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/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib 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.
*
* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef WSREP_MUTEX_HPP
#define WSREP_MUTEX_HPP
#include "compiler.hpp"
#include "exception.hpp"
#include <pthread.h>
namespace wsrep
{
/**
* Mutex interface.
*/
class mutex
{
public:
mutex() { }
virtual ~mutex() { }
virtual void lock() = 0;
virtual void unlock() = 0;
/* Return native handle */
virtual void* native() = 0;
private:
mutex(const mutex& other);
mutex& operator=(const mutex& other);
};
// Default pthread implementation
class default_mutex : public wsrep::mutex
{
public:
default_mutex()
: wsrep::mutex(),
mutex_()
{
if (pthread_mutex_init(&mutex_, 0))
{
throw wsrep::runtime_error("mutex init failed");
}
}
~default_mutex() WSREP_OVERRIDE
{
if (pthread_mutex_destroy(&mutex_)) ::abort();
}
void lock() WSREP_OVERRIDE
{
if (pthread_mutex_lock(&mutex_))
{
throw wsrep::runtime_error("mutex lock failed");
}
}
void unlock() WSREP_OVERRIDE
{
if (pthread_mutex_unlock(&mutex_))
{
throw wsrep::runtime_error("mutex unlock failed");
}
}
void* native() WSREP_OVERRIDE
{
return &mutex_;
}
private:
pthread_mutex_t mutex_;
};
}
#endif // WSREP_MUTEX_HPP
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