godot/core/os/mutex.h
Rémi Verschelde 49646383f1
Update copyright statements to 2021
Happy new year to the wonderful Godot community!

2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.

We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)

Here's to a great year 2021 for all Godot users 🎆

(cherry picked from commit b5334d14f7)
2021-01-13 16:17:06 +01:00

74 lines
3.1 KiB
C++

/*************************************************************************/
/* mutex.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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. */
/*************************************************************************/
#ifndef MUTEX_H
#define MUTEX_H
#include "core/error_list.h"
/**
* @class Mutex
* @author Juan Linietsky
* Portable Mutex (thread-safe locking) implementation.
* Mutexes are always recursive ( they don't self-lock in a single thread ).
* Mutexes can be used with a Lockp object like this, to avoid having to worry about unlocking:
* Lockp( mutex );
*/
class Mutex {
protected:
static Mutex *(*create_func)(bool);
public:
virtual void lock() = 0; ///< Lock the mutex, block if locked by someone else
virtual void unlock() = 0; ///< Unlock the mutex, let other threads continue
virtual Error try_lock() = 0; ///< Attempt to lock the mutex, OK on success, ERROR means it can't lock.
static Mutex *create(bool p_recursive = true); ///< Create a mutex
virtual ~Mutex();
};
class MutexLock {
Mutex *mutex;
public:
MutexLock(Mutex *p_mutex) {
mutex = p_mutex;
if (mutex) mutex->lock();
}
~MutexLock() {
if (mutex) mutex->unlock();
}
};
#endif