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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_
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