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ConcurrentQueue.h
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ConcurrentQueue.h
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//
// ConcurrentQueue.h
//
//
// Created by Matthias Mueller-Hannemann on 23.07.14.
//
//
#ifndef _ConcurrentQueue_h
#define _ConcurrentQueue_h
#include <queue>
#include <thread>
#include <mutex>
#include <condition_variable>
template <typename T>
class ConcurrentQueue
{
public:
bool empty() {
std::unique_lock<std::mutex> mlock(mutex_);
return queue_.empty();
}
int size() {
std::unique_lock<std::mutex> mlock(mutex_);
return queue_.size();
}
T pop()
{
std::unique_lock<std::mutex> mlock(mutex_);
while (queue_.empty())
{
cond_.wait(mlock);
}
auto val = queue_.front();
queue_.pop();
return val;
}
bool tryPop (T& item){
std::unique_lock<std::mutex> mlock(mutex_);
if (queue_.empty()) return false;
item = queue_.front();
queue_.pop();
return true;
}
void push(const T& item)
{
std::unique_lock<std::mutex> mlock(mutex_);
queue_.push(item);
mlock.unlock();
cond_.notify_one();
}
ConcurrentQueue()=default;
ConcurrentQueue(const ConcurrentQueue&) = delete; // disable copying
ConcurrentQueue& operator=(const ConcurrentQueue&) = delete; // disable assignment
private:
std::queue<T> queue_;
std::mutex mutex_;
std::condition_variable cond_;
};
#endif