/*
 * Copyright (C)2005-2018 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 hl.vm;

typedef ThreadHandle = hl.Abstract<"hl_thread">;

abstract Thread(ThreadHandle) {

	public function sendMessage( msg : Dynamic ) {
		getQueue(this).add(msg);
	}

	public static function readMessage( block = true ) : Dynamic {
		return getQueue(cast current()).pop(block);
	}

	static var queue_mutex : Mutex = null;
	static var threads_queues : Array<{ t : ThreadHandle, q : Deque<Dynamic> }> = null;
	static function getQueue( t : ThreadHandle ) {
		if( queue_mutex == null ) {
			queue_mutex = new Mutex();
			threads_queues = [];
		}
		queue_mutex.acquire();
		var q = null;
		for( tq in threads_queues )
			if( tq.t == t ) {
				q = tq.q;
				break;
			}
		if( q == null ) {
			q = new Deque<Dynamic>();
			threads_queues.push({ t : t, q : q });
		}
		queue_mutex.release();
		return q;
	}

	@:hlNative("std","thread_create")
	public static function create( callb : Void -> Void ) : Thread {
		return null;
	}

	@:hlNative("std","thread_current")
	public static function current() : Thread {
		return null;
	}

}