#define DEBUGGING_LEVEL 0 // 1 = low; 2 = high; 3 = extreme
#define DEBUGLOG IOLog
#import <IOKit/firewire/IOFWWorkLoop.h>
#import <IOKit/IOWorkLoop.h>
OSDefineMetaClassAndStructors( IOFWWorkLoop, IOWorkLoop )
IOFWWorkLoop * IOFWWorkLoop::workLoop()
{
IOFWWorkLoop *loop;
loop = new IOFWWorkLoop;
if(!loop)
return loop;
if(!loop->init()) {
loop->release();
loop = NULL;
}
return loop;
}
void IOFWWorkLoop::closeGate()
{
IOWorkLoop::closeGate();
if(fSleepToken) {
IOReturn res;
do {
res = sleepGate(fSleepToken, THREAD_ABORTSAFE);
if(res == kIOReturnSuccess)
break;
IOLog("sleepGate returned 0x%x\n", res);
} while (true);
}
}
bool IOFWWorkLoop::tryCloseGate()
{
bool ret;
ret = IOWorkLoop::tryCloseGate();
if(ret && fSleepToken) {
openGate();
ret = false;
}
return ret;
}
IOReturn IOFWWorkLoop::sleep(void *token)
{
if(fSleepToken) {
DEBUGLOG("IOFWWorkLoop::sleep: Already asleep: %p\n", token);
return kIOReturnError;
}
fSleepToken = token;
openGate();
return kIOReturnSuccess;
}
IOReturn IOFWWorkLoop::wake(void *token)
{
if(fSleepToken != token) {
DEBUGLOG("IOFWWorkLoop::wake: wrong token: %p<->%p\n", token, fSleepToken);
return kIOReturnError;
}
IORecursiveLockLock(gateLock);
fSleepToken = NULL;
wakeupGate(token, false);
return kIOReturnSuccess;
}