| 1 | /* $Id: semevent-win.cpp 25381 2009-12-14 23:52:28Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Event Sempahore, Windows.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2009 Sun Microsystems, Inc.
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | *
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| 26 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 28 | * additional information or have any questions.
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| 29 | */
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Header Files *
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| 34 | *******************************************************************************/
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| 35 | #define LOG_GROUP RTLOGGROUP_SEMAPHORE
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| 36 | #include <Windows.h>
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| 37 |
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| 38 | #include <iprt/semaphore.h>
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| 39 | #include <iprt/thread.h>
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| 40 | #include <iprt/assert.h>
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| 41 | #include <iprt/err.h>
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| 42 | #include "internal/strict.h"
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| 43 |
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| 44 |
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| 45 | /*******************************************************************************
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| 46 | * Defined Constants And Macros *
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| 47 | *******************************************************************************/
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| 48 | /** Converts semaphore to win32 handle. */
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| 49 | #define SEM2HND(Sem) ((HANDLE)(uintptr_t)Sem)
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| 50 |
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| 51 |
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| 52 | /* Undefine debug mappings. */
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| 53 | #undef RTSemEventWait
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| 54 | #undef RTSemEventWaitNoResume
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| 55 |
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| 56 |
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| 57 | RTDECL(int) RTSemEventCreate(PRTSEMEVENT pEventSem)
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| 58 | {
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| 59 | /*
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| 60 | * Create the semaphore.
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| 61 | * (Auto reset, not signaled, private event object.)
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| 62 | */
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| 63 | HANDLE hev = CreateEvent(NULL, FALSE, FALSE, NULL);
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| 64 | if (hev)
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| 65 | {
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| 66 | *pEventSem = (RTSEMEVENT)(void *)hev;
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| 67 | Assert(*pEventSem != NIL_RTSEMEVENT);
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| 68 | return VINF_SUCCESS;
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| 69 | }
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| 70 | return RTErrConvertFromWin32(GetLastError());
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| 71 | }
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| 72 |
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| 73 |
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| 74 | RTDECL(int) RTSemEventDestroy(RTSEMEVENT EventSem)
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| 75 | {
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| 76 | if (EventSem == NIL_RTSEMEVENT) /* don't bitch */
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| 77 | return VERR_INVALID_HANDLE;
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| 78 |
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| 79 | /*
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| 80 | * Close semaphore handle.
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| 81 | */
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| 82 | if (CloseHandle(SEM2HND(EventSem)))
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| 83 | return VINF_SUCCESS;
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| 84 | AssertMsgFailed(("Destroy EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
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| 85 | return RTErrConvertFromWin32(GetLastError());
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| 86 | }
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| 87 |
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| 88 |
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| 89 | RTDECL(int) RTSemEventWaitNoResume(RTSEMEVENT EventSem, unsigned cMillies)
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| 90 | {
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| 91 | /*
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| 92 | * Wait for condition.
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| 93 | */
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| 94 | int rc = WaitForSingleObjectEx(SEM2HND(EventSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
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| 95 | switch (rc)
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| 96 | {
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| 97 | case WAIT_OBJECT_0: return VINF_SUCCESS;
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| 98 | case WAIT_TIMEOUT: return VERR_TIMEOUT;
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| 99 | case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
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| 100 | case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
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| 101 | default:
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| 102 | {
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| 103 | AssertMsgFailed(("Wait on EventSem %p failed, rc=%d lasterr=%d\n", EventSem, rc, GetLastError()));
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| 104 | int rc2 = RTErrConvertFromWin32(GetLastError());
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| 105 | if (rc2)
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| 106 | return rc2;
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| 107 |
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| 108 | AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
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| 109 | return VERR_INTERNAL_ERROR;
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| 110 | }
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| 111 | }
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| 112 | }
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| 113 |
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| 114 |
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| 115 | RTDECL(int) RTSemEventSignal(RTSEMEVENT EventSem)
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| 116 | {
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| 117 | /*
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| 118 | * Signal the object.
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| 119 | */
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| 120 | if (SetEvent(SEM2HND(EventSem)))
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| 121 | return VINF_SUCCESS;
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| 122 | AssertMsgFailed(("Signaling EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
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| 123 | return RTErrConvertFromWin32(GetLastError());
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| 124 | }
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| 125 |
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