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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SYS_INFO_H_
+#define BASE_SYS_INFO_H_
+
+#include "base/basictypes.h"
+
+#include <string>
+
+namespace base {
+
+class SysInfo {
+ public:
+ // Return the number of logical processors/cores on the current machine.
+ // WARNING: On POSIX, this method uses static variables and is not threadsafe
+ // until it's been initialized by being called once without a race.
+ static int NumberOfProcessors();
+
+ // Return the number of bytes of physical memory on the current machine.
+ static int64_t AmountOfPhysicalMemory();
+
+ // Return the number of megabytes of physical memory on the current machine.
+ static int AmountOfPhysicalMemoryMB() {
+ return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024);
+ }
+
+ // Return the available disk space in bytes on the volume containing |path|,
+ // or -1 on failure.
+ static int64_t AmountOfFreeDiskSpace(const std::wstring& path);
+
+ // Return true if the given environment variable is defined.
+ // TODO: find a better place for HasEnvVar.
+ static bool HasEnvVar(const wchar_t* var);
+
+ // Return the value of the given environment variable
+ // or an empty string if not defined.
+ // TODO: find a better place for GetEnvVar.
+ static std::wstring GetEnvVar(const wchar_t* var);
+
+ // Returns the name of the host operating system.
+ static std::string OperatingSystemName();
+
+ // Returns the CPU architecture of the system. Exact return value may differ
+ // across platforms.
+ static std::string CPUArchitecture();
+
+ // Returns the pixel dimensions of the primary display via the
+ // width and height parameters.
+ static void GetPrimaryDisplayDimensions(int* width, int* height);
+
+ // Return the number of displays.
+ static int DisplayCount();
+
+ // Return the smallest amount of memory (in bytes) which the VM system will
+ // allocate.
+ static size_t VMAllocationGranularity();
+};
+
+} // namespace base
+
+#endif // BASE_SYS_INFO_H_