112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/win/windows_version.h"
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#include <windows.h>
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#include "base/logging.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/win/registry.h"
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namespace base {
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namespace win {
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// static
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OSInfo* OSInfo::GetInstance() {
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// Note: we don't use the Singleton class because it depends on AtExitManager,
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// and it's convenient for other modules to use this classs without it. This
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// pattern is copied from gurl.cc.
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static OSInfo* info;
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if (!info) {
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OSInfo* new_info = new OSInfo();
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if (InterlockedCompareExchangePointer(
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reinterpret_cast<PVOID*>(&info), new_info, NULL)) {
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delete new_info;
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}
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}
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return info;
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}
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OSInfo::OSInfo()
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: version_(VERSION_PRE_XP),
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architecture_(OTHER_ARCHITECTURE),
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wow64_status_(GetWOW64StatusForProcess(GetCurrentProcess())) {
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OSVERSIONINFOEX version_info = { sizeof version_info };
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GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&version_info));
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version_number_.major = version_info.dwMajorVersion;
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version_number_.minor = version_info.dwMinorVersion;
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version_number_.build = version_info.dwBuildNumber;
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if ((version_number_.major == 5) && (version_number_.minor > 0)) {
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// Treat XP Pro x64, Home Server, and Server 2003 R2 as Server 2003.
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version_ = (version_number_.minor == 1) ? VERSION_XP : VERSION_SERVER_2003;
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} else if (version_number_.major == 6) {
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switch (version_number_.minor) {
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case 0:
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// Treat Windows Server 2008 the same as Windows Vista.
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version_ = VERSION_VISTA;
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break;
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case 1:
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// Treat Windows Server 2008 R2 the same as Windows 7.
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version_ = VERSION_WIN7;
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break;
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default:
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DCHECK_EQ(version_number_.minor, 2);
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// Treat Windows Server 2012 the same as Windows 8.
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version_ = VERSION_WIN8;
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break;
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}
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} else if (version_number_.major > 6) {
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NOTREACHED();
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version_ = VERSION_WIN_LAST;
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}
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service_pack_.major = version_info.wServicePackMajor;
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service_pack_.minor = version_info.wServicePackMinor;
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SYSTEM_INFO system_info = { 0 };
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GetNativeSystemInfo(&system_info);
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switch (system_info.wProcessorArchitecture) {
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case PROCESSOR_ARCHITECTURE_INTEL: architecture_ = X86_ARCHITECTURE; break;
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case PROCESSOR_ARCHITECTURE_AMD64: architecture_ = X64_ARCHITECTURE; break;
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case PROCESSOR_ARCHITECTURE_IA64: architecture_ = IA64_ARCHITECTURE; break;
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}
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processors_ = system_info.dwNumberOfProcessors;
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allocation_granularity_ = system_info.dwAllocationGranularity;
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}
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OSInfo::~OSInfo() {
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}
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std::string OSInfo::processor_model_name() {
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if (processor_model_name_.empty()) {
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const wchar_t kProcessorNameString[] =
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L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0";
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base::win::RegKey key(HKEY_LOCAL_MACHINE, kProcessorNameString, KEY_READ);
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string16 value;
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key.ReadValue(L"ProcessorNameString", &value);
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processor_model_name_ = UTF16ToUTF8(value);
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}
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return processor_model_name_;
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}
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// static
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OSInfo::WOW64Status OSInfo::GetWOW64StatusForProcess(HANDLE process_handle) {
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typedef BOOL (WINAPI* IsWow64ProcessFunc)(HANDLE, PBOOL);
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IsWow64ProcessFunc is_wow64_process = reinterpret_cast<IsWow64ProcessFunc>(
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GetProcAddress(GetModuleHandle(L"kernel32.dll"), "IsWow64Process"));
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if (!is_wow64_process)
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return WOW64_DISABLED;
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BOOL is_wow64 = FALSE;
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if (!(*is_wow64_process)(process_handle, &is_wow64))
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return WOW64_UNKNOWN;
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return is_wow64 ? WOW64_ENABLED : WOW64_DISABLED;
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}
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Version GetVersion() {
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return OSInfo::GetInstance()->version();
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}
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} // namespace win
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} // namespace base
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