116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
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#pragma once
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#if !defined(MIJIN_UTIL_OS_HPP_INCLUDED)
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#define MIJIN_UTIL_OS_HPP_INCLUDED 1
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#include <csignal>
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#include <string>
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#include <string_view>
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#include <utility>
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#include "../detect.hpp"
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#include "../internal/common.hpp"
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#include "../types/result.hpp"
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namespace mijin
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{
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//
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// public defines
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//
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//
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// public constants
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//
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#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
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inline const std::string_view LIBRARY_EXT = "so";
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#elif MIJIN_TARGET_OS == MIJIN_OS_WINDOWS
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inline const std::string_view LIBRARY_EXT = "dll";
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#else
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[[deprecated("OS not supported.")]]
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inline const int LIBRARY_EXT = 0;
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#endif
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//
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// public types
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//
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struct LibraryHandle
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{
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void* data = nullptr;
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constexpr operator bool() const MIJIN_NOEXCEPT { return data != nullptr; }
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constexpr bool operator!() const MIJIN_NOEXCEPT { return data == nullptr; }
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};
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class SharedLibrary
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{
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private:
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LibraryHandle mHandle;
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public:
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SharedLibrary() MIJIN_NOEXCEPT = default;
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SharedLibrary(const SharedLibrary&) = delete;
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SharedLibrary(SharedLibrary&& other) MIJIN_NOEXCEPT : mHandle(std::exchange(other.mHandle, {})) {}
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inline ~SharedLibrary() MIJIN_NOEXCEPT;
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SharedLibrary& operator=(const SharedLibrary&) = delete;
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SharedLibrary& operator=(SharedLibrary&& other) MIJIN_NOEXCEPT
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{
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mHandle = std::exchange(other.mHandle, {});
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return *this;
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}
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constexpr operator bool() const MIJIN_NOEXCEPT { return static_cast<bool>(mHandle); }
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constexpr bool operator!() const MIJIN_NOEXCEPT { return !mHandle; }
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[[nodiscard]] inline Result<bool> open(std::string_view libraryFile) MIJIN_NOEXCEPT;
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inline bool close() MIJIN_NOEXCEPT;
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[[nodiscard]] inline void* loadSymbol(const char* symbolName) MIJIN_NOEXCEPT;
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};
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//
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// public functions
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//
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[[nodiscard]] Result<LibraryHandle> openSharedLibrary(std::string_view libraryFile) MIJIN_NOEXCEPT;
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bool closeSharedLibrary(const LibraryHandle library) MIJIN_NOEXCEPT;
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[[nodiscard]] void* loadSymbolFromLibrary(const LibraryHandle library, const char* symbolName) MIJIN_NOEXCEPT;
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void setCurrentThreadName(const char* threadName) MIJIN_NOEXCEPT;
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[[nodiscard]] std::string makeLibraryFilename(std::string_view libraryName) MIJIN_NOEXCEPT;
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SharedLibrary::~SharedLibrary() MIJIN_NOEXCEPT
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{
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close();
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}
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Result<bool> SharedLibrary::open(std::string_view libraryFile) MIJIN_NOEXCEPT
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{
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close();
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Result<LibraryHandle> openResult = openSharedLibrary(libraryFile);
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if (openResult.isSuccess())
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{
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mHandle = openResult.getValue();
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return true;
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}
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return ResultError(openResult.getError());
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}
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bool SharedLibrary::close() MIJIN_NOEXCEPT
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{
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if (mHandle)
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{
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return closeSharedLibrary(std::exchange(mHandle, {}));
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}
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return false;
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}
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void* SharedLibrary::loadSymbol(const char* symbolName) MIJIN_NOEXCEPT
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{
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return loadSymbolFromLibrary(mHandle, symbolName);
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}
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} // namespace mijin
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#endif // !defined(MIJIN_UTIL_OS_HPP_INCLUDED)
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