mirror of https://github.com/Xaymar/obs-StreamFX
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
// AUTOGENERATED COPYRIGHT HEADER START
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// Copyright (C) 2020-2023 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
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// Copyright (C) 2022 lainon <GermanAizek@yandex.ru>
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// AUTOGENERATED COPYRIGHT HEADER END
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#include "util-library.hpp"
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#include "util-platform.hpp"
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#if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__) // Windows
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#define ST_WINDOWS
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#else
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#define ST_UNIX
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#endif
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#include "warning-disable.hpp"
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#include <unordered_map>
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#if defined(ST_WINDOWS)
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#include <Windows.h>
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#elif defined(ST_UNIX)
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#include <dlfcn.h>
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#endif
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#include "warning-enable.hpp"
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streamfx::util::library::library(std::filesystem::path file) : _library(nullptr), _owner(true)
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{
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#if defined(ST_WINDOWS)
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SetLastError(ERROR_SUCCESS);
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auto wfile = ::streamfx::util::platform::utf8_to_native(file.u8string());
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if (file.is_absolute()) {
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_library = reinterpret_cast<void*>(LoadLibraryExW(wfile.c_str(), nullptr, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR));
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} else {
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_library = reinterpret_cast<void*>(LoadLibraryExW(wfile.c_str(), nullptr, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS));
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}
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if (!_library) {
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std::string ex = "Failed to load library.";
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DWORD error = GetLastError();
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if (error != ERROR_PROC_NOT_FOUND) {
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PSTR message = NULL;
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FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, error, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), (LPSTR)&message, 0, NULL);
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if (message) {
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ex = message;
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LocalFree(message);
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throw std::runtime_error(ex);
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}
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}
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throw std::runtime_error(ex);
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}
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#elif defined(ST_UNIX)
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_library = dlopen(file.u8string().c_str(), RTLD_LAZY);
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if (!_library) {
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if (char* error = dlerror(); error)
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throw std::runtime_error(error);
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else
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throw std::runtime_error("Failed to load library.");
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}
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#endif
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}
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streamfx::util::library::library(obs_module_t* library) : _library(obs_get_module_lib(library)), _owner(false) {}
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streamfx::util::library::~library()
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{
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if (_owner) {
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#if defined(ST_WINDOWS)
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FreeLibrary(reinterpret_cast<HMODULE>(_library));
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#elif defined(ST_UNIX)
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dlclose(_library);
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#endif
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}
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}
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void* streamfx::util::library::load_symbol(std::string_view name)
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{
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#if defined(ST_WINDOWS)
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return reinterpret_cast<void*>(GetProcAddress(reinterpret_cast<HMODULE>(_library), name.data()));
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#elif defined(ST_UNIX)
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return reinterpret_cast<void*>(dlsym(_library, name.data()));
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#endif
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}
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static std::unordered_map<std::string, std::weak_ptr<::streamfx::util::library>> libraries;
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std::shared_ptr<::streamfx::util::library> streamfx::util::library::load(std::filesystem::path file)
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{
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auto kv = libraries.find(file.u8string());
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if (kv != libraries.end()) {
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if (auto ptr = kv->second.lock(); ptr)
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return ptr;
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libraries.erase(kv);
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}
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auto ptr = std::make_shared<::streamfx::util::library>(file);
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libraries.emplace(file.u8string(), ptr);
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return ptr;
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}
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std::shared_ptr<::streamfx::util::library> streamfx::util::library::load(std::string_view name)
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{
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return load(std::filesystem::u8path(name));
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}
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std::shared_ptr<::streamfx::util::library> streamfx::util::library::load(obs_module_t* instance)
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{
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if (!instance) {
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throw std::runtime_error("Can't load nullptr as a library.");
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}
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// Get an absolute path to the module.
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auto path = std::filesystem::absolute(std::filesystem::u8path(obs_get_module_binary_path(instance)));
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// Find by absolute path.
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auto kv = libraries.find(path.u8string());
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if (kv != libraries.end()) {
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if (auto ptr = kv->second.lock(); ptr) {
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return ptr;
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}
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libraries.erase(kv);
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}
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// If neither matches, add it to the registry.
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std::shared_ptr<::streamfx::util::library> ptr{new ::streamfx::util::library(instance)};
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libraries.emplace(path.u8string(), ptr);
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return ptr;
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}
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