void OSIntExit (void)
{
OS_ENTER_CRITICAL();
if ((--OSIntNesting | OSLockNesting) == 0) { /* Reschedule only if all ISRs completed & not locked */
OSIntExitY = OSUnMapTbl[OSRdyGrp];
OSPrioHighRdy = (INT8U)((OSIntExitY << 3) + OSUnMapTbl[OSRdyTbl][OSIntExitY]]);
if (OSPrioHighRdy != OSPrioCur) { /* No context switch if current task is highest ready */
OSTCBHighRdy = OSTCBPrioTbl[OSPrioHighRdy];
OSCtxSwCtr++; /* Keep track of the number of context switches */
OSIntCtxSw(); /* Perform interrupt level context switch */
}
}
OS_EXIT_CRITICAL();
}
在上述程序里假如 OSIntCtxSw();里进行了任务调度那么
OS_EXIT_CRITICAL(); 这个函数什么时候执行
该中断应该怎么退出？
那位大侠指导、指导。 |
|
楼主
