sal/osl/w32/mutex.cxx

   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 <sal/config.h>
  21
  22 #include "system.h"
  23
  24 #include <osl/mutex.h>
  25 #include <osl/diagnose.h>
  26
  27 /*
  28     Implementation notes:
  29     The void* hidden by oslMutex points to a WIN32
  30     CRITICAL_SECTION structure.
  31 */
  32
  33 oslMutex SAL_CALL osl_createMutex(void)
  34 {
  35     CRITICAL_SECTION* pMutexImpl;
  36
  37     pMutexImpl = static_cast<CRITICAL_SECTION*>(calloc(sizeof(CRITICAL_SECTION), 1));
  38
  39     OSL_ASSERT(pMutexImpl); /* alloc successful? */
  40
  41     InitializeCriticalSection(pMutexImpl);
  42
  43     return reinterpret_cast<oslMutex>(pMutexImpl);
  44 }
  45
  46 void SAL_CALL osl_destroyMutex(oslMutex Mutex)
  47 {
  48     CRITICAL_SECTION* pMutexImpl = reinterpret_cast<CRITICAL_SECTION*>(Mutex);
  49
  50     if (pMutexImpl)
  51     {
  52         DeleteCriticalSection(pMutexImpl);
  53         free(pMutexImpl);
  54     }
  55 }
  56
  57 sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex)
  58 {
  59     CRITICAL_SECTION* pMutexImpl = reinterpret_cast<CRITICAL_SECTION*>(Mutex);
  60
  61     OSL_ASSERT(Mutex);
  62
  63     EnterCriticalSection(pMutexImpl);
  64
  65     return true;
  66 }
  67
  68 sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex)
  69 {
  70     CRITICAL_SECTION* pMutexImpl = reinterpret_cast<CRITICAL_SECTION*>(Mutex);
  71
  72     OSL_ASSERT(Mutex);
  73
  74     return TryEnterCriticalSection(pMutexImpl) != FALSE;
  75 }
  76
  77 sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex)
  78 {
  79     CRITICAL_SECTION* pMutexImpl = reinterpret_cast<CRITICAL_SECTION*>(Mutex);
  80
  81     OSL_ASSERT(Mutex);
  82
  83     LeaveCriticalSection(pMutexImpl);
  84
  85     return true;
  86 }
  87
  88 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */