Function vTaskSuspendAll

tasks.c:2847–2886

/*----------------------------------------------------------*/

void vTaskSuspendAll( void )
{
    UBaseType_t ulState;

    /* This must only be called from within a task */
    portASSERT_IF_IN_ISR();

    if( xSchedulerRunning != pdFALSE )
    {
        /* writes to uxSchedulerSuspended must be protected by both the task AND ISR locks.
         * We must disable interrupts before we grab the locks in the event that this task is
         * interrupted and switches context before incrementing uxSchedulerSuspended.
         * It is safe to re-enable interrupts after releasing the ISR lock and incrementing
         * uxSchedulerSuspended since that will prevent context switches. */
        ulState = portDISABLE_INTERRUPTS();

        /* portSOFRWARE_BARRIER() is only implemented for emulated/simulated ports that
         * do not otherwise exhibit real time behaviour. */
        portSOFTWARE_BARRIER();

        portGET_TASK_LOCK();
        portGET_ISR_LOCK();

        /* The scheduler is suspended if uxSchedulerSuspended is non-zero.  An increment
         * is used to allow calls to vTaskSuspendAll() to nest. */
        ++uxSchedulerSuspended;
        portRELEASE_ISR_LOCK();

        if( ( uxSchedulerSuspended == 1U ) && ( pxCurrentTCB->uxCriticalNesting == 0U ) )
        {
            prvCheckForRunStateChange();
        }

        portRESTORE_INTERRUPTS( ulState );
    }
    else
    {
        mtCOVERAGE_TEST_MARKER();
    }
}
/*----------------------------------------------------------*/

#if ( configUSE_TICKLESS_IDLE != 0 )