goldberg_emulator/overlay_experimental/System/Library.h

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2022-08-05 06:06:42 +00:00
/*
* Copyright (C) Nemirtingas
* This file is part of System.
*
* System is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* System is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with System; if not, see
* <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <string>
namespace System {
namespace Library {
class Library
{
class LibraryImpl* _Impl;
public:
Library();
Library(Library const& other);
Library(Library&& other) noexcept;
Library& operator=(Library const& other);
Library& operator=(Library&& other) noexcept;
~Library();
bool OpenLibrary(std::string const& library_name, bool append_extension);
void CloseLibrary();
void* GetVSymbol(std::string const& symbol_name) const;
template<typename T>
inline T* GetSymbol(std::string const& symbol_name) const
{
return reinterpret_cast<T*>(GetVSymbol(symbol_name));
}
std::string GetLibraryPath() const;
void* GetLibraryNativeHandle() const;
bool IsLoaded() const;
};
// Triies to load the library, I suggest that you use a Library instance instead
void* OpenLibrary(const char* library_name);
// Will decrease the OS' ref counter on the library, use it to close a handle opened by open_library.
// A Library instance will automatically call this in the destructor
void CloseLibrary(void* handle);
// Will try to retrieve a symbol address from the library handle
void* GetSymbol(void* handle, const char* symbol_name);
// Get a pointer to the library, if it is not loaded, will return nullptr. This doesn't increment the OS' internal ref counter
void* GetLibraryHandle(const char* library_name);
// Get the library path of a module handle
std::string GetLibraryPath(void* handle);
// Get the native extension representing a shared library.
std::string GetLibraryExtension();
}
}