void main() {
usb_init();
usb_set_idle_handler(idler);
while (1) {
idler();
usb_poll();
}
}
TInt WaitForIdle()
{// Wait for chunk to be destroyed and then for the chunk cleanup dfc to run.
for (TUint i = 0; i < 2; i++)
{
NFastSemaphore s(0);
TDfc idler(&signal_sem, &s, Kern::SvMsgQue(), 0); // supervisor thread, priority 0, so will run after destroyed DFC
NTimer timer(&signal_sem, &s);
idler.QueueOnIdle();
timer.OneShot(NKern::TimerTicks(5000), ETrue); // runs in DFCThread1
NKern::FSWait(&s); // wait for either idle DFC or timer
TBool timeout = idler.Cancel(); // cancel idler, return TRUE if it hadn't run
TBool tmc = timer.Cancel(); // cancel timer, return TRUE if it hadn't expired
if (!timeout && !tmc)
NKern::FSWait(&s); // both the DFC and the timer went off - wait for the second one
if (timeout)
return KErrTimedOut;
}
return KErrNone;
}