Scheduler now uses btime, and other improvements

code/__defines/process_scheduler.dm

@@ -0,0 +1,20 @@
+// Process status defines
+#define PROCESS_STATUS_IDLE 1
+#define PROCESS_STATUS_QUEUED 2
+#define PROCESS_STATUS_RUNNING 3
+#define PROCESS_STATUS_MAYBE_HUNG 4
+#define PROCESS_STATUS_PROBABLY_HUNG 5
+#define PROCESS_STATUS_HUNG 6
+
+// Process time thresholds
+#define PROCESS_DEFAULT_HANG_WARNING_TIME 	300 // 30 seconds
+#define PROCESS_DEFAULT_HANG_ALERT_TIME 	600 // 60 seconds
+#define PROCESS_DEFAULT_HANG_RESTART_TIME 	900 // 90 seconds
+#define PROCESS_DEFAULT_SCHEDULE_INTERVAL 	50  // 50 ticks
+#define PROCESS_DEFAULT_SLEEP_INTERVAL		8	// 2 ticks
+#define PROCESS_DEFAULT_CPU_THRESHOLD		90  // 90%
+
+// SCHECK macros
+// This references src directly to work around a weird bug with try/catch
+#define SCHECK_EVERY(this_many_calls) if(++src.calls_since_last_scheck >= this_many_calls) sleepCheck()
+#define SCHECK SCHECK_EVERY(50)