1 files changed, 236 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/nt/semmutex-r0drv-nt.cpp b/src/VBox/Runtime/r0drv/nt/semmutex-r0drv-nt.cpp
new file mode 100644
index 00000000..62f9a00a
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/nt/semmutex-r0drv-nt.cpp
@@ -0,0 +1,236 @@
+/* $Id: semmutex-r0drv-nt.cpp $ */
+/** @file
+ * IPRT - Mutex Semaphores, Ring-0 Driver, NT.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define RTSEMMUTEX_WITHOUT_REMAPPING
+#include "the-nt-kernel.h"
+#include <iprt/semaphore.h>
+#include <iprt/alloc.h>
+#include <iprt/assert.h>
+#include <iprt/asm.h>
+#include <iprt/err.h>
+
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/**
+ * NT mutex semaphore.
+ */
+typedef struct RTSEMMUTEXINTERNAL
+{
+    /** Magic value (RTSEMMUTEX_MAGIC). */
+    uint32_t volatile   u32Magic;
+#ifdef RT_USE_FAST_MUTEX
+    /** The fast mutex object. */
+    FAST_MUTEX          Mutex;
+#else
+    /** The NT Mutex object. */
+    KMUTEX              Mutex;
+#endif
+} RTSEMMUTEXINTERNAL, *PRTSEMMUTEXINTERNAL;
+
+
+
+RTDECL(int)  RTSemMutexCreate(PRTSEMMUTEX phMutexSem)
+{
+    return RTSemMutexCreateEx(phMutexSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, NULL);
+}
+
+
+RTDECL(int) RTSemMutexCreateEx(PRTSEMMUTEX phMutexSem, uint32_t fFlags,
+                               RTLOCKVALCLASS hClass, uint32_t uSubClass, const char *pszNameFmt, ...)
+{
+    AssertReturn(!(fFlags & ~RTSEMMUTEX_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER);
+    RT_NOREF3(hClass, uSubClass, pszNameFmt);
+
+    AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
+    PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)RTMemAlloc(sizeof(*pThis));
+    if (!pThis)
+        return VERR_NO_MEMORY;
+
+    pThis->u32Magic = RTSEMMUTEX_MAGIC;
+#ifdef RT_USE_FAST_MUTEX
+    ExInitializeFastMutex(&pThis->Mutex);
+#else
+    KeInitializeMutex(&pThis->Mutex, 0);
+#endif
+
+    *phMutexSem = pThis;
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
+{
+    /*
+     * Validate input.
+     */
+    PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
+    if (pThis == NIL_RTSEMMUTEX)
+        return VINF_SUCCESS;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
+
+    /*
+     * Invalidate it and signal the object just in case.
+     */
+    AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
+    RTMemFree(pThis);
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Internal worker for RTSemMutexRequest and RTSemMutexRequestNoResume
+ *
+ * @returns IPRT status code.
+ * @param   hMutexSem            The mutex handle.
+ * @param   cMillies            The timeout.
+ * @param   fInterruptible      Whether it's interruptible
+ *                              (RTSemMutexRequestNoResume) or not
+ *                              (RTSemMutexRequest).
+ */
+static int rtSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, BOOLEAN fInterruptible)
+{
+    /*
+     * Validate input.
+     */
+    PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
+
+    /*
+     * Get the mutex.
+     */
+#ifdef RT_USE_FAST_MUTEX
+    AssertMsg(cMillies == RT_INDEFINITE_WAIT, ("timeouts are not supported when using fast mutexes!\n"));
+    ExAcquireFastMutex(&pThis->Mutex);
+    return VINF_SUCCESS;
+
+#else  /* !RT_USE_FAST_MUTEX */
+    NTSTATUS rcNt;
+    if (cMillies == RT_INDEFINITE_WAIT)
+        rcNt = KeWaitForSingleObject(&pThis->Mutex, Executive, KernelMode, fInterruptible, NULL);
+    else
+    {
+        LARGE_INTEGER Timeout;
+        Timeout.QuadPart = -(int64_t)cMillies * 10000;
+        rcNt = KeWaitForSingleObject(&pThis->Mutex, Executive, KernelMode, fInterruptible, &Timeout);
+    }
+    switch (rcNt)
+    {
+        case STATUS_SUCCESS:
+            if (pThis->u32Magic == RTSEMMUTEX_MAGIC)
+                return VINF_SUCCESS;
+            return VERR_SEM_DESTROYED;
+
+        case STATUS_ALERTED:
+        case STATUS_USER_APC:
+            Assert(fInterruptible);
+            return VERR_INTERRUPTED;
+
+        case STATUS_TIMEOUT:
+            return VERR_TIMEOUT;
+
+        default:
+            AssertMsgFailed(("pThis->u32Magic=%RX32 pThis=%p: wait returned %lx!\n",
+                             pThis->u32Magic, pThis, (long)rcNt));
+            return VERR_INTERNAL_ERROR;
+    }
+#endif /* !RT_USE_FAST_MUTEX */
+}
+
+
+RTDECL(int) RTSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
+{
+    return rtSemMutexRequest(hMutexSem, cMillies, FALSE /*fInterruptible*/);
+}
+
+
+RTDECL(int) RTSemMutexRequestDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+    RT_NOREF1(uId); RT_SRC_POS_NOREF();
+    return RTSemMutexRequest(hMutexSem, cMillies);
+}
+
+
+RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
+{
+    return rtSemMutexRequest(hMutexSem, cMillies, TRUE /*fInterruptible*/);
+}
+
+
+RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+    RT_NOREF1(uId); RT_SRC_POS_NOREF();
+    return RTSemMutexRequestNoResume(hMutexSem, cMillies);
+}
+
+
+RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
+{
+    /*
+     * Validate input.
+     */
+    PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
+
+    /*
+     * Release the mutex.
+     */
+#ifdef RT_USE_FAST_MUTEX
+    ExReleaseFastMutex(&pThis->Mutex);
+#else
+    KeReleaseMutex(&pThis->Mutex, FALSE /*Wait*/);
+#endif
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem)
+{
+    /*
+     * Validate.
+     */
+    RTSEMMUTEXINTERNAL *pThis = hMutexSem;
+    AssertPtrReturn(pThis, false);
+    AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, false);
+
+#ifdef RT_USE_FAST_MUTEX
+    return pThis->Mutex && pThis->Mutex->Owner != NULL;
+#else
+    return KeReadStateMutex(&pThis->Mutex) == 1;
+#endif
+}
+