Example #1
0
/* virtual */ bool IOWorkLoop::runEventSources()
{
    bool res = false;
    bool traceWL = (gIOKitTrace & kIOTraceWorkLoops) ? true : false;
    bool traceES = (gIOKitTrace & kIOTraceEventSources) ? true : false;
    
    closeGate();
    if (ISSETP(&fFlags, kLoopTerminate))
		goto abort;
	
    if (traceWL)
    	IOTimeStampStartConstant(IODBG_WORKLOOP(IOWL_WORK), (uintptr_t) this);
	
    bool more;
    do {
		CLRP(&fFlags, kLoopRestart);
		more = false;
		IOInterruptState is = IOSimpleLockLockDisableInterrupt(workToDoLock);
		workToDo = false;
		IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
		/* NOTE: only loop over event sources in eventChain. Bypass "passive" event sources for performance */
		for (IOEventSource *evnt = eventChain; evnt; evnt = evnt->getNext()) {
			
			if (traceES)
				IOTimeStampStartConstant(IODBG_WORKLOOP(IOWL_CLIENT), (uintptr_t) this, (uintptr_t) evnt);
			
			more |= evnt->checkForWork();
			
			if (traceES)
				IOTimeStampEndConstant(IODBG_WORKLOOP(IOWL_CLIENT), (uintptr_t) this, (uintptr_t) evnt);
			
			if (ISSETP(&fFlags, kLoopTerminate))
				goto abort;
			else if (fFlags & kLoopRestart) {
				more = true;
				break;
			}
		}
    } while (more);
	
    res = true;
	
    if (traceWL)
    	IOTimeStampEndConstant(IODBG_WORKLOOP(IOWL_WORK), (uintptr_t) this);
	
abort:
    openGate();
    return res;
}
Example #2
0
/* virtual */ bool IOWorkLoop::runEventSources()
{
    bool res = false;
    closeGate();
    if (ISSETP(&fFlags, kLoopTerminate))
	goto abort;

    IOTimeWorkS();
    bool more;
    do {
	CLRP(&fFlags, kLoopRestart);
	more = false;
	IOInterruptState is = IOSimpleLockLockDisableInterrupt(workToDoLock);
	workToDo = false;
	IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
	for (IOEventSource *evnt = eventChain; evnt; evnt = evnt->getNext()) {

	    IOTimeClientS();
	    more |= evnt->checkForWork();
	    IOTimeClientE();

	    if (ISSETP(&fFlags, kLoopTerminate))
		goto abort;
	    else if (fFlags & kLoopRestart) {
		more = true;
		break;
	    }
	}
    } while (more);

    res = true;
    IOTimeWorkE();

abort:
    openGate();
    return res;
}