, pvUser2));
    NOREF(rc);

    uint32_t cTasksStillLeft = ASMAtomicDecU32(&g_cTasksLeft);

    if (!cTasksStillLeft)
    {
        /* All tasks processed. Wakeup main. */
        RTSemEventSignal(g_FinishedEventSem);
    }
}
RTDECL(uint32_t) RTKrnlModInfoRelease(RTKRNLMODINFO hKrnlModInfo)
{
    PRTKRNLMODINFOINT pThis = hKrnlModInfo;
    if (!pThis)
        return 0;
    AssertPtrReturn(pThis, UINT32_MAX);

    uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
    AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis));
    if (cRefs == 0)
        rtKrnlModInfoDestroy(pThis);
    return cRefs;
}
Esempio n. 27
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/**
 * Prepare non-blocking mode.
 *
 * @returns VINF_SUCCESS
 * @retval  VERR_WRONG_ORDER
 * @retval  VERR_INTERNAL_ERROR_4
 *
 * @param   pThis               The pipe handle.
 */
static int rtPipeTryNonBlocking(RTPIPEINTERNAL *pThis)
{
    /*
     * Update the state.
     */
    for (;;)
    {
        uint32_t        u32State    = ASMAtomicReadU32(&pThis->u32State);
        uint32_t const  u32StateOld = u32State;
        uint32_t const  cUsers      = (u32State & RTPIPE_POSIX_USERS_MASK);

        if (!(u32State & RTPIPE_POSIX_BLOCKING))
        {
            AssertReturn(cUsers < RTPIPE_POSIX_USERS_MASK / 2, VERR_INTERNAL_ERROR_4);
            u32State &= ~RTPIPE_POSIX_USERS_MASK;
            u32State |= cUsers + 1;
            if (ASMAtomicCmpXchgU32(&pThis->u32State, u32State, u32StateOld))
            {
                if (u32State & RTPIPE_POSIX_SWITCHING)
                    break;
                return VINF_SUCCESS;
            }
        }
        else if (cUsers == 0)
        {
            u32State = 1 | RTPIPE_POSIX_SWITCHING;
            if (ASMAtomicCmpXchgU32(&pThis->u32State, u32State, u32StateOld))
                break;
        }
        else
            return VERR_WRONG_ORDER;
        ASMNopPause();
    }

    /*
     * Do the switching.
     */
    int fFlags = fcntl(pThis->fd, F_GETFL, 0);
    if (fFlags != -1)
    {
        if (    (fFlags & O_NONBLOCK)
            ||  fcntl(pThis->fd, F_SETFL, fFlags | O_NONBLOCK) != -1)
        {
            ASMAtomicBitClear(&pThis->u32State, RTPIPE_POSIX_SWITCHING_BIT);
            return VINF_SUCCESS;
        }
    }

    ASMAtomicDecU32(&pThis->u32State);
    return RTErrConvertFromErrno(errno);
}
Esempio n. 28
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VBGLR3DECL(void) VbglR3Term(void)
{
    /*
     * Decrement the reference count and see if we're the last one out.
     */
    uint32_t cInits = ASMAtomicDecU32(&g_cInits);
    if (cInits > 0)
        return;
#if !defined(VBOX_VBGLR3_XSERVER)
    AssertReturnVoid(!cInits);

# if defined(RT_OS_WINDOWS)
    HANDLE hFile = g_hFile;
    g_hFile = INVALID_HANDLE_VALUE;
    AssertReturnVoid(hFile != INVALID_HANDLE_VALUE);
    BOOL fRc = CloseHandle(hFile);
    Assert(fRc); NOREF(fRc);

# elif defined(RT_OS_OS2)
    RTFILE File = g_File;
    g_File = NIL_RTFILE;
    AssertReturnVoid(File != NIL_RTFILE);
    APIRET rc = DosClose((uintptr_t)File);
    AssertMsg(!rc, ("%ld\n", rc));

#elif defined(RT_OS_DARWIN)
    io_connect_t    uConnection = g_uConnection;
    RTFILE          hFile       = g_File;
    g_uConnection = 0;
    g_File        = NIL_RTFILE;
    kern_return_t kr = IOServiceClose(uConnection);
    AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr));
    int rc = RTFileClose(hFile);
    AssertRC(rc);

# else /* The IPRT case. */
    RTFILE File = g_File;
    g_File = NIL_RTFILE;
    AssertReturnVoid(File != NIL_RTFILE);
    int rc = RTFileClose(File);
    AssertRC(rc);
# endif

#else  /* VBOX_VBGLR3_XSERVER */
    int File = g_File;
    g_File = -1;
    if (File == -1)
        return;
    xf86close(File);
#endif /* VBOX_VBGLR3_XSERVER */
}
Esempio n. 29
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/**
 * @callback_method_impl{dtrace_pops_t,dtps_disable}
 */
static void     vboxDtPOps_Disable(void *pvProv, dtrace_id_t idProbe, void *pvProbe)
{
    PSUPDRVVDTPROVIDERCORE  pProv  = (PSUPDRVVDTPROVIDERCORE)pvProv;
    AssertPtrReturnVoid(pProv);
    LOG_DTRACE(("%s: %p / %p - %#x / %p\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe));
    AssertPtrReturnVoid(pProv->TracerData.DTrace.idProvider);

    if (!pProv->TracerData.DTrace.fZombie)
    {
        uint32_t        idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
        PVTGPROBELOC32  pProbeLocEn = (PVTGPROBELOC32)(  (uintptr_t)pProv->pvProbeLocsEn + idxProbeLoc * pProv->cbProbeLocsEn);
        PCVTGPROBELOC   pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
        PCVTGDESCPROBE  pProbeDesc  = pProbeLocRO->pProbe;
        uint32_t const  idxProbe    = pProbeDesc->idxEnabled;

        if (!pProv->fUmod)
        {
            if (pProbeLocEn->fEnabled)
            {
                pProbeLocEn->fEnabled = 0;
                ASMAtomicDecU32(&pProv->pacProbeEnabled[idxProbe]);
            }
        }
        else
        {
            /* Update kernel mode structure */
            if (pProv->paR0ProbeLocs[idxProbeLoc].fEnabled)
            {
                pProv->paR0ProbeLocs[idxProbeLoc].fEnabled = 0;
                ASMAtomicDecU32(&pProv->paR0Probes[idxProbe].cEnabled);
            }

            /* Update user mode structure. */
            pProbeLocEn->fEnabled = 0;
            pProv->pacProbeEnabled[idxProbe] = pProv->paR0Probes[idxProbe].cEnabled;
        }
    }
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
    /*
     * Validate.
     */
    RTSEMMUTEXINTERNAL *pThis = hMutexSem;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);

    /*
     * Check ownership and recursions.
     */
    RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
    RTNATIVETHREAD hNativeOwner;
    ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner);
    if (RT_UNLIKELY(hNativeOwner != hNativeSelf))
    {
        AssertMsgFailed(("Not owner of mutex %p!! hNativeSelf=%RTntrd Owner=%RTntrd cRecursions=%d\n",
                         pThis, hNativeSelf, hNativeOwner, pThis->cRecursions));
        return VERR_NOT_OWNER;
    }
    if (pThis->cRecursions > 1)
    {
#ifdef RTSEMMUTEX_STRICT
        int rc9 = RTLockValidatorRecExclUnwind(&pThis->ValidatorRec);
        if (RT_FAILURE(rc9))
            return rc9;
#endif
        ASMAtomicDecU32(&pThis->cRecursions);
        return VINF_SUCCESS;
    }

    /*
     * Unlock mutex semaphore.
     */
#ifdef RTSEMMUTEX_STRICT
    int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, false);
    if (RT_FAILURE(rc9))
        return rc9;
#endif
    ASMAtomicWriteU32(&pThis->cRecursions, 0);
    ASMAtomicWriteHandle(&pThis->hNativeOwner, NIL_RTNATIVETHREAD);

    if (ReleaseMutex(pThis->hMtx))
        return VINF_SUCCESS;

    int rc = RTErrConvertFromWin32(GetLastError());
    AssertMsgFailed(("%p/%p, rc=%Rrc lasterr=%d\n", pThis, pThis->hMtx, rc, GetLastError()));
    return rc;
}