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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* Anytun 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 anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#include <boost/thread.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/shared_mutex.hpp>
#include <boost/thread/condition.hpp>
#include "datatypes.h"
#ifndef __THREADUTILS__
#define __THREADUTILS__
typedef boost::mutex::scoped_lock Lock;
typedef boost::mutex Mutex;
typedef boost::shared_mutex SharedMutex;
typedef boost::shared_lock<SharedMutex> ReadersLock;
typedef boost::unique_lock<SharedMutex> WritersLock;
class Semaphore
{
public:
Semaphore(unsigned int initVal=0)
:count_(initVal){};
void up()
{
boost::mutex::scoped_lock lock(mutex_);
count_++;
lock.unlock();
cond_.notify_one();
}
void down()
{
boost::mutex::scoped_lock lock(mutex_);
while (count_ <= 0)
cond_.wait(lock);
count_--;
}
private:
boost::mutex mutex_;
boost::condition cond_;
int16_t count_;
};
#endif
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