HaxeFoundation.haxe/std/hl/_std/sys/thread/Mutex.hx

/*
 * Copyright (C)2005-2019 Haxe Foundation
 *
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 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
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 * 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,
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 * DEALINGS IN THE SOFTWARE.
 */

package sys.thread;

#if doc_gen
@:coreApi
extern class Mutex {
	public function new():Void;
	public function acquire():Void;
	public function tryAcquire():Bool;
	public function release():Void;
}
#else

/**
	Creates a mutex, which can be used to acquire a temporary lock
	to access some ressource. The main difference with a lock is
	that a mutex must always be released by the owner thread.
**/
abstract Mutex(hl.Abstract<"hl_mutex">) {
	/**
		Creates a mutex.
	**/
	public function new() {
		this = alloc(true);
	}

	/**
		The current thread acquire the mutex or wait if not available.
		The same thread can acquire several times the same mutex but
		must release it as many times it has been acquired.
	**/
	@:hlNative("std", "mutex_acquire") public function acquire() {}

	/**
		Try to acquire the mutex, returns true if acquire or false
		if it's already locked by another thread.
	**/
	@:hlNative("std", "mutex_try_acquire") public function tryAcquire():Bool {
		return false;
	}

	/**
		Release a mutex that has been acquired by the current thread.
		The behavior is undefined if the current thread does not own
		the mutex.
	**/
	@:hlNative("std", "mutex_release") public function release() {}

	@:hlNative("std", "mutex_alloc") public static function alloc(b:Bool) {
		return null;
	}
}
#end