death.h File Reference

Go to the source code of this file.

Functions
void	vCreateSuicidalTasks (unsigned portBASE_TYPE uxPriority)
portBASE_TYPE	xIsCreateTaskStillRunning (void)

---

Function Documentation

void vCreateSuicidalTasks

(

unsigned portBASE_TYPE

uxPriority

)

Definition at line 125 of file death.c.

References deathSTACK_SIZE, portBASE_TYPE, pvPortMalloc(), uxTaskGetNumberOfTasks(), uxTasksRunningAtStart, and xTaskCreate.

Referenced by vErrorChecks().

{
unsigned portBASE_TYPE *puxPriority;

    /* Create the Creator tasks - passing in as a parameter the priority at which
    the suicidal tasks should be created. */
    puxPriority = ( unsigned portBASE_TYPE * ) pvPortMalloc( sizeof( unsigned portBASE_TYPE ) );
    *puxPriority = uxPriority;

    xTaskCreate( vCreateTasks, ( signed char * ) "CREATOR", deathSTACK_SIZE, ( void * ) puxPriority, uxPriority, NULL );

    /* Record the number of tasks that are running now so we know if any of the
    suicidal tasks have failed to be killed. */
    uxTasksRunningAtStart = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks();
    
    /* FreeRTOS.org versions before V3.0 started the idle-task as the very
    first task. The idle task was then already included in uxTasksRunningAtStart.
    From FreeRTOS V3.0 on, the idle task is started when the scheduler is
    started. Therefore the idle task is not yet accounted for. We correct
    this by increasing uxTasksRunningAtStart by 1. */
    uxTasksRunningAtStart++;
}

portBASE_TYPE xIsCreateTaskStillRunning

(

void

)

Definition at line 215 of file death.c.

References pdFALSE, pdTRUE, portBASE_TYPE, usCreationCount, uxMaxNumberOfExtraTasksRunning, uxTaskGetNumberOfTasks(), and uxTasksRunningAtStart.

Referenced by prvCheckOtherTasksAreStillRunning().

{
static unsigned short usLastCreationCount = 0xfff;
portBASE_TYPE xReturn = pdTRUE;
static unsigned portBASE_TYPE uxTasksRunningNow;

    if( usLastCreationCount == usCreationCount )
    {
        xReturn = pdFALSE;
    }
    else
    {
        usLastCreationCount = usCreationCount;
    }
    
    uxTasksRunningNow = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks();

    if( uxTasksRunningNow < uxTasksRunningAtStart )
    {
        xReturn = pdFALSE;
    }
    else if( ( uxTasksRunningNow - uxTasksRunningAtStart ) > uxMaxNumberOfExtraTasksRunning )
    {
        xReturn = pdFALSE;
    }
    else
    {
        /* Everything is okay. */
    }

    return xReturn;
}