blob: e51840b0db8bb2d8bf62d6a36a450fc0afff6eb1 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include "base/base_export.h"
#include "base/basictypes.h"
typedef void* HANDLE;
namespace base {
namespace win {
// The running version of Windows. This is declared outside OSInfo for
// syntactic sugar reasons; see the declaration of GetVersion() below.
// NOTE: Keep these in order so callers can do things like
// "if (base::win::GetVersion() >= base::win::VERSION_VISTA) ...".
enum Version {
VERSION_PRE_XP = 0, // Not supported.
VERSION_SERVER_2003, // Also includes XP Pro x64 and Server 2003 R2.
VERSION_VISTA, // Also includes Windows Server 2008.
VERSION_WIN7, // Also includes Windows Server 2008 R2.
VERSION_WIN8, // Also includes Windows Server 2012.
VERSION_WIN8_1, // Code named Windows Blue
VERSION_WIN_LAST, // Indicates error condition.
// A rough bucketing of the available types of versions of Windows. This is used
// to distinguish enterprise enabled versions from home versions and potentially
// server versions.
enum VersionType {
// A singleton that can be used to query various pieces of information about the
// OS and process state. Note that this doesn't use the base Singleton class, so
// it can be used without an AtExitManager.
class BASE_EXPORT OSInfo {
struct VersionNumber {
int major;
int minor;
int build;
struct ServicePack {
int major;
int minor;
// The processor architecture this copy of Windows natively uses. For
// example, given an x64-capable processor, we have three possibilities:
// 32-bit Chrome running on 32-bit Windows: X86_ARCHITECTURE
// 32-bit Chrome running on 64-bit Windows via WOW64: X64_ARCHITECTURE
// 64-bit Chrome running on 64-bit Windows: X64_ARCHITECTURE
enum WindowsArchitecture {
// Whether a process is running under WOW64 (the wrapper that allows 32-bit
// processes to run on 64-bit versions of Windows). This will return
// WOW64_DISABLED for both "32-bit Chrome on 32-bit Windows" and "64-bit
// Chrome on 64-bit Windows". WOW64_UNKNOWN means "an error occurred", e.g.
// the process does not have sufficient access rights to determine this.
enum WOW64Status {
static OSInfo* GetInstance();
Version version() const { return version_; }
// The next two functions return arrays of values, [major, minor(, build)].
VersionNumber version_number() const { return version_number_; }
VersionType version_type() const { return version_type_; }
ServicePack service_pack() const { return service_pack_; }
WindowsArchitecture architecture() const { return architecture_; }
int processors() const { return processors_; }
size_t allocation_granularity() const { return allocation_granularity_; }
WOW64Status wow64_status() const { return wow64_status_; }
std::string processor_model_name();
// Like wow64_status(), but for the supplied handle instead of the current
// process. This doesn't touch member state, so you can bypass the singleton.
static WOW64Status GetWOW64StatusForProcess(HANDLE process_handle);
Version version_;
VersionNumber version_number_;
VersionType version_type_;
ServicePack service_pack_;
WindowsArchitecture architecture_;
int processors_;
size_t allocation_granularity_;
WOW64Status wow64_status_;
std::string processor_model_name_;
// Because this is by far the most commonly-requested value from the above
// singleton, we add a global-scope accessor here as syntactic sugar.
BASE_EXPORT Version GetVersion();
} // namespace win
} // namespace base