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 <stddef.h> 9 #include <stdint.h> 10 11 #include <map> 12 #include <string> 13 14 #include "base/base_export.h" 15 #include "base/files/file_path.h" 16 #include "base/time/time.h" 17 #include "build/build_config.h" 18 19 namespace base { 20 21 class BASE_EXPORT SysInfo { 22 public: 23 // Return the number of logical processors/cores on the current machine. 24 static int NumberOfProcessors(); 25 26 // Return the number of bytes of physical memory on the current machine. 27 static int64_t AmountOfPhysicalMemory(); 28 29 // Return the number of bytes of current available physical memory on the 30 // machine. 31 static int64_t AmountOfAvailablePhysicalMemory(); 32 33 // Return the number of bytes of virtual memory of this process. A return 34 // value of zero means that there is no limit on the available virtual 35 // memory. 36 static int64_t AmountOfVirtualMemory(); 37 38 // Return the number of megabytes of physical memory on the current machine. AmountOfPhysicalMemoryMB()39 static int AmountOfPhysicalMemoryMB() { 40 return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024); 41 } 42 43 // Return the number of megabytes of available virtual memory, or zero if it 44 // is unlimited. AmountOfVirtualMemoryMB()45 static int AmountOfVirtualMemoryMB() { 46 return static_cast<int>(AmountOfVirtualMemory() / 1024 / 1024); 47 } 48 49 // Return the available disk space in bytes on the volume containing |path|, 50 // or -1 on failure. 51 static int64_t AmountOfFreeDiskSpace(const FilePath& path); 52 53 // Returns system uptime. 54 static TimeDelta Uptime(); 55 56 // Returns a descriptive string for the current machine model or an empty 57 // string if the machine model is unknown or an error occured. 58 // e.g. "MacPro1,1" on Mac, or "Nexus 5" on Android. Only implemented on OS X, 59 // Android, and Chrome OS. This returns an empty string on other platforms. 60 static std::string HardwareModelName(); 61 62 // Returns the name of the host operating system. 63 static std::string OperatingSystemName(); 64 65 // Returns the version of the host operating system. 66 static std::string OperatingSystemVersion(); 67 68 // Retrieves detailed numeric values for the OS version. 69 // TODO(port): Implement a Linux version of this method and enable the 70 // corresponding unit test. 71 // DON'T USE THIS ON THE MAC OR WINDOWS to determine the current OS release 72 // for OS version-specific feature checks and workarounds. If you must use 73 // an OS version check instead of a feature check, use the base::mac::IsOS* 74 // family from base/mac/mac_util.h, or base::win::GetVersion from 75 // base/win/windows_version.h. 76 static void OperatingSystemVersionNumbers(int32_t* major_version, 77 int32_t* minor_version, 78 int32_t* bugfix_version); 79 80 // Returns the architecture of the running operating system. 81 // Exact return value may differ across platforms. 82 // e.g. a 32-bit x86 kernel on a 64-bit capable CPU will return "x86", 83 // whereas a x86-64 kernel on the same CPU will return "x86_64" 84 static std::string OperatingSystemArchitecture(); 85 86 // Avoid using this. Use base/cpu.h to get information about the CPU instead. 87 // http://crbug.com/148884 88 // Returns the CPU model name of the system. If it can not be figured out, 89 // an empty string is returned. 90 static std::string CPUModelName(); 91 92 // Return the smallest amount of memory (in bytes) which the VM system will 93 // allocate. 94 static size_t VMAllocationGranularity(); 95 96 #if defined(OS_POSIX) && !defined(OS_MACOSX) 97 // Returns the maximum SysV shared memory segment size, or zero if there is no 98 // limit. 99 static uint64_t MaxSharedMemorySize(); 100 #endif // defined(OS_POSIX) && !defined(OS_MACOSX) 101 102 #if defined(OS_CHROMEOS) 103 typedef std::map<std::string, std::string> LsbReleaseMap; 104 105 // Returns the contents of /etc/lsb-release as a map. 106 static const LsbReleaseMap& GetLsbReleaseMap(); 107 108 // If |key| is present in the LsbReleaseMap, sets |value| and returns true. 109 static bool GetLsbReleaseValue(const std::string& key, std::string* value); 110 111 // Convenience function for GetLsbReleaseValue("CHROMEOS_RELEASE_BOARD",...). 112 // Returns "unknown" if CHROMEOS_RELEASE_BOARD is not set. 113 static std::string GetLsbReleaseBoard(); 114 115 // Returns the creation time of /etc/lsb-release. (Used to get the date and 116 // time of the Chrome OS build). 117 static Time GetLsbReleaseTime(); 118 119 // Returns true when actually running in a Chrome OS environment. 120 static bool IsRunningOnChromeOS(); 121 122 // Test method to force re-parsing of lsb-release. 123 static void SetChromeOSVersionInfoForTest(const std::string& lsb_release, 124 const Time& lsb_release_time); 125 #endif // defined(OS_CHROMEOS) 126 127 #if defined(OS_ANDROID) 128 // Returns the Android build's codename. 129 static std::string GetAndroidBuildCodename(); 130 131 // Returns the Android build ID. 132 static std::string GetAndroidBuildID(); 133 134 static int DalvikHeapSizeMB(); 135 static int DalvikHeapGrowthLimitMB(); 136 #endif // defined(OS_ANDROID) 137 138 // Returns true if this is a low-end device. 139 // Low-end device refers to devices having less than 512M memory in the 140 // current implementation. 141 static bool IsLowEndDevice(); 142 }; 143 144 } // namespace base 145 146 #endif // BASE_SYS_INFO_H_ 147