sal/osl/w32/mutex.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "system.h"
  21
  22 #include <osl/mutex.h>
  23 #include <osl/diagnose.h>
  24
  25 /*
  26     Implementation notes:
  27     The void* hidden by oslMutex points to a WIN32
  28     CRITICAL_SECTION structure.
  29 */
  30
  31 /*****************************************************************************/
  32 /* osl_createMutex */
  33 /*****************************************************************************/
  34 oslMutex SAL_CALL osl_createMutex(void)
  35 {
  36     CRITICAL_SECTION *pMutexImpl;
  37
  38     pMutexImpl = calloc(sizeof(CRITICAL_SECTION), 1);
  39
  40     OSL_ASSERT(pMutexImpl); /* alloc successful? */
  41
  42     InitializeCriticalSection(pMutexImpl);
  43
  44     return (oslMutex)pMutexImpl;
  45 }
  46
  47 /*****************************************************************************/
  48 /* osl_destroyMutex */
  49 /*****************************************************************************/
  50 void SAL_CALL osl_destroyMutex(oslMutex Mutex)
  51 {
  52     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  53
  54     if (pMutexImpl)
  55     {
  56         DeleteCriticalSection(pMutexImpl);
  57         free(pMutexImpl);
  58     }
  59 }
  60
  61 /*****************************************************************************/
  62 /* osl_acquireMutex */
  63 /*****************************************************************************/
  64 sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex)
  65 {
  66     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  67
  68     OSL_ASSERT(Mutex);
  69
  70     EnterCriticalSection(pMutexImpl);
  71
  72     return sal_True;
  73 }
  74
  75 /*****************************************************************************/
  76 /* osl_tryToAcquireMutex */
  77 /*****************************************************************************/
  78 sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex)
  79 {
  80     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  81
  82     OSL_ASSERT(Mutex);
  83
  84     return (sal_Bool)(TryEnterCriticalSection(pMutexImpl) != FALSE);
  85 }
  86
  87 /*****************************************************************************/
  88 /* osl_releaseMutex */
  89 /*****************************************************************************/
  90 sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex)
  91 {
  92     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  93
  94     OSL_ASSERT(Mutex);
  95
  96     LeaveCriticalSection(pMutexImpl);
  97
  98     return sal_True;
  99 }
 100
 101 /*****************************************************************************/
 102 /* osl_getGlobalMutex */
 103 /*****************************************************************************/
 104
 105 /* initialized in dllentry.c */
 106 oslMutex g_Mutex;
 107
 108 oslMutex * SAL_CALL osl_getGlobalMutex(void)
 109 {
 110     return &g_Mutex;
 111 }
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */