c++实现多线程消息通信队列

#ifndef _SYNC_SIMPLEQUEUE_QUEUE_HPP_

#define _SYNC_SIMPLEQUEUE_QUEUE_HPP_

#include <queue>

using namespace std;

namespace utility {

#ifndef _SYNC_SIMPLEQUEUE_QUEUE_HPP_

#define _SYNC_SIMPLEQUEUE_QUEUE_HPP_

#include <queue>

using namespace std;

namespace utility {

template <typename T>

class SyncSimpleQueue {

public:

void put(const T& msg) {

std::unique_lock<std::mutex> guard(m_mutex);

m_queue.push(msg);

if (m_queue.size() == 1) {

can_read.notify_one();

}

}

T take() {

std::unique_lock<std::mutex> guard(m_mutex);

if (m_queue.empty()) {

//guard在队列位空时释放锁，保证其他线程可以操作共享的数据，当队列不为空时并且其他线程调用notify_one时，重新获得锁，继续操作数据

can_read.wait(guard, [this]() { return !m_queue.empty(); });

}

T msg = m_queue.front();

m_queue.pop();

return msg;

}

bool take_no_wait(T& msg) {

std::unique_lock<std::mutex> guard(m_mutex);

if (m_queue.empty()) {

return false;

}

msg = m_queue.front();

m_queue.pop();

return true;

}

private:

std::queue<T> m_queue;

std::mutex m_mutex;

std::condition_variable can_read;

};

} // namespace utility

#endif