71 lines
3 KiB
C++
71 lines
3 KiB
C++
/*************************************************************************/
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/* mutex.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef MUTEX_H
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#define MUTEX_H
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#include "error_list.h"
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/**
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* @class Mutex
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* @author Juan Linietsky
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* Portable Mutex (thread-safe locking) implementation.
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* Mutexes are always recursive ( they don't self-lock in a single thread ).
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* Mutexes can be used with a Lockp object like this, to avoid having to worry about unlocking:
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* Lockp( mutex );
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*/
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class Mutex {
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protected:
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static Mutex* (*create_func)(bool);
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public:
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virtual void lock()=0; ///< Lock the mutex, block if locked by someone else
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virtual void unlock()=0; ///< Unlock the mutex, let other threads continue
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virtual Error try_lock()=0; ///< Attempt to lock the mutex, OK on success, ERROR means it can't lock.
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static Mutex * create(bool p_recursive=true); ///< Create a mutex
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virtual ~Mutex();
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};
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class MutexLock {
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Mutex *mutex;
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public:
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MutexLock(Mutex* p_mutex) { mutex=p_mutex; if (mutex) mutex->lock(); }
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~MutexLock() { if (mutex) mutex->unlock(); }
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};
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#endif
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