xenia-canary/src/xenia/base/main_win.cc

147 lines
4.5 KiB
C++

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