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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "CpuInfo.h"
#include <windows.h>
namespace mozilla {
int GetCpuFrequencyMHz() {
static const int frequency = []() {
// Get the nominal CPU frequency.
DWORD data;
DWORD len = sizeof(data);
if (::RegGetValueW(HKEY_LOCAL_MACHINE,
LR"(HARDWARE\DESCRIPTION\System\CentralProcessor\0)",
L"~Mhz", RRF_RT_REG_DWORD, nullptr, &data,
&len) == ERROR_SUCCESS) {
return static_cast<int>(data);
}
return 0;
}();
return frequency;
}
} // namespace mozilla