/*****************************************************************************
*
* Description:
* This function takes a counting semaphore, i.e. decreasing the semaphore
* counting. If the semaphore counter is zero the function will block until
* another process or an ISR gives the semaphore or a timeout occurs.
*
* Params:
* [in] pSem - A pointer to an initialized semaphore structure.
* [in] timeout - After timeout ticks the operation will timeout. A
* timeout of zero means no timeout at all.
* [out] pError - The return status of the function.
*
* Returns:
* TRUE if semaphore was taken and FALSE if timeout or error.
*
* Error codes:
* OS_OK - The function completed successfully.
* OS_ERROR_ISR - The function was called from an interrupt service
* routine.
* OS_ERROR_NULL - A NULL pointer was supplied to the function where it was
* not allowed.
*
****************************************************************************/
tBool
osSemTake(tCntSem* pSem,
tU32 timeout,
tU8* pError)
{
tU8 ret;
volatile tSR localSR; /* declare temporary local space for status word */
*pError = OS_OK;
if(pSem == NULL)
{
*pError = OS_ERROR_NULL;
return FALSE;
}
m_os_dis_int();
if(isrNesting > 0)
{
m_os_ena_int();
*pError = OS_ERROR_ISR;
return FALSE;
}
if(pSem->cnt > 0)
{
pSem->cnt--;
}
else
{
eventWait((tOSEvent*)pSem, timeout);
m_os_ena_int();
schedule();
m_os_dis_int();
ret = eventWaitReturn((tOSEvent*)pSem);
if(ret == OS_ERROR_TIMEOUT){
m_os_ena_int();
return FALSE;
}
}
m_os_ena_int();
return TRUE;
}
int mmapLogWaitEvent(int timeout)
{
return eventWait(g_mmap_log.event, timeout);
}
