michael@0: // Copyright (c) 2008 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #ifndef BASE_SYS_INFO_H_
michael@0: #define BASE_SYS_INFO_H_
michael@0: 
michael@0: #include "base/basictypes.h"
michael@0: 
michael@0: #include <string>
michael@0: 
michael@0: namespace base {
michael@0: 
michael@0: class SysInfo {
michael@0:  public:
michael@0:   // Return the number of logical processors/cores on the current machine.
michael@0:   // WARNING: On POSIX, this method uses static variables and is not threadsafe
michael@0:   // until it's been initialized by being called once without a race.
michael@0:   static int NumberOfProcessors();
michael@0: 
michael@0:   // Return the number of bytes of physical memory on the current machine.
michael@0:   static int64_t AmountOfPhysicalMemory();
michael@0: 
michael@0:   // Return the number of megabytes of physical memory on the current machine.
michael@0:   static int AmountOfPhysicalMemoryMB() {
michael@0:     return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024);
michael@0:   }
michael@0: 
michael@0:   // Return the available disk space in bytes on the volume containing |path|,
michael@0:   // or -1 on failure.
michael@0:   static int64_t AmountOfFreeDiskSpace(const std::wstring& path);
michael@0: 
michael@0:   // Return true if the given environment variable is defined.
michael@0:   // TODO: find a better place for HasEnvVar.
michael@0:   static bool HasEnvVar(const wchar_t* var);
michael@0: 
michael@0:   // Return the value of the given environment variable
michael@0:   // or an empty string if not defined.
michael@0:   // TODO: find a better place for GetEnvVar.
michael@0:   static std::wstring GetEnvVar(const wchar_t* var);
michael@0: 
michael@0:   // Returns the name of the host operating system.
michael@0:   static std::string OperatingSystemName();
michael@0: 
michael@0:   // Returns the version of the host operating system.
michael@0:   static std::string OperatingSystemVersion();
michael@0: 
michael@0:   // Retrieves detailed numeric values for the OS version.
michael@0:   // WARNING: On OS X, this method uses static variables and is not threadsafe
michael@0:   // until it's been initialized by being called once without a race.
michael@0:   // TODO(port): Implement a Linux version of this method and enable the
michael@0:   // corresponding unit test.
michael@0:   static void OperatingSystemVersionNumbers(int32_t *major_version,
michael@0:                                             int32_t *minor_version,
michael@0:                                             int32_t *bugfix_version);
michael@0: 
michael@0:   // Returns the CPU architecture of the system. Exact return value may differ
michael@0:   // across platforms.
michael@0:   static std::string CPUArchitecture();
michael@0: 
michael@0:   // Returns the pixel dimensions of the primary display via the
michael@0:   // width and height parameters.
michael@0:   static void GetPrimaryDisplayDimensions(int* width, int* height);
michael@0: 
michael@0:   // Return the number of displays.
michael@0:   static int DisplayCount();
michael@0: 
michael@0:   // Return the smallest amount of memory (in bytes) which the VM system will
michael@0:   // allocate.
michael@0:   static size_t VMAllocationGranularity();
michael@0: 
michael@0: #if defined(OS_MACOSX)
michael@0:   // Under the OS X Sandbox, our access to the system is limited, this call
michael@0:   // caches the system info on startup before we turn the Sandbox on.
michael@0:   // The above functions are all wired up to return the cached value so the rest
michael@0:   // of the code can call them in the Sandbox without worrying.
michael@0:   static void CacheSysInfo();
michael@0: #endif
michael@0: };
michael@0: 
michael@0: }  // namespace base
michael@0: 
michael@0: #endif  // BASE_SYS_INFO_H_