ucosIII信号量的创建

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楼主

菊江先生|

楼主 | 2019-11-28 20:24 | 只看该作者回帖奖励

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信号, ucosiii, se, TI, ST

void  OSSemCreate (OS_SEM    *p_sem,

               CPU_CHAR *p_name,

               OS_SEM_CTR cnt,

               OS_ERR    *p_err)

{

CPU_SR_ALLOC();

#ifdef OS_SAFETY_CRITICAL

if (p_err == (OS_ERR *)0) {

      OS_SAFETY_CRITICAL_EXCEPTION();

      return;

}

#endif

#ifdef OS_SAFETY_CRITICAL_IEC61508

if (OSSafetyCriticalStartFlag == DEF_TRUE) {

      *p_err = OS_ERR_ILLEGAL_CREATE_RUN_TIME;

      return;

}

#endif

#if OS_CFG_CALLED_FROM_ISR_CHK_EN > 0u

if (OSIntNestingCtr > (OS_NESTING_CTR)0) {             /* Not allowed to be called from an ISR                */

      *p_err = OS_ERR_CREATE_ISR;

      return;

}

#endif

#if OS_CFG_ARG_CHK_EN > 0u

if (p_sem == (OS_SEM *)0) {                            /* Validate 'p_sem'                                     */

      *p_err = OS_ERR_OBJ_PTR_NULL;

      return;

}

#endif

CPU_CRITICAL_ENTER();

p_sem->Type = OS_OBJ_TYPE_SEM;                      /* Mark the data structure as a semaphore                */

p_sem->Ctr    = cnt;                                  /* Set semaphore value                                  */

p_sem->TS    = (CPU_TS)0;

p_sem->NamePtr = p_name;                               /* Save the name of the semaphore                      */

OS_PendListInit(&p_sem->PendList);                   /* Initialize the waiting list                         */

#if OS_CFG_DBG_EN > 0u

OS_SemDbgListAdd(p_sem);

#endif

OSSemQty++;

CPU_CRITICAL_EXIT();

*p_err = OS_ERR_NONE;

}

ucosIII中信号量的创建函数，它的参数该怎样填？

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