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Kha/Tools/linux_x64/std/haxe/Timer.hx

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+/*
+ * Copyright (C)2005-2019 Haxe Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+package haxe;
+
+#if (target.threaded && !cppia)
+import sys.thread.Thread;
+import sys.thread.EventLoop;
+#end
+
+/**
+	The `Timer` class allows you to create asynchronous timers on platforms that
+	support events.
+
+	The intended usage is to create an instance of the `Timer` class with a given
+	interval, set its `run()` method to a custom function to be invoked and
+	eventually call `stop()` to stop the `Timer`.
+
+	Note that a running `Timer` may or may not prevent the program to exit
+	automatically when `main()` returns.
+
+	It is also possible to extend this class and override its `run()` method in
+	the child class.
+**/
+class Timer {
+	#if (flash || js)
+	private var id:Null<Int>;
+	#elseif (target.threaded && !cppia)
+	var thread:Thread;
+	var eventHandler:EventHandler;
+	#else
+	private var event:MainLoop.MainEvent;
+	#end
+
+	/**
+		Creates a new timer that will run every `time_ms` milliseconds.
+
+		After creating the Timer instance, it calls `this.run` repeatedly,
+		with delays of `time_ms` milliseconds, until `this.stop` is called.
+
+		The first invocation occurs after `time_ms` milliseconds, not
+		immediately.
+
+		The accuracy of this may be platform-dependent.
+	**/
+	public function new(time_ms:Int) {
+		#if flash
+		var me = this;
+		id = untyped __global__["flash.utils.setInterval"](function() {
+			me.run();
+		}, time_ms);
+		#elseif js
+		var me = this;
+		id = untyped setInterval(function() me.run(), time_ms);
+		#elseif (target.threaded && !cppia)
+		thread = Thread.current();
+		eventHandler = thread.events.repeat(() -> this.run(), time_ms);
+		#else
+		var dt = time_ms / 1000;
+		event = MainLoop.add(function() {
+			@:privateAccess event.nextRun += dt;
+			run();
+		});
+		event.delay(dt);
+		#end
+	}
+
+	/**
+		Stops `this` Timer.
+
+		After calling this method, no additional invocations of `this.run`
+		will occur.
+
+		It is not possible to restart `this` Timer once stopped.
+	**/
+	public function stop() {
+		#if (flash || js)
+		if (id == null)
+			return;
+		#if flash
+		untyped __global__["flash.utils.clearInterval"](id);
+		#elseif js
+		untyped clearInterval(id);
+		#end
+		id = null;
+		#elseif (target.threaded && !cppia)
+		thread.events.cancel(eventHandler);
+		#else
+		if (event != null) {
+			event.stop();
+			event = null;
+		}
+		#end
+	}
+
+	/**
+		This method is invoked repeatedly on `this` Timer.
+
+		It can be overridden in a subclass, or rebound directly to a custom
+		function:
+
+		```haxe
+		var timer = new haxe.Timer(1000); // 1000ms delay
+		timer.run = function() { ... }
+		```
+
+		Once bound, it can still be rebound to different functions until `this`
+		Timer is stopped through a call to `this.stop`.
+	**/
+	public dynamic function run() {}
+
+	/**
+		Invokes `f` after `time_ms` milliseconds.
+
+		This is a convenience function for creating a new Timer instance with
+		`time_ms` as argument, binding its `run()` method to `f` and then stopping
+		`this` Timer upon the first invocation.
+
+		If `f` is `null`, the result is unspecified.
+	**/
+	public static function delay(f:Void->Void, time_ms:Int) {
+		var t = new haxe.Timer(time_ms);
+		t.run = function() {
+			t.stop();
+			f();
+		};
+		return t;
+	}
+
+	/**
+		Measures the time it takes to execute `f`, in seconds with fractions.
+
+		This is a convenience function for calculating the difference between
+		`Timer.stamp()` before and after the invocation of `f`.
+
+		The difference is passed as argument to `Log.trace()`, with `"s"` appended
+		to denote the unit. The optional `pos` argument is passed through.
+
+		If `f` is `null`, the result is unspecified.
+	**/
+	public static function measure<T>(f:Void->T, ?pos:PosInfos):T {
+		var t0 = stamp();
+		var r = f();
+		Log.trace((stamp() - t0) + "s", pos);
+		return r;
+	}
+
+	/**
+		Returns a timestamp, in seconds with fractions.
+
+		The value itself might differ depending on platforms, only differences
+		between two values make sense.
+	**/
+	public static inline function stamp():Float {
+		#if flash
+		return flash.Lib.getTimer() / 1000;
+		#elseif js
+		#if nodejs
+		var hrtime = js.Syntax.code('process.hrtime()'); // [seconds, remaining nanoseconds]
+		return hrtime[0] + hrtime[1] / 1e9;
+		#else
+		return @:privateAccess HxOverrides.now() / 1000;
+		#end
+		#elseif cpp
+		return untyped __global__.__time_stamp();
+		#elseif python
+		return Sys.cpuTime();
+		#elseif sys
+		return Sys.time();
+		#else
+		return 0;
+		#end
+	}
+}