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/*
* File : Mutex.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2016, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2016/10/1 Bernard The first version
*/
#pragma once
#include <stdint.h>
#include <rtthread.h>
namespace rtthread {
/** The Mutex class is used to synchronise the execution of threads.
This is for example used to protect access to a shared resource.
*/
class Mutex {
public:
/** Create and Initialize a Mutex object */
Mutex(const char* name = "mutex");
~Mutex();
/** Wait until a Mutex becomes available.
@param millisec timeout value or 0 in case of no time-out. (default: WaitForever)
@return true if the mutex was acquired, false otherwise.
*/
bool lock(int32_t millisec = -1);
/** Try to lock the mutex, and return immediately
@return true if the mutex was acquired, false otherwise.
*/
bool trylock();
/** Unlock the mutex that has previously been locked by the same thread
*/
void unlock();
private:
struct rt_mutex mID;
};
}
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