Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 281 insertions, 0 deletions

diff --git a/src/VBox/Runtime/r0drv/os2/semeventmulti-r0drv-os2.cpp b/src/VBox/Runtime/r0drv/os2/semeventmulti-r0drv-os2.cpp
new file mode 100644
index 00000000..c7f8bfbd
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/os2/semeventmulti-r0drv-os2.cpp
@@ -0,0 +1,281 @@
+/* $Id: semeventmulti-r0drv-os2.cpp $ */
+/** @file
+ * IPRT - Multiple Release Event Semaphores, Ring-0 Driver, OS/2.
+ */
+
+/*
+ * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-os2-kernel.h"
+#include "internal/iprt.h"
+
+#include <iprt/semaphore.h>
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/lockvalidator.h>
+#include <iprt/mem.h>
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/**
+ * OS/2 multiple release event semaphore.
+ */
+typedef struct RTSEMEVENTMULTIINTERNAL
+{
+    /** Magic value (RTSEMEVENTMULTI_MAGIC). */
+    uint32_t volatile   u32Magic;
+    /** The number of waiting threads. */
+    uint32_t volatile   cWaiters;
+    /** Set if the event object is signaled. */
+    uint8_t volatile    fSignaled;
+    /** The number of threads in the process of waking up. */
+    uint32_t volatile   cWaking;
+    /** The OS/2 spinlock protecting this structure. */
+    SpinLock_t          Spinlock;
+} RTSEMEVENTMULTIINTERNAL, *PRTSEMEVENTMULTIINTERNAL;
+
+
+RTDECL(int)  RTSemEventMultiCreate(PRTSEMEVENTMULTI phEventMultiSem)
+{
+    return RTSemEventMultiCreateEx(phEventMultiSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
+}
+
+
+RTDECL(int)  RTSemEventMultiCreateEx(PRTSEMEVENTMULTI phEventMultiSem, uint32_t fFlags, RTLOCKVALCLASS hClass,
+                                     const char *pszNameFmt, ...)
+{
+    AssertReturn(!(fFlags & ~RTSEMEVENTMULTI_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER);
+    AssertPtrReturn(phEventMultiSem, VERR_INVALID_POINTER);
+
+    AssertCompile(sizeof(RTSEMEVENTMULTIINTERNAL) > sizeof(void *));
+    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)RTMemAlloc(sizeof(*pThis));
+    if (pThis)
+    {
+        pThis->u32Magic = RTSEMEVENTMULTI_MAGIC;
+        pThis->cWaiters = 0;
+        pThis->cWaking = 0;
+        pThis->fSignaled = 0;
+        KernAllocSpinLock(&pThis->Spinlock);
+
+        *phEventMultiSem = pThis;
+        return VINF_SUCCESS;
+    }
+    RT_NOREF(hClass, pszNameFmt);
+    return VERR_NO_MEMORY;
+}
+
+
+RTDECL(int)  RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
+{
+    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
+    if (pThis == NIL_RTSEMEVENTMULTI)
+        return VINF_SUCCESS;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+    KernAcquireSpinLock(&pThis->Spinlock);
+    ASMAtomicIncU32(&pThis->u32Magic); /* make the handle invalid */
+    if (pThis->cWaiters > 0)
+    {
+        /* abort waiting thread, last man cleans up. */
+        ASMAtomicXchgU32(&pThis->cWaking, pThis->cWaking + pThis->cWaiters);
+        ULONG cThreads;
+        KernWakeup((ULONG)pThis, WAKEUP_DATA | WAKEUP_BOOST, &cThreads, (ULONG)VERR_SEM_DESTROYED);
+        KernReleaseSpinLock(&pThis->Spinlock);
+    }
+    else if (pThis->cWaking)
+        /* the last waking thread is gonna do the cleanup */
+        KernReleaseSpinLock(&pThis->Spinlock);
+    else
+    {
+        KernReleaseSpinLock(&pThis->Spinlock);
+        KernFreeSpinLock(&pThis->Spinlock);
+        RTMemFree(pThis);
+    }
+
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int)  RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
+{
+    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
+                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
+                    VERR_INVALID_HANDLE);
+
+    KernAcquireSpinLock(&pThis->Spinlock);
+
+    ASMAtomicXchgU8(&pThis->fSignaled, true);
+    if (pThis->cWaiters > 0)
+    {
+        ASMAtomicXchgU32(&pThis->cWaking, pThis->cWaking + pThis->cWaiters);
+        ASMAtomicXchgU32(&pThis->cWaiters, 0);
+        ULONG cThreads;
+        KernWakeup((ULONG)pThis, WAKEUP_DATA, &cThreads, VINF_SUCCESS);
+    }
+
+    KernReleaseSpinLock(&pThis->Spinlock);
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int)  RTSemEventMultiReset(RTSEMEVENTMULTI hEventMultiSem)
+{
+    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
+                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
+                    VERR_INVALID_HANDLE);
+
+    KernAcquireSpinLock(&pThis->Spinlock);
+    ASMAtomicXchgU8(&pThis->fSignaled, false);
+    KernReleaseSpinLock(&pThis->Spinlock);
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Worker for RTSemEventWaitEx and RTSemEventWaitExDebug.
+ *
+ * @returns VBox status code.
+ * @param   pThis           The event semaphore.
+ * @param   fFlags          See RTSemEventWaitEx.
+ * @param   uTimeout        See RTSemEventWaitEx.
+ * @param   pSrcPos         The source code position of the wait.
+ */
+static int rtR0SemEventMultiOs2Wait(PRTSEMEVENTMULTIINTERNAL pThis, uint32_t fFlags, uint64_t uTimeout,
+                                    PCRTLOCKVALSRCPOS pSrcPos)
+{
+    RT_NOREF(pSrcPos);
+
+    /*
+     * Validate and convert the input.
+     */
+    if (!pThis)
+        return VERR_INVALID_HANDLE;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
+                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
+                    VERR_INVALID_HANDLE);
+    AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);
+
+    ULONG cMsTimeout = rtR0SemWaitOs2ConvertTimeout(fFlags, uTimeout);
+    ULONG fBlock     = BLOCK_SPINLOCK;
+    if (!(fFlags & RTSEMWAIT_FLAGS_INTERRUPTIBLE))
+        fBlock |= BLOCK_UNINTERRUPTABLE;
+
+    /*
+     * Do the job.
+     */
+    KernAcquireSpinLock(&pThis->Spinlock);
+
+    int rc;
+    if (pThis->fSignaled)
+        rc = VINF_SUCCESS;
+    else
+    {
+        ASMAtomicIncU32(&pThis->cWaiters);
+
+        ULONG ulData = (ULONG)VERR_INTERNAL_ERROR;
+        rc = KernBlock((ULONG)pThis, cMsTimeout, fBlock,
+                       &pThis->Spinlock,
+                       &ulData);
+        switch (rc)
+        {
+            case NO_ERROR:
+                rc = (int)ulData;
+                Assert(rc == VINF_SUCCESS || rc == VERR_SEM_DESTROYED);
+                Assert(pThis->cWaking > 0);
+                if (    !ASMAtomicDecU32(&pThis->cWaking)
+                    &&  pThis->u32Magic != RTSEMEVENTMULTI_MAGIC)
+                {
+                    /* The event was destroyed (ulData == VINF_SUCCESS if it was after we awoke), as
+                       the last thread do the cleanup. */
+                    KernReleaseSpinLock(&pThis->Spinlock);
+                    KernFreeSpinLock(&pThis->Spinlock);
+                    RTMemFree(pThis);
+                    return VINF_SUCCESS;
+                }
+                rc = VINF_SUCCESS;
+                break;
+
+            case ERROR_TIMEOUT:
+                Assert(cMsTimeout != SEM_INDEFINITE_WAIT);
+                ASMAtomicDecU32(&pThis->cWaiters);
+                rc = VERR_TIMEOUT;
+                break;
+
+            case ERROR_INTERRUPT:
+                Assert(fFlags & RTSEMWAIT_FLAGS_INTERRUPTIBLE);
+                ASMAtomicDecU32(&pThis->cWaiters);
+                rc = VERR_INTERRUPTED;
+                break;
+
+            default:
+                AssertMsgFailed(("rc=%d\n", rc));
+                rc = VERR_GENERAL_FAILURE;
+                break;
+        }
+    }
+
+    KernReleaseSpinLock(&pThis->Spinlock);
+    return rc;
+}
+
+
+RTDECL(int)  RTSemEventMultiWaitEx(RTSEMEVENTMULTI hEventMultiSem, uint32_t fFlags, uint64_t uTimeout)
+{
+#ifndef RTSEMEVENT_STRICT
+    return rtR0SemEventMultiOs2Wait(hEventMultiSem, fFlags, uTimeout, NULL);
+#else
+    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API();
+    return rtR0SemEventMultiOs2Wait(hEventMultiSem, fFlags, uTimeout, &SrcPos);
+#endif
+}
+
+
+RTDECL(int)  RTSemEventMultiWaitExDebug(RTSEMEVENTMULTI hEventMultiSem, uint32_t fFlags, uint64_t uTimeout,
+                                        RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API();
+    return rtR0SemEventMultiOs2Wait(hEventMultiSem, fFlags, uTimeout, &SrcPos);
+}
+
+
+RTDECL(uint32_t) RTSemEventMultiGetResolution(void)
+{
+    return 32000000; /* 32ms */
+}
+