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comparison: ipc/chromium/src/base/sys_info.h
ipc/chromium/src/base/sys_info.h
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| 1 // Copyright (c) 2008 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 "base/basictypes.h" | |
| 9 | |
| 10 #include <string> | |
| 11 | |
| 12 namespace base { | |
| 13 | |
| 14 class SysInfo { | |
| 15 public: | |
| 16 // Return the number of logical processors/cores on the current machine. | |
| 17 // WARNING: On POSIX, this method uses static variables and is not threadsafe | |
| 18 // until it's been initialized by being called once without a race. | |
| 19 static int NumberOfProcessors(); | |
| 20 | |
| 21 // Return the number of bytes of physical memory on the current machine. | |
| 22 static int64_t AmountOfPhysicalMemory(); | |
| 23 | |
| 24 // Return the number of megabytes of physical memory on the current machine. | |
| 25 static int AmountOfPhysicalMemoryMB() { | |
| 26 return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024); | |
| 27 } | |
| 28 | |
| 29 // Return the available disk space in bytes on the volume containing |path|, | |
| 30 // or -1 on failure. | |
| 31 static int64_t AmountOfFreeDiskSpace(const std::wstring& path); | |
| 32 | |
| 33 // Return true if the given environment variable is defined. | |
| 34 // TODO: find a better place for HasEnvVar. | |
| 35 static bool HasEnvVar(const wchar_t* var); | |
| 36 | |
| 37 // Return the value of the given environment variable | |
| 38 // or an empty string if not defined. | |
| 39 // TODO: find a better place for GetEnvVar. | |
| 40 static std::wstring GetEnvVar(const wchar_t* var); | |
| 41 | |
| 42 // Returns the name of the host operating system. | |
| 43 static std::string OperatingSystemName(); | |
| 44 | |
| 45 // Returns the version of the host operating system. | |
| 46 static std::string OperatingSystemVersion(); | |
| 47 | |
| 48 // Retrieves detailed numeric values for the OS version. | |
| 49 // WARNING: On OS X, this method uses static variables and is not threadsafe | |
| 50 // until it's been initialized by being called once without a race. | |
| 51 // TODO(port): Implement a Linux version of this method and enable the | |
| 52 // corresponding unit test. | |
| 53 static void OperatingSystemVersionNumbers(int32_t *major_version, | |
| 54 int32_t *minor_version, | |
| 55 int32_t *bugfix_version); | |
| 56 | |
| 57 // Returns the CPU architecture of the system. Exact return value may differ | |
| 58 // across platforms. | |
| 59 static std::string CPUArchitecture(); | |
| 60 | |
| 61 // Returns the pixel dimensions of the primary display via the | |
| 62 // width and height parameters. | |
| 63 static void GetPrimaryDisplayDimensions(int* width, int* height); | |
| 64 | |
| 65 // Return the number of displays. | |
| 66 static int DisplayCount(); | |
| 67 | |
| 68 // Return the smallest amount of memory (in bytes) which the VM system will | |
| 69 // allocate. | |
| 70 static size_t VMAllocationGranularity(); | |
| 71 | |
| 72 #if defined(OS_MACOSX) | |
| 73 // Under the OS X Sandbox, our access to the system is limited, this call | |
| 74 // caches the system info on startup before we turn the Sandbox on. | |
| 75 // The above functions are all wired up to return the cached value so the rest | |
| 76 // of the code can call them in the Sandbox without worrying. | |
| 77 static void CacheSysInfo(); | |
| 78 #endif | |
| 79 }; | |
| 80 | |
| 81 } // namespace base | |
| 82 | |
| 83 #endif // BASE_SYS_INFO_H_ |
