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| 1 // Copyright (c) 2012 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_SYS_INFO_H_ | |
| 6 #define BASE_SYS_INFO_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/base_export.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/files/file_path.h" | |
| 14 #include "base/time/time.h" | |
| 15 #include "build/build_config.h" | |
| 16 | |
| 17 namespace base { | |
| 18 | |
| 19 class BASE_EXPORT SysInfo { | |
| 20 public: | |
| 21 // Return the number of logical processors/cores on the current machine. | |
| 22 static int NumberOfProcessors(); | |
| 23 | |
| 24 // Return the number of bytes of physical memory on the current machine. | |
| 25 static int64 AmountOfPhysicalMemory(); | |
| 26 | |
| 27 // Return the number of bytes of current available physical memory on the | |
| 28 // machine. | |
| 29 static int64 AmountOfAvailablePhysicalMemory(); | |
| 30 | |
| 31 // Return the number of bytes of virtual memory of this process. A return | |
| 32 // value of zero means that there is no limit on the available virtual | |
| 33 // memory. | |
| 34 static int64 AmountOfVirtualMemory(); | |
| 35 | |
| 36 // Return the number of megabytes of physical memory on the current machine. | |
| 37 static int AmountOfPhysicalMemoryMB() { | |
| 38 return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024); | |
| 39 } | |
| 40 | |
| 41 // Return the number of megabytes of available virtual memory, or zero if it | |
| 42 // is unlimited. | |
| 43 static int AmountOfVirtualMemoryMB() { | |
| 44 return static_cast<int>(AmountOfVirtualMemory() / 1024 / 1024); | |
| 45 } | |
| 46 | |
| 47 // Return the available disk space in bytes on the volume containing |path|, | |
| 48 // or -1 on failure. | |
| 49 static int64 AmountOfFreeDiskSpace(const FilePath& path); | |
| 50 | |
| 51 // Returns system uptime in milliseconds. | |
| 52 static int64 Uptime(); | |
| 53 | |
| 54 // Returns a descriptive string for the current machine model or an empty | |
| 55 // string if the machine model is unknown or an error occured. | |
| 56 // e.g. "MacPro1,1" on Mac, or "Nexus 5" on Android. Only implemented on OS X, | |
| 57 // Android, and Chrome OS. This returns an empty string on other platforms. | |
| 58 static std::string HardwareModelName(); | |
| 59 | |
| 60 // Returns the name of the host operating system. | |
| 61 static std::string OperatingSystemName(); | |
| 62 | |
| 63 // Returns the version of the host operating system. | |
| 64 static std::string OperatingSystemVersion(); | |
| 65 | |
| 66 // Retrieves detailed numeric values for the OS version. | |
| 67 // TODO(port): Implement a Linux version of this method and enable the | |
| 68 // corresponding unit test. | |
| 69 // DON'T USE THIS ON THE MAC OR WINDOWS to determine the current OS release | |
| 70 // for OS version-specific feature checks and workarounds. If you must use | |
| 71 // an OS version check instead of a feature check, use the base::mac::IsOS* | |
| 72 // family from base/mac/mac_util.h, or base::win::GetVersion from | |
| 73 // base/win/windows_version.h. | |
| 74 static void OperatingSystemVersionNumbers(int32* major_version, | |
| 75 int32* minor_version, | |
| 76 int32* bugfix_version); | |
| 77 | |
| 78 // Returns the architecture of the running operating system. | |
| 79 // Exact return value may differ across platforms. | |
| 80 // e.g. a 32-bit x86 kernel on a 64-bit capable CPU will return "x86", | |
| 81 // whereas a x86-64 kernel on the same CPU will return "x86_64" | |
| 82 static std::string OperatingSystemArchitecture(); | |
| 83 | |
| 84 // Avoid using this. Use base/cpu.h to get information about the CPU instead. | |
| 85 // http://crbug.com/148884 | |
| 86 // Returns the CPU model name of the system. If it can not be figured out, | |
| 87 // an empty string is returned. | |
| 88 static std::string CPUModelName(); | |
| 89 | |
| 90 // Return the smallest amount of memory (in bytes) which the VM system will | |
| 91 // allocate. | |
| 92 static size_t VMAllocationGranularity(); | |
| 93 | |
| 94 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
| 95 // Returns the maximum SysV shared memory segment size, or zero if there is no | |
| 96 // limit. | |
| 97 static uint64 MaxSharedMemorySize(); | |
| 98 #endif // defined(OS_POSIX) && !defined(OS_MACOSX) | |
| 99 | |
| 100 #if defined(OS_CHROMEOS) | |
| 101 typedef std::map<std::string, std::string> LsbReleaseMap; | |
| 102 | |
| 103 // Returns the contents of /etc/lsb-release as a map. | |
| 104 static const LsbReleaseMap& GetLsbReleaseMap(); | |
| 105 | |
| 106 // If |key| is present in the LsbReleaseMap, sets |value| and returns true. | |
| 107 static bool GetLsbReleaseValue(const std::string& key, std::string* value); | |
| 108 | |
| 109 // Convenience function for GetLsbReleaseValue("CHROMEOS_RELEASE_BOARD",...). | |
| 110 // Returns "unknown" if CHROMEOS_RELEASE_BOARD is not set. | |
| 111 static std::string GetLsbReleaseBoard(); | |
| 112 | |
| 113 // Returns the creation time of /etc/lsb-release. (Used to get the date and | |
| 114 // time of the Chrome OS build). | |
| 115 static Time GetLsbReleaseTime(); | |
| 116 | |
| 117 // Returns true when actually running in a Chrome OS environment. | |
| 118 static bool IsRunningOnChromeOS(); | |
| 119 | |
| 120 // Test method to force re-parsing of lsb-release. | |
| 121 static void SetChromeOSVersionInfoForTest(const std::string& lsb_release, | |
| 122 const Time& lsb_release_time); | |
| 123 #endif // defined(OS_CHROMEOS) | |
| 124 | |
| 125 #if defined(OS_ANDROID) | |
| 126 // Returns the Android build's codename. | |
| 127 static std::string GetAndroidBuildCodename(); | |
| 128 | |
| 129 // Returns the Android build ID. | |
| 130 static std::string GetAndroidBuildID(); | |
| 131 | |
| 132 static int DalvikHeapSizeMB(); | |
| 133 static int DalvikHeapGrowthLimitMB(); | |
| 134 #endif // defined(OS_ANDROID) | |
| 135 | |
| 136 // Returns true if this is a low-end device. | |
| 137 // Low-end device refers to devices having less than 512M memory in the | |
| 138 // current implementation. | |
| 139 static bool IsLowEndDevice(); | |
| 140 }; | |
| 141 | |
| 142 } // namespace base | |
| 143 | |
| 144 #endif // BASE_SYS_INFO_H_ | |
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