1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_WIN_WINDOWS_VERSION_H_ 6 #define BASE_WIN_WINDOWS_VERSION_H_ 7 #pragma once 8 9 #include "base/base_api.h" 10 #include "base/memory/singleton.h" 11 12 typedef void* HANDLE; 13 14 namespace base { 15 namespace win { 16 17 // The running version of Windows. This is declared outside OSInfo for 18 // syntactic sugar reasons; see the declaration of GetVersion() below. 19 // NOTE: Keep these in order so callers can do things like 20 // "if (base::win::GetVersion() >= base::win::VERSION_VISTA) ...". 21 enum Version { 22 VERSION_PRE_XP = 0, // Not supported. 23 VERSION_XP, 24 VERSION_SERVER_2003, // Also includes Windows XP Professional x64. 25 VERSION_VISTA, 26 VERSION_SERVER_2008, 27 VERSION_WIN7, 28 }; 29 30 // A Singleton that can be used to query various pieces of information about the 31 // OS and process state. 32 class BASE_API OSInfo { 33 public: 34 struct VersionNumber { 35 int major; 36 int minor; 37 int build; 38 }; 39 40 struct ServicePack { 41 int major; 42 int minor; 43 }; 44 45 // The processor architecture this copy of Windows natively uses. For 46 // example, given an x64-capable processor, we have three possibilities: 47 // 32-bit Chrome running on 32-bit Windows: X86_ARCHITECTURE 48 // 32-bit Chrome running on 64-bit Windows via WOW64: X64_ARCHITECTURE 49 // 64-bit Chrome running on 64-bit Windows: X64_ARCHITECTURE 50 enum WindowsArchitecture { 51 X86_ARCHITECTURE, 52 X64_ARCHITECTURE, 53 IA64_ARCHITECTURE, 54 OTHER_ARCHITECTURE, 55 }; 56 57 // Whether a process is running under WOW64 (the wrapper that allows 32-bit 58 // processes to run on 64-bit versions of Windows). This will return 59 // WOW64_DISABLED for both "32-bit Chrome on 32-bit Windows" and "64-bit 60 // Chrome on 64-bit Windows". WOW64_UNKNOWN means "an error occurred", e.g. 61 // the process does not have sufficient access rights to determine this. 62 enum WOW64Status { 63 WOW64_DISABLED, 64 WOW64_ENABLED, 65 WOW64_UNKNOWN, 66 }; 67 68 static OSInfo* GetInstance(); 69 70 Version version() const { return version_; } 71 // The next two functions return arrays of values, [major, minor(, build)]. 72 VersionNumber version_number() const { return version_number_; } 73 ServicePack service_pack() const { return service_pack_; } 74 WindowsArchitecture architecture() const { return architecture_; } 75 int processors() const { return processors_; } 76 size_t allocation_granularity() const { return allocation_granularity_; } 77 WOW64Status wow64_status() const { return wow64_status_; } 78 79 // Like wow64_status(), but for the supplied handle instead of the current 80 // process. This doesn't touch member state, so you can bypass the singleton. 81 static WOW64Status GetWOW64StatusForProcess(HANDLE process_handle); 82 83 private: 84 OSInfo(); 85 ~OSInfo(); 86 87 Version version_; 88 VersionNumber version_number_; 89 ServicePack service_pack_; 90 WindowsArchitecture architecture_; 91 int processors_; 92 size_t allocation_granularity_; 93 WOW64Status wow64_status_; 94 95 friend struct DefaultSingletonTraits<OSInfo>; 96 DISALLOW_COPY_AND_ASSIGN(OSInfo); 97 }; 98 99 // Because this is by far the most commonly-requested value from the above 100 // singleton, we add a global-scope accessor here as syntactic sugar. 101 BASE_API Version GetVersion(); 102 103 } // namespace win 104 } // namespace base 105 106 #endif // BASE_WIN_WINDOWS_VERSION_H_ 107
