//-----------------------------------------------
// shared.h: reader-priority
//-----------------------------------------------

#ifndef shared_h
#define shared_h

//-----------------------------------------------

#include <cstddef>      // std::size_t
#include <shared_mutex> // std::shared_mutex

//-----------------------------------------------

class shared_lock
{
public:
    shared_lock(std::size_t) {}
    void reader_lock() { sm.lock_shared(); }
    void reader_unlock() { sm.unlock_shared(); }
    void writer_lock() { sm.lock(); }
    void writer_unlock() { sm.unlock(); }

private:
    std::shared_mutex sm;
};

//-----------------------------------------------

#endif // shared_h