mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-11-14 21:37:52 -07:00
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
// Copyright 2019 Dolphin Emulator Project
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#pragma once
|
|
#include <atomic>
|
|
#include <string>
|
|
|
|
namespace Common
|
|
{
|
|
/**
|
|
* Provides a platform-independent interface for loading a dynamic library and retrieving symbols.
|
|
* The interface maintains an internal reference count to allow one handle to be shared between
|
|
* multiple users.
|
|
*/
|
|
class DynamicLibrary final
|
|
{
|
|
public:
|
|
// Default constructor, does not load a library.
|
|
DynamicLibrary();
|
|
|
|
// Automatically loads the specified library. Call IsOpen() to check validity before use.
|
|
DynamicLibrary(const char* filename);
|
|
|
|
DynamicLibrary(void* handle);
|
|
|
|
// Closes the library.
|
|
~DynamicLibrary();
|
|
|
|
DynamicLibrary(const DynamicLibrary&) = delete;
|
|
DynamicLibrary(DynamicLibrary&&) = delete;
|
|
|
|
DynamicLibrary& operator=(const DynamicLibrary&) = delete;
|
|
DynamicLibrary& operator=(DynamicLibrary&&) = delete;
|
|
|
|
DynamicLibrary& operator=(void*);
|
|
|
|
// Returns the specified library name with the platform-specific suffix added.
|
|
static std::string GetUnprefixedFilename(const char* filename);
|
|
|
|
// Returns the specified library name in platform-specific format.
|
|
// Major/minor versions will not be included if set to -1.
|
|
// If libname already contains the "lib" prefix, it will not be added again.
|
|
// Windows: LIBNAME-MAJOR-MINOR.dll
|
|
// Linux: libLIBNAME.so.MAJOR.MINOR
|
|
// Mac: libLIBNAME.MAJOR.MINOR.dylib
|
|
static std::string GetVersionedFilename(const char* libname, int major = -1, int minor = -1);
|
|
|
|
// Returns true if a module is loaded, otherwise false.
|
|
bool IsOpen() const { return m_handle != nullptr; }
|
|
|
|
// Loads (or replaces) the handle with the specified library file name.
|
|
// Returns true if the library was loaded and can be used.
|
|
bool Open(const char* filename);
|
|
|
|
// Unloads the library, any function pointers from this library are no longer valid.
|
|
void Close();
|
|
|
|
// Returns the address of the specified symbol (function or variable) as an untyped pointer.
|
|
// If the specified symbol does not exist in this library, nullptr is returned.
|
|
void* GetSymbolAddress(const char* name) const;
|
|
|
|
// Obtains the address of the specified symbol, automatically casting to the correct type.
|
|
// Returns true if the symbol was found and assigned, otherwise false.
|
|
template <typename T>
|
|
bool GetSymbol(const char* name, T* ptr) const
|
|
{
|
|
*ptr = reinterpret_cast<T>(GetSymbolAddress(name));
|
|
return *ptr != nullptr;
|
|
}
|
|
|
|
private:
|
|
// Platform-dependent data type representing a dynamic library handle.
|
|
void* m_handle = nullptr;
|
|
};
|
|
|
|
} // namespace Common
|