internal void ScheduleNextThread()
{
Thread t = readyQueue.Dequeue();
if (t == null)
{
if (collectionRequested)
{
CompilerIntrinsics.Cli(); // TODO: superfluous
NucleusCalls.DebugPrintHex(70, ++gcCount);
NucleusCalls.DebugPrintHex(60, 0);
long t1 = NucleusCalls.Rdtsc();
// No ready threads.
// Make anyone waiting for GC ready:
while (true)
{
t = collectionQueue.Dequeue();
if (t == null)
{
break;
}
readyQueue.Enqueue(t);
}
t = readyQueue.Dequeue();
// Garbage collect, then we're ready to go.
CompilerIntrinsics.Sti();
System.DebugStub.Print("GarbageCollecting. ");
CompilerIntrinsics.Cli();
NucleusCalls.GarbageCollect();
collectionRequested = false;
long t2 = NucleusCalls.Rdtsc();
uint diff = (uint)((t2 - t1) >> 10);
NucleusCalls.DebugPrintHex(60, diff);
}
while (t == null)
{
// TODO: let the CPU sleep here
// TODO: enable interrupts
CompilerIntrinsics.Cli(); // TODO: superfluous
if (!CheckWakeUp())
{
// No threads to run. The system is finished.
CompilerIntrinsics.Cli(); // TODO: superfluous
NucleusCalls.DebugPrintHex(0, 0x76543210);
while (true)
{
}
}
t = readyQueue.Dequeue();
CompilerIntrinsics.Cli(); // TODO: superfluous
}
}
// Go to t.
RunThread(t);
// We're back. Somebody (not necessarily t) yielded to us.
}
