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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 sys.thread;
import python.lib.threading.Thread as NativeThread;
import python.lib.Threading;
import haxe.ds.ObjectMap;
private typedef ThreadImpl = HxThread;
abstract Thread(ThreadImpl) from ThreadImpl {
public var events(get,never):EventLoop;
public static inline function current():Thread {
return HxThread.current();
}
public static inline function create(job:Void->Void):Thread {
return HxThread.create(job, false);
}
public static inline function runWithEventLoop(job:()->Void):Void {
HxThread.runWithEventLoop(job);
}
public static inline function createWithEventLoop(job:()->Void):Thread {
return HxThread.create(job, true);
}
public static inline function readMessage(block:Bool):Dynamic {
return HxThread.readMessage(block);
}
public inline function sendMessage(msg:Dynamic):Void {
this.sendMessage(msg);
}
function get_events():EventLoop {
if(this.events == null)
throw new NoEventLoopException();
return this.events;
}
@:keep
static public function processEvents() {
HxThread.current().events.loop();
}
}
private class HxThread {
public var events(default,null):Null<EventLoop>;
final nativeThread:NativeThread;
final messages = new Deque<Dynamic>();
static var threads:ObjectMap<NativeThread, HxThread>;
static var threadsMutex:Mutex;
static var mainThread:HxThread;
static function __init__() {
threads = new ObjectMap();
threadsMutex = new Mutex();
mainThread = new HxThread(Threading.current_thread());
mainThread.events = new EventLoop();
}
private function new(t:NativeThread) {
nativeThread = t;
}
public function sendMessage(msg:Dynamic):Void {
messages.add(msg);
}
public static function current():HxThread {
threadsMutex.acquire();
var ct = Threading.current_thread();
if (ct == Threading.main_thread()) {
threadsMutex.release();
return mainThread;
}
// If the current thread was not created via the haxe API, it can still be wrapped
if (!threads.exists(ct)) {
threads.set(ct, new HxThread(ct));
}
var t = threads.get(ct);
threadsMutex.release();
return t;
}
public static function create(callb:Void->Void, withEventLoop:Bool):HxThread {
var nt:NativeThread = null;
var t:HxThread = null;
// Wrap the callback so it will clear the thread reference once the thread is finished
var wrappedCallB = () -> {
try {
callb();
if(withEventLoop)
t.events.loop();
} catch(e) {
dropThread(nt);
throw e;
}
dropThread(nt);
}
nt = new NativeThread({target:wrappedCallB});
t = new HxThread(nt);
if(withEventLoop)
t.events = new EventLoop();
threadsMutex.acquire();
threads.set(nt, t);
threadsMutex.release();
nt.start();
return t;
}
public static function runWithEventLoop(job:()->Void):Void {
var thread = current();
if(thread.events == null) {
thread.events = new EventLoop();
try {
job();
thread.events.loop();
thread.events = null;
} catch(e) {
thread.events = null;
throw e;
}
} else {
job();
}
}
static inline function dropThread(nt:NativeThread) {
threadsMutex.acquire();
threads.remove(nt);
threadsMutex.release();
}
public static function readMessage(block:Bool):Dynamic {
return current().messages.pop(block);
}
}
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