runtime_library.h

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// MIT License
//
// Copyright (c) 2019 Ruhr University Bochum, Chair for Embedded Security. All Rights reserved.
// Copyright (c) 2019 Marc Fyrbiak, Sebastian Wallat, Max Hoffmann ("ORIGINAL AUTHORS"). All rights reserved.
// Copyright (c) 2021 Max Planck Institute for Security and Privacy. All Rights reserved.
// Copyright (c) 2021 Jörn Langheinrich, Julian Speith, Nils Albartus, René Walendy, Simon Klix ("ORIGINAL AUTHORS"). All Rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#pragma once
 
#include "hal_core/defines.h"
 
#include <string>
 
namespace hal
{
// operating systems independent type definitions for function and handle access
#ifdef _WIN32
#include <windows.h>
    using lib_fn_ptr_t = FARPROC;
    using handle_ptr_t = HINSTANCE;
#else
#include <dlfcn.h>
    using lib_fn_ptr_t = void (*)();
    using handle_ptr_t = void*;
#endif
 
    class CORE_API RuntimeLibrary
    {
    public:
        RuntimeLibrary();
 
        ~RuntimeLibrary();
 
        bool load_library(const std::string& file_name);
 
        std::string get_file_name() const;
 
        bool unload_library();
 
        lib_fn_ptr_t get_function(const std::string& function_name);
 
    private:
        // stores the file name of the library
        std::string m_file_name;
 
        // stores the handle_ptr_t to the library
        handle_ptr_t m_handle;
    };
}    // namespace hal