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. }