sal/osl/w32/mutex.c

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  28
  29 #include "system.h"
  30
  31 #include <osl/mutex.h>
  32 #include <osl/diagnose.h>
  33
  34 /*
  35     Implementation notes:
  36     The void* hidden by oslMutex points to a WIN32
  37     CRITICAL_SECTION structure.
  38 */
  39
  40 /*****************************************************************************/
  41 /* osl_createMutex */
  42 /*****************************************************************************/
  43 oslMutex SAL_CALL osl_createMutex(void)
  44 {
  45     CRITICAL_SECTION *pMutexImpl;
  46
  47     pMutexImpl = calloc(sizeof(CRITICAL_SECTION), 1);
  48
  49     OSL_ASSERT(pMutexImpl); /* alloc successful? */
  50
  51     InitializeCriticalSection(pMutexImpl);
  52
  53     return (oslMutex)pMutexImpl;
  54 }
  55
  56 /*****************************************************************************/
  57 /* osl_destroyMutex */
  58 /*****************************************************************************/
  59 void SAL_CALL osl_destroyMutex(oslMutex Mutex)
  60 {
  61     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  62
  63     if (pMutexImpl)
  64     {
  65         DeleteCriticalSection(pMutexImpl);
  66         free(pMutexImpl);
  67     }
  68 }
  69
  70 /*****************************************************************************/
  71 /* osl_acquireMutex */
  72 /*****************************************************************************/
  73 sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex)
  74 {
  75     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  76
  77     OSL_ASSERT(Mutex);
  78
  79     EnterCriticalSection(pMutexImpl);
  80
  81     return sal_True;
  82 }
  83
  84 /*****************************************************************************/
  85 /* osl_tryToAcquireMutex */
  86 /*****************************************************************************/
  87 sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex)
  88 {
  89     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
  90
  91     OSL_ASSERT(Mutex);
  92
  93     return (sal_Bool)(TryEnterCriticalSection(pMutexImpl) != FALSE);
  94 }
  95
  96 /*****************************************************************************/
  97 /* osl_releaseMutex */
  98 /*****************************************************************************/
  99 sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex)
 100 {
 101     CRITICAL_SECTION *pMutexImpl = (CRITICAL_SECTION *)Mutex;
 102
 103     OSL_ASSERT(Mutex);
 104
 105     LeaveCriticalSection(pMutexImpl);
 106
 107     return sal_True;
 108 }
 109
 110 /*****************************************************************************/
 111 /* osl_getGlobalMutex */
 112 /*****************************************************************************/
 113
 114 /* initialized in dllentry.c */
 115 oslMutex g_Mutex;
 116
 117 oslMutex * SAL_CALL osl_getGlobalMutex(void)
 118 {
 119     return &g_Mutex;
 120 }
 121
 122 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */