attempt to make input handling a bit more power efficient on no activity

platform.d

@@ -466,13 +466,22 @@ Wake(SysThread* thread)
 	PThreadCondSignal(&thread.cond);
 }
 
+void
+Yield()
+{
+	version(linux)
+	{
+		import core.sys.posix.sched;
+		sched_yield();
+	}
+}
+
 void
 Kill()
 {
 	PThreadExit(null);
 }
 
-
 void
 ResetInputs(Inputs* inputs)
 {
@@ -1097,6 +1106,7 @@ HandleEvents(void* window_ptr)
 
 	bool ignore_mouse_events = false;
 	
+	u64 no_ev_count;
 	for(;;)
 	{
 		if(w.close)
@@ -1289,12 +1299,20 @@ HandleEvents(void* window_ptr)
 					xcb_send_event(w.conn, false, req.requestor, XCB_EVENT_MASK_PROPERTY_CHANGE, cast(char*)&notify);
 					xcb_flush(w.conn);
 				} break;
-			default:
-				break;
+			default: break;
 			}
 
 			ReturnInputs(w);
 		}
+		else
+		{
+			no_ev_count += 1;
+			if(no_ev_count >= 5)
+			{
+				no_ev_count = 0;
+				Yield();
+			}
+		}
 	} 
 }
 

util.d

@@ -23,6 +23,16 @@ Int3()
 	}
 }
 
+pragma(inline) void
+Pause()
+{
+	asm
+	{
+		rep;
+		nop;
+	}
+}
+
 pragma(inline) bool
 CondIncr(i64 step, T)(bool cond, T* val)
 {