147 lines
4.5 KiB
C++
147 lines
4.5 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2022 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <malloc.h>
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#include <cstring>
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#include "xenia/base/cvar.h"
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#include "xenia/base/logging.h"
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#include "xenia/base/main_win.h"
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#include "xenia/base/platform_win.h"
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#include "xenia/base/string.h"
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// Autogenerated by `xb premake`.
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#include "build/version.h"
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// For RequestWin32MMCSS.
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#include <dwmapi.h>
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// For RequestWin32HighResolutionTimer.
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#include <winternl.h>
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DEFINE_bool(win32_high_resolution_timer, true,
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"Requests high-resolution timer from the NT kernel", "Win32");
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DEFINE_bool(
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win32_mmcss, true,
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"Opt in the Multimedia Class Scheduler Service (MMCSS) scheduling for "
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"prioritized access to CPU resources",
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"Win32");
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namespace xe {
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static void RequestWin32HighResolutionTimer() {
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HMODULE ntdll_module = GetModuleHandleW(L"ntdll.dll");
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if (!ntdll_module) {
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return;
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}
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// clang-format off
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NTSTATUS (NTAPI* nt_query_timer_resolution)(OUT PULONG MinimumResolution,
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OUT PULONG MaximumResolution,
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OUT PULONG CurrentResolution);
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NTSTATUS (NTAPI* nt_set_timer_resolution)(IN ULONG DesiredResolution,
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IN BOOLEAN SetResolution,
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OUT PULONG CurrentResolution);
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// clang-format on
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nt_query_timer_resolution =
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reinterpret_cast<decltype(nt_query_timer_resolution)>(
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GetProcAddress(ntdll_module, "NtQueryTimerResolution"));
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nt_set_timer_resolution = reinterpret_cast<decltype(nt_set_timer_resolution)>(
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GetProcAddress(ntdll_module, "NtSetTimerResolution"));
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if (!nt_query_timer_resolution || !nt_set_timer_resolution) {
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return;
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}
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ULONG minimum_resolution, maximum_resolution, current_resolution;
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nt_query_timer_resolution(&minimum_resolution, &maximum_resolution,
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¤t_resolution);
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nt_set_timer_resolution(maximum_resolution, TRUE, ¤t_resolution);
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}
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static void RequestWin32MMCSS() {
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HMODULE dwmapi_module = LoadLibraryW(L"dwmapi.dll");
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if (!dwmapi_module) {
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return;
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}
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// clang-format off
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HRESULT (STDAPICALLTYPE* dwm_enable_mmcss)(BOOL fEnableMMCSS);
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// clang-format on
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dwm_enable_mmcss = reinterpret_cast<decltype(dwm_enable_mmcss)>(
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GetProcAddress(dwmapi_module, "DwmEnableMMCSS"));
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if (dwm_enable_mmcss) {
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dwm_enable_mmcss(TRUE);
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}
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FreeLibrary(dwmapi_module);
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}
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bool ParseWin32LaunchArguments(
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bool transparent_options, const std::string_view positional_usage,
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const std::vector<std::string>& positional_options,
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std::vector<std::string>* args_out) {
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auto command_line = GetCommandLineW();
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int wargc;
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wchar_t** wargv = CommandLineToArgvW(command_line, &wargc);
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if (!wargv) {
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return false;
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}
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// Convert all args to narrow, as cxxopts doesn't support wchar.
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int argc = wargc;
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char** argv = reinterpret_cast<char**>(alloca(sizeof(char*) * argc));
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for (int n = 0; n < argc; n++) {
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size_t len = std::wcstombs(nullptr, wargv[n], 0);
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argv[n] = reinterpret_cast<char*>(alloca(sizeof(char) * (len + 1)));
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std::wcstombs(argv[n], wargv[n], len + 1);
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}
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LocalFree(wargv);
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if (!transparent_options) {
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cvar::ParseLaunchArguments(argc, argv, positional_usage,
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positional_options);
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}
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if (args_out) {
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args_out->clear();
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for (int n = 0; n < argc; n++) {
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args_out->push_back(std::string(argv[n]));
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}
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}
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return true;
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}
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int InitializeWin32App(const std::string_view app_name) {
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// Initialize logging. Needs parsed FLAGS.
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xe::InitializeLogging(app_name);
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// Print version info.
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XELOGI(
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"Build: "
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#ifdef XE_BUILD_IS_PR
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"PR#" XE_BUILD_PR_NUMBER " " XE_BUILD_PR_REPO " " XE_BUILD_PR_BRANCH
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"@" XE_BUILD_PR_COMMIT_SHORT " against "
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#endif
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XE_BUILD_BRANCH "@" XE_BUILD_COMMIT_SHORT " on " XE_BUILD_DATE);
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// Request high-performance timing and scheduling.
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if (cvars::win32_high_resolution_timer) {
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RequestWin32HighResolutionTimer();
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}
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if (cvars::win32_mmcss) {
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RequestWin32MMCSS();
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}
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return 0;
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}
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void ShutdownWin32App() { xe::ShutdownLogging(); }
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} // namespace xe
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