RAW_U16 raw_semaphore_get(RAW_SEMAPHORE *semaphore_ptr,  RAW_U32 wait_option)
{

 RAW_U16 error_status;

 RAW_SR_ALLOC();

 #if (RAW_SEMA_FUNCTION_CHECK > 0)

 if (semaphore_ptr == 0) {
  
  return RAW_NULL_OBJECT;
 }
 
 if (raw_int_nesting) {

  return RAW_NOT_CALLED_BY_ISR;
 }

 #endif
 
 
 RAW_CRITICAL_ENTER();
 if (semaphore_ptr->count) {                     
  semaphore_ptr->count--;                                      

  RAW_CRITICAL_EXIT();
  
  return RAW_SUCCESS;
 }
 
 /*Cann't get semphore, and return immediately if wait_option is  RAW_NO_WAIT*/
 if (wait_option == RAW_NO_WAIT) {

  RAW_CRITICAL_EXIT();
  return RAW_NO_PEND_WAIT;
 }     
 
 if (raw_sched_lock) {  
  RAW_CRITICAL_EXIT(); 
  return RAW_SCHED_DISABLE;
 }

 raw_pend_object(&semaphore_ptr->common_block_obj, raw_task_active, wait_option);
 RAW_CRITICAL_EXIT();

 raw_sched();
 
 error_status = block_state_post_process(raw_task_active, 0);
 return error_status;

}