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