UniqueReadLock.hpp

#pragma once

#include <samchon/library/RWMutex.hpp>

namespace samchon
{
namespace library
{
    class UniqueReadLock
    {
    private:
        const RWMutex *rw_mutex;

        bool locked;

    public:
        /* -----------------------------------------------------------
            CONSTRUCTORS
        ----------------------------------------------------------- */
        UniqueReadLock(const RWMutex &rw_mutex, bool lock = true)
        {
            this->rw_mutex = &rw_mutex;
            this->locked = false;

            if (lock == true)
                this->lock();
        };

        UniqueReadLock(const UniqueReadLock &) = delete;

        UniqueReadLock(UniqueReadLock &&obj)
        {
            //MOVE
            this->rw_mutex = obj.rw_mutex;
            this->locked = obj.locked;

            //TRUNCATE
            obj.rw_mutex = nullptr;
            obj.locked = false;
        };

        ~UniqueReadLock()
        {
            if (locked == true)
                rw_mutex->readUnlock();
        }

        /* -----------------------------------------------------------
            LOCKERS
        ----------------------------------------------------------- */
        void lock() const
        {
            if (locked == true)
                return;

            rw_mutex->readLock();
            (bool&)locked = true;
        };

        void unlock() const
        {
            if (locked == false)
                return;

            rw_mutex->readUnlock();
            (bool&)locked = false;
        };

        //auto tryLock() const -> bool;
    };
};
};