DynLib.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_DYNLIB_HPP
#define NAZARA_DYNLIB_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/MovablePtr.hpp>
#include <Nazara/Core/String.hpp>

#if defined(NAZARA_PLATFORM_WINDOWS)
    #define NAZARA_DYNLIB_EXTENSION ".dll"
#elif defined(NAZARA_PLATFORM_LINUX)
    #define NAZARA_DYNLIB_EXTENSION ".so"
#elif defined(NAZARA_PLATFORM_MACOSX)
    #define NAZARA_DYNLIB_EXTENSION ".dynlib"
#else
    #error OS not handled
#endif

#if NAZARA_CORE_THREADSAFE && NAZARA_THREADSAFETY_DYNLIB
    #include <Nazara/Core/ThreadSafety.hpp>
#else
    #include <Nazara/Core/ThreadSafetyOff.hpp>
#endif

namespace Nz
{
    using DynLibFunc = int (*)(); // "Generic" type of pointer to function

    class DynLibImpl;

    class NAZARA_CORE_API DynLib
    {
        public:
            DynLib();
            DynLib(const DynLib&) = delete;
            DynLib(DynLib&&) noexcept = default;
            ~DynLib();

            String GetLastError() const;
            DynLibFunc GetSymbol(const String& symbol) const;

            bool IsLoaded() const;

            bool Load(const String& libraryPath);
            void Unload();

            DynLib& operator=(const DynLib&) = delete;
            DynLib& operator=(DynLib&& lib) noexcept = default;

        private:
            NazaraMutexAttrib(m_mutex, mutable)

            mutable String m_lastError;
            MovablePtr<DynLibImpl> m_impl;
    };
}

#endif // NAZARA_DYNLIB_HPP