os_time.c

DSP RTOS源代码

#ifndef  OS_MASTER_FILE
#include "..\EX1\includes.h"
#endif

void OSTimeDly (INT16U ticks)
{
    if (ticks > 0) {                                                      /* 0 means no delay!         */
        OS_ENTER_CRITICAL();
        if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) {  /* Delay current task        */
            OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
        }
        OSTCBCur->OSTCBDly = ticks;                                       /* Load ticks in TCB         */
        OS_EXIT_CRITICAL();
        OSSched();                                                        /* Find next task to run!    */
    }
}

INT8U OSTimeDlyResume (INT8U prio)
{
    OS_TCB *ptcb;


    if (prio >= OS_LOWEST_PRIO) {
        return (OS_PRIO_INVALID);
    }
    OS_ENTER_CRITICAL();
    ptcb = (OS_TCB *)OSTCBPrioTbl[prio];                   /* Make sure that task exist                */
    if (ptcb != (OS_TCB *)0) {
        if (ptcb->OSTCBDly != 0) {                         /* See if task is delayed                   */
            ptcb->OSTCBDly  = 0;                           /* Clear the time delay                     */
            if (!(ptcb->OSTCBStat & OS_STAT_SUSPEND)) {    /* See if task is ready to run              */
                OSRdyGrp               |= ptcb->OSTCBBitY; /* Make task ready to run                   */
                OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
                OS_EXIT_CRITICAL();
                OSSched();                                 /* See if this is new highest priority      */
            } else {
                OS_EXIT_CRITICAL();                        /* Task may be suspended                    */
            }
            return (OS_NO_ERR);
        } else {
            OS_EXIT_CRITICAL();
            return (OS_TIME_NOT_DLY);                      /* Indicate that task was not delayed       */
        }
    } else {
        OS_EXIT_CRITICAL();
        return (OS_TASK_NOT_EXIST);                        /* The task does not exist                  */
    }
}