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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef ZT_BLOCKINGQUEUE_HPP
#define ZT_BLOCKINGQUEUE_HPP
#include <queue>
#include <mutex>
#include <condition_variable>
namespace ZeroTier {
/**
* Simple C++11 thread-safe queue
*
* Do not use in node/ since we have not gone C++11 there yet.
*/
template <class T>
class BlockingQueue
{
public:
BlockingQueue(void) {}
inline void post(T t)
{
std::lock_guard<std::mutex> lock(m);
q.push(t);
c.notify_one();
}
inline T get(void)
{
std::unique_lock<std::mutex> lock(m);
while(q.empty())
c.wait(lock);
T val = q.front();
q.pop();
return val;
}
private:
std::queue<T> q;
mutable std::mutex m;
std::condition_variable c;
};
} // namespace ZeroTier
#endif
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