Merge pull request #3594 from ReinUsesLisp/vk-instance
yuzu: Drop SDL2 and Qt frontend Vulkan requirementsmaster
bunnei
GitHub
commit
51c6688e21
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// Copyright 2019 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <cstring>
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#include <string>
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#include <utility>
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#include <fmt/format.h>
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#include "common/dynamic_library.h"
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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namespace Common {
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DynamicLibrary::DynamicLibrary() = default;
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DynamicLibrary::DynamicLibrary(const char* filename) {
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Open(filename);
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}
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DynamicLibrary::DynamicLibrary(DynamicLibrary&& rhs) noexcept
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: handle{std::exchange(rhs.handle, nullptr)} {}
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DynamicLibrary& DynamicLibrary::operator=(DynamicLibrary&& rhs) noexcept {
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Close();
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handle = std::exchange(rhs.handle, nullptr);
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return *this;
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}
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DynamicLibrary::~DynamicLibrary() {
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Close();
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}
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std::string DynamicLibrary::GetUnprefixedFilename(const char* filename) {
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#if defined(_WIN32)
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return std::string(filename) + ".dll";
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#elif defined(__APPLE__)
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return std::string(filename) + ".dylib";
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#else
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return std::string(filename) + ".so";
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#endif
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}
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std::string DynamicLibrary::GetVersionedFilename(const char* libname, int major, int minor) {
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#if defined(_WIN32)
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if (major >= 0 && minor >= 0)
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return fmt::format("{}-{}-{}.dll", libname, major, minor);
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else if (major >= 0)
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return fmt::format("{}-{}.dll", libname, major);
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else
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return fmt::format("{}.dll", libname);
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#elif defined(__APPLE__)
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const char* prefix = std::strncmp(libname, "lib", 3) ? "lib" : "";
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if (major >= 0 && minor >= 0)
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return fmt::format("{}{}.{}.{}.dylib", prefix, libname, major, minor);
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else if (major >= 0)
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return fmt::format("{}{}.{}.dylib", prefix, libname, major);
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else
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return fmt::format("{}{}.dylib", prefix, libname);
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#else
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const char* prefix = std::strncmp(libname, "lib", 3) ? "lib" : "";
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if (major >= 0 && minor >= 0)
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return fmt::format("{}{}.so.{}.{}", prefix, libname, major, minor);
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else if (major >= 0)
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return fmt::format("{}{}.so.{}", prefix, libname, major);
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else
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return fmt::format("{}{}.so", prefix, libname);
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#endif
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}
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bool DynamicLibrary::Open(const char* filename) {
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#ifdef _WIN32
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handle = reinterpret_cast<void*>(LoadLibraryA(filename));
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#else
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handle = dlopen(filename, RTLD_NOW);
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#endif
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return handle != nullptr;
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}
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void DynamicLibrary::Close() {
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if (!IsOpen())
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return;
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#ifdef _WIN32
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FreeLibrary(reinterpret_cast<HMODULE>(handle));
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#else
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dlclose(handle);
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#endif
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handle = nullptr;
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}
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void* DynamicLibrary::GetSymbolAddress(const char* name) const {
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#ifdef _WIN32
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return reinterpret_cast<void*>(GetProcAddress(reinterpret_cast<HMODULE>(handle), name));
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#else
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return reinterpret_cast<void*>(dlsym(handle, name));
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#endif
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}
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} // namespace Common
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@ -0,0 +1,75 @@
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// Copyright 2019 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <string>
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namespace Common {
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/**
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* Provides a platform-independent interface for loading a dynamic library and retrieving symbols.
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* The interface maintains an internal reference count to allow one handle to be shared between
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* multiple users.
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*/
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class DynamicLibrary final {
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public:
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/// Default constructor, does not load a library.
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explicit DynamicLibrary();
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/// Automatically loads the specified library. Call IsOpen() to check validity before use.
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explicit DynamicLibrary(const char* filename);
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/// Moves the library.
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DynamicLibrary(DynamicLibrary&&) noexcept;
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DynamicLibrary& operator=(DynamicLibrary&&) noexcept;
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/// Delete copies, we can't copy a dynamic library.
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DynamicLibrary(const DynamicLibrary&) = delete;
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DynamicLibrary& operator=(const DynamicLibrary&) = delete;
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/// Closes the library.
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~DynamicLibrary();
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/// Returns the specified library name with the platform-specific suffix added.
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static std::string GetUnprefixedFilename(const char* filename);
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/// Returns the specified library name in platform-specific format.
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/// Major/minor versions will not be included if set to -1.
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/// If libname already contains the "lib" prefix, it will not be added again.
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/// Windows: LIBNAME-MAJOR-MINOR.dll
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/// Linux: libLIBNAME.so.MAJOR.MINOR
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/// Mac: libLIBNAME.MAJOR.MINOR.dylib
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static std::string GetVersionedFilename(const char* libname, int major = -1, int minor = -1);
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/// Returns true if a module is loaded, otherwise false.
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bool IsOpen() const {
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return handle != nullptr;
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}
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/// Loads (or replaces) the handle with the specified library file name.
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/// Returns true if the library was loaded and can be used.
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bool Open(const char* filename);
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/// Unloads the library, any function pointers from this library are no longer valid.
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void Close();
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/// Returns the address of the specified symbol (function or variable) as an untyped pointer.
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/// If the specified symbol does not exist in this library, nullptr is returned.
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void* GetSymbolAddress(const char* name) const;
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/// Obtains the address of the specified symbol, automatically casting to the correct type.
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/// Returns true if the symbol was found and assigned, otherwise false.
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template <typename T>
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bool GetSymbol(const char* name, T* ptr) const {
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*ptr = reinterpret_cast<T>(GetSymbolAddress(name));
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return *ptr != nullptr;
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}
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private:
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/// Platform-dependent data type representing a dynamic library handle.
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void* handle = nullptr;
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};
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} // namespace Common
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