int timer_create()

in FreeRTOS-Plus-POSIX/source/FreeRTOS_POSIX_timer.c [101:149]
34 lines of code
6 McCabe index (conditional complexity)

int timer_create( clockid_t clockid,
                  struct sigevent * evp,
                  timer_t * timerid )
{
    int iStatus = 0;
    timer_internal_t * pxTimer = NULL;

    /* Silence warnings about unused parameters. */
    ( void ) clockid;

    /* POSIX specifies that when evp is NULL, the behavior shall be as is
     * sigev_notify is SIGEV_SIGNAL. SIGEV_SIGNAL is currently not supported. */
    if( ( evp == NULL ) || ( evp->sigev_notify == SIGEV_SIGNAL ) )
    {
        errno = ENOTSUP;
        iStatus = -1;
    }

    /* Allocate memory for a new timer object. */
    if( iStatus == 0 )
    {
        pxTimer = pvPortMalloc( sizeof( timer_internal_t ) );

        if( pxTimer == NULL )
        {
            errno = EAGAIN;
            iStatus = -1;
        }
    }

    if( iStatus == 0 )
    {
        /* Copy the event notification structure and set the current timer period. */
        pxTimer->xTimerEvent = *evp;
        pxTimer->xTimerPeriod = 0;

        /* Create a new FreeRTOS timer. This call will not fail because the
         * memory for it has already been allocated, so the output parameter is
         * also set. */
        *timerid = ( timer_t ) xTimerCreateStatic( posixconfigTIMER_NAME,    /* Timer name. */
                                                   portMAX_DELAY,            /* Initial timer period. Timers are created disarmed. */
                                                   pdFALSE,                  /* Don't auto-reload timer. */
                                                   ( void * ) pxTimer,       /* Timer id. */
                                                   prvTimerCallback,         /* Timer expiration callback. */
                                                   &pxTimer->xTimerBuffer ); /* Pre-allocated memory for timer. */
    }

    return iStatus;
}