mirror of
https://github.com/Xaymar/obs-StreamFX
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105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
// Copyright (c) 2020 Michael Fabian Dirks <info@xaymar.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "util-library.hpp"
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#include <unordered_map>
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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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#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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util::library::library(std::filesystem::path file) : _library(nullptr)
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{
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#if defined(ST_WINDOWS)
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SetLastError(ERROR_SUCCESS);
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_library = reinterpret_cast<void*>(LoadLibraryW(file.wstring().c_str()));
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if (!_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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std::string ex = "Failed to load library.";
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FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_ALLOCATE_BUFFER,
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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("Failed to load library.");
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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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util::library::~library()
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{
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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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void* 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<::util::library>> libraries;
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std::shared_ptr<::util::library> 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<::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<::util::library> 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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