sal/osl/os2/conditn.c

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  27
  28 #include "system.h"
  29
  30 #include <osl/conditn.h>
  31 #include <osl/diagnose.h>
  32 #include <osl/time.h>
  33
  34
  35
  36 /*
  37     under WIN32, we use the void* oslCondition
  38     as a WIN32 HANDLE (which is also a 32-bit value)
  39 */
  40
  41 /*****************************************************************************/
  42 /* osl_createCondition */
  43 /*****************************************************************************/
  44 oslCondition SAL_CALL osl_createCondition()
  45 {
  46     HEV hevCondition;
  47     APIRET rc;
  48
  49     rc = DosCreateEventSem( NULL,       /* unnamed semaphore */
  50                             &hevCondition,  /* pointer to variable */
  51                                                    /* for the sem-handle */
  52                             DC_SEM_SHARED,  /* shared semaphore */
  53                             FALSE );         /* initial state is posted */
  54
  55     if( rc == NO_ERROR )
  56         return (oslCondition)hevCondition;
  57     else
  58         return NULL;
  59 }
  60
  61 /*****************************************************************************/
  62 /* osl_destroyCondition */
  63 /*****************************************************************************/
  64 void SAL_CALL osl_destroyCondition(oslCondition Condition)
  65 {
  66     if( Condition )
  67         DosCloseEventSem( (HEV) Condition );
  68 }
  69
  70 /*****************************************************************************/
  71 /* osl_setCondition */
  72 /*****************************************************************************/
  73 sal_Bool SAL_CALL osl_setCondition(oslCondition Condition)
  74 {
  75     OSL_ASSERT(Condition);
  76
  77     return DosPostEventSem((HEV)Condition) == NO_ERROR;
  78 }
  79
  80 /*****************************************************************************/
  81 /* osl_resetCondition */
  82 /*****************************************************************************/
  83 sal_Bool SAL_CALL osl_resetCondition(oslCondition Condition)
  84 {
  85     ULONG ulPostCount;
  86
  87     OSL_ASSERT(Condition);
  88
  89     return DosResetEventSem((HEV)Condition, &ulPostCount) == NO_ERROR;
  90 }
  91
  92 /*****************************************************************************/
  93 /* osl_waitCondition */
  94 /*****************************************************************************/
  95 oslConditionResult SAL_CALL osl_waitCondition(oslCondition Condition, const TimeValue * pTimeout )
  96 {
  97     long nTimeout;
  98     APIRET rc;
  99     OSL_ASSERT(Condition);
 100
 101     if( pTimeout )
 102         nTimeout = pTimeout->Seconds * 1000 + pTimeout->Nanosec / 1000000;
 103     else
 104         nTimeout = SEM_INDEFINITE_WAIT;
 105
 106     rc = DosWaitEventSem((HEV)Condition, nTimeout );
 107     if( rc == ERROR_TIMEOUT )
 108         return osl_cond_result_timeout;
 109     if( rc != NO_ERROR )
 110         return osl_cond_result_error;
 111
 112     return osl_cond_result_ok;
 113 }
 114
 115 /*****************************************************************************/
 116 /* osl_checkCondition */
 117 /*****************************************************************************/
 118 sal_Bool SAL_CALL osl_checkCondition(oslCondition Condition)
 119 {
 120     OSL_ASSERT(Condition);
 121
 122     return( DosWaitEventSem((HEV)Condition, SEM_IMMEDIATE_RETURN) == NO_ERROR);
 123 }
 124