Semaphore.h

#ifndef __INC_METIN_II_SEMAPHORE_H__
#define __INC_METIN_II_SEMAPHORE_H__

class CSemaphore
{
private:
    std::mutex m_mutex;
    std::condition_variable m_cv;
    size_t m_count;
public:
    CSemaphore() : m_mutex(), m_count(0)
        {}

    inline void Wait() {
        std::unique_lock<std::mutex> lg(m_mutex);
        m_cv.wait(lg, [this] { return this->m_count > 0; });
        m_count--;
    }

    inline void Release() {
        m_mutex.lock();
        m_count++;
        m_mutex.unlock();
        m_cv.notify_one();
    }

    inline size_t available() const {
        return m_count;
    }
};

#endif