diff options
Diffstat (limited to 'src/common')
-rw-r--r-- | src/common/CMakeLists.txt | 2 | ||||
-rw-r--r-- | src/common/dynamic_library.cpp | 106 | ||||
-rw-r--r-- | src/common/dynamic_library.h | 75 | ||||
-rw-r--r-- | src/common/file_util.cpp | 22 | ||||
-rw-r--r-- | src/common/thread.cpp | 9 |
5 files changed, 199 insertions, 15 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index fbebed715..eeceaa655 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -106,6 +106,8 @@ add_library(common STATIC common_funcs.h common_paths.h common_types.h + dynamic_library.cpp + dynamic_library.h file_util.cpp file_util.h hash.h diff --git a/src/common/dynamic_library.cpp b/src/common/dynamic_library.cpp new file mode 100644 index 000000000..7ab54e9e4 --- /dev/null +++ b/src/common/dynamic_library.cpp @@ -0,0 +1,106 @@ +// Copyright 2019 Dolphin Emulator Project +// Licensed under GPLv2+ +// Refer to the license.txt file included. + +#include <cstring> +#include <string> +#include <utility> + +#include <fmt/format.h> + +#include "common/dynamic_library.h" + +#ifdef _WIN32 +#include <windows.h> +#else +#include <dlfcn.h> +#endif + +namespace Common { + +DynamicLibrary::DynamicLibrary() = default; + +DynamicLibrary::DynamicLibrary(const char* filename) { + Open(filename); +} + +DynamicLibrary::DynamicLibrary(DynamicLibrary&& rhs) noexcept + : handle{std::exchange(rhs.handle, nullptr)} {} + +DynamicLibrary& DynamicLibrary::operator=(DynamicLibrary&& rhs) noexcept { + Close(); + handle = std::exchange(rhs.handle, nullptr); + return *this; +} + +DynamicLibrary::~DynamicLibrary() { + Close(); +} + +std::string DynamicLibrary::GetUnprefixedFilename(const char* filename) { +#if defined(_WIN32) + return std::string(filename) + ".dll"; +#elif defined(__APPLE__) + return std::string(filename) + ".dylib"; +#else + return std::string(filename) + ".so"; +#endif +} + +std::string DynamicLibrary::GetVersionedFilename(const char* libname, int major, int minor) { +#if defined(_WIN32) + if (major >= 0 && minor >= 0) + return fmt::format("{}-{}-{}.dll", libname, major, minor); + else if (major >= 0) + return fmt::format("{}-{}.dll", libname, major); + else + return fmt::format("{}.dll", libname); +#elif defined(__APPLE__) + const char* prefix = std::strncmp(libname, "lib", 3) ? "lib" : ""; + if (major >= 0 && minor >= 0) + return fmt::format("{}{}.{}.{}.dylib", prefix, libname, major, minor); + else if (major >= 0) + return fmt::format("{}{}.{}.dylib", prefix, libname, major); + else + return fmt::format("{}{}.dylib", prefix, libname); +#else + const char* prefix = std::strncmp(libname, "lib", 3) ? "lib" : ""; + if (major >= 0 && minor >= 0) + return fmt::format("{}{}.so.{}.{}", prefix, libname, major, minor); + else if (major >= 0) + return fmt::format("{}{}.so.{}", prefix, libname, major); + else + return fmt::format("{}{}.so", prefix, libname); +#endif +} + +bool DynamicLibrary::Open(const char* filename) { +#ifdef _WIN32 + handle = reinterpret_cast<void*>(LoadLibraryA(filename)); +#else + handle = dlopen(filename, RTLD_NOW); +#endif + return handle != nullptr; +} + +void DynamicLibrary::Close() { + if (!IsOpen()) + return; + +#ifdef _WIN32 + FreeLibrary(reinterpret_cast<HMODULE>(handle)); +#else + dlclose(handle); +#endif + handle = nullptr; +} + +void* DynamicLibrary::GetSymbolAddress(const char* name) const { +#ifdef _WIN32 + return reinterpret_cast<void*>(GetProcAddress(reinterpret_cast<HMODULE>(handle), name)); +#else + return reinterpret_cast<void*>(dlsym(handle, name)); +#endif +} + +} // namespace Common diff --git a/src/common/dynamic_library.h b/src/common/dynamic_library.h new file mode 100644 index 000000000..2a06372fd --- /dev/null +++ b/src/common/dynamic_library.h @@ -0,0 +1,75 @@ +// Copyright 2019 Dolphin Emulator Project +// Licensed under GPLv2+ +// Refer to the license.txt file included. + +#pragma once + +#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. + explicit DynamicLibrary(); + + /// Automatically loads the specified library. Call IsOpen() to check validity before use. + explicit DynamicLibrary(const char* filename); + + /// Moves the library. + DynamicLibrary(DynamicLibrary&&) noexcept; + DynamicLibrary& operator=(DynamicLibrary&&) noexcept; + + /// Delete copies, we can't copy a dynamic library. + DynamicLibrary(const DynamicLibrary&) = delete; + DynamicLibrary& operator=(const DynamicLibrary&) = delete; + + /// Closes the library. + ~DynamicLibrary(); + + /// 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 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* handle = nullptr; +}; + +} // namespace Common diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp index 41167f57a..35eee0096 100644 --- a/src/common/file_util.cpp +++ b/src/common/file_util.cpp @@ -3,6 +3,7 @@ // Refer to the license.txt file included. #include <array> +#include <limits> #include <memory> #include <sstream> #include <unordered_map> @@ -530,11 +531,11 @@ void CopyDir(const std::string& source_path, const std::string& dest_path) { std::optional<std::string> GetCurrentDir() { // Get the current working directory (getcwd uses malloc) #ifdef _WIN32 - wchar_t* dir; - if (!(dir = _wgetcwd(nullptr, 0))) { + wchar_t* dir = _wgetcwd(nullptr, 0); + if (!dir) { #else - char* dir; - if (!(dir = getcwd(nullptr, 0))) { + char* dir = getcwd(nullptr, 0); + if (!dir) { #endif LOG_ERROR(Common_Filesystem, "GetCurrentDirectory failed: {}", GetLastErrorMsg()); return {}; @@ -918,19 +919,22 @@ void IOFile::Swap(IOFile& other) noexcept { bool IOFile::Open(const std::string& filename, const char openmode[], int flags) { Close(); + bool m_good; #ifdef _WIN32 if (flags != 0) { m_file = _wfsopen(Common::UTF8ToUTF16W(filename).c_str(), Common::UTF8ToUTF16W(openmode).c_str(), flags); + m_good = m_file != nullptr; } else { - _wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(), - Common::UTF8ToUTF16W(openmode).c_str()); + m_good = _wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(), + Common::UTF8ToUTF16W(openmode).c_str()) == 0; } #else - m_file = fopen(filename.c_str(), openmode); + m_file = std::fopen(filename.c_str(), openmode); + m_good = m_file != nullptr; #endif - return IsOpen(); + return m_good; } bool IOFile::Close() { @@ -956,7 +960,7 @@ u64 IOFile::Tell() const { if (IsOpen()) return ftello(m_file); - return -1; + return std::numeric_limits<u64>::max(); } bool IOFile::Flush() { diff --git a/src/common/thread.cpp b/src/common/thread.cpp index fe7a420cc..0cd2d10bf 100644 --- a/src/common/thread.cpp +++ b/src/common/thread.cpp @@ -28,11 +28,8 @@ namespace Common { #ifdef _MSC_VER // Sets the debugger-visible name of the current thread. -// Uses undocumented (actually, it is now documented) trick. -// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsdebug/html/vxtsksettingthreadname.asp - -// This is implemented much nicer in upcoming msvc++, see: -// http://msdn.microsoft.com/en-us/library/xcb2z8hs(VS.100).aspx +// Uses trick documented in: +// https://docs.microsoft.com/en-us/visualstudio/debugger/how-to-set-a-thread-name-in-native-code void SetCurrentThreadName(const char* name) { static const DWORD MS_VC_EXCEPTION = 0x406D1388; @@ -47,7 +44,7 @@ void SetCurrentThreadName(const char* name) { info.dwType = 0x1000; info.szName = name; - info.dwThreadID = -1; // dwThreadID; + info.dwThreadID = std::numeric_limits<DWORD>::max(); info.dwFlags = 0; __try { |