xTaskResumeAll

Collaboration diagram for xTaskResumeAll:

task. h

BaseType_t xTaskResumeAll( void );

Resumes scheduler activity after it was suspended by a call to vTaskSuspendAll().

xTaskResumeAll() only resumes the scheduler. It does not unsuspend tasks that were previously suspended by a call to vTaskSuspend().

Returns

If resuming the scheduler caused a context switch then pdTRUE is returned, otherwise pdFALSE is returned.

Example usage:

void vTask1( void * pvParameters )
{
  for( ;; )
  {
      // Task code goes here.
 
      // ...
 
      // At some point the task wants to perform a long operation during
      // which it does not want to get swapped out.  It cannot use
      // taskENTER_CRITICAL ()/taskEXIT_CRITICAL () as the length of the
      // operation may cause interrupts to be missed - including the
      // ticks.
 
      // Prevent the real time kernel swapping out the task.
      vTaskSuspendAll ();
 
      // Perform the operation here.  There is no need to use critical
      // sections as we have all the microcontroller processing time.
      // During this time interrupts will still operate and the real
      // time kernel tick count will be maintained.
 
      // ...
 
      // The operation is complete.  Restart the kernel.  We want to force
      // a context switch - but there is no point if resuming the scheduler
      // caused a context switch already.
      if( !xTaskResumeAll () )
      {
           taskYIELD ();
      }
  }
}