sqInt ioRelinquishProcessorForMicroseconds(sqInt microSeconds) {
//API Documented
/* This operation is platform dependent. */
#pragma unused(microSeconds)
sqInt realTimeToWait,now,next;
extern sqInt getNextWakeupTick(void); //This is a VM Callback
extern sqInt setInterruptCheckCounter(sqInt value); //This is a VM Callback
setInterruptCheckCounter(0);
now = ioMSecs();
next = getNextWakeupTick();
/*BUG??? what if clock wraps? */
if (next <= now)
if (next == 0)
realTimeToWait = 16;
else {
return 0;
}
else
realTimeToWait = next - now;
aioSleep((int) realTimeToWait*1000);
return 0;
}
static void recordKeystroke(int keyCode) /* DEPRECATED */
{
if (inputEventSemaIndex == 0)
{
int keystate= keyCode | (modifierState << 8);
# ifdef DEBUG_EVENTS
printf("RECORD keystroke");
printModifiers(modifierState);
printKey(keyCode);
printf(" = %d 0x%x\n", keystate, keystate);
# endif
if (keystate == getInterruptKeycode())
{
setInterruptPending(true);
setInterruptCheckCounter(0);
}
else
{
keyBuf[keyBufPut]= keystate;
keyBufPut= (keyBufPut + 1) % KEYBUF_SIZE;
if (keyBufGet == keyBufPut)
{
/* buffer overflow; drop the last character */
keyBufGet= (keyBufGet + 1) % KEYBUF_SIZE;
keyBufOverflows++;
}
}
}
}
sqInt ioRelinquishProcessorForMicroseconds(sqInt microSeconds) {
yield();
int now;
now = ioMSecs();
if (now - lastInterruptCheck > (1000/25)) { /* avoid thrashing intr checks from 1ms loop in idle proc */
setInterruptCheckCounter(-1000); /* ensure timely poll for semaphore activity */
lastInterruptCheck = now;
}
return 0;
}
sqInt ioRelinquishProcessorForMicroseconds(sqInt us)
{
int now;
dpy->ioRelinquishProcessorForMicroseconds(us);
now= ioLowResMSecs();
if (now - lastInterruptCheck > (1000/25)) /* avoid thrashing intr checks from 1ms loop in idle proc */
{
setInterruptCheckCounter(-1000); /* ensure timely poll for semaphore activity */
lastInterruptCheck= now;
}
return 0;
}
sqInt ioRelinquishProcessorForMicroseconds(sqInt us)
{
int nwt= getNextWakeupTick();
int ms= 0;
if (nwt)
{
int now= (ioMSecs() & 0x1fffffff);
ms= ((nwt <= now) ? (1000/60) : nwt - now);
}
dpy->ioRelinquishProcessorForMicroseconds(ms*1000);
setInterruptCheckCounter(0);
return 0;
}