xTaskResumeAll

task.

h

char xTaskResumeAll( void );

Resumes real time kernel activity following a call to vTaskSuspendAll (). After a call to vTaskSuspendAll () the kernel will take control of which task is executing at any time.

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 ();
         }
     }
 }
   

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 ();
         }
     }
 }