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// Copyright (c) 2011 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_
#pragma once
#include "base/base_export.h"
#include "base/basictypes.h"
#include <string>
class FilePath;
namespace base {
class BASE_EXPORT SysInfo {
public:
// Return the number of logical processors/cores on the current machine.
static int NumberOfProcessors();
// Return the number of bytes of physical memory on the current machine.
static int64 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 AmountOfFreeDiskSpace(const FilePath& path);
// Returns the name of the host operating system.
static std::string OperatingSystemName();
// Returns the version of the host operating system.
static std::string OperatingSystemVersion();
// Retrieves detailed numeric values for the OS version.
// TODO(port): Implement a Linux version of this method and enable the
// corresponding unit test.
// DON'T USE THIS ON THE MAC OR WINDOWS to determine the current OS release
// for OS version-specific feature checks and workarounds. If you must use
// an OS version check instead of a feature check, use the base::mac::IsOS*
// family from base/mac/mac_util.h, or base::win::GetVersion from
// base/win/windows_version.h.
static void OperatingSystemVersionNumbers(int32* major_version,
int32* minor_version,
int32* bugfix_version);
// Returns the CPU architecture of the system. Exact return value may differ
// across platforms.
static std::string CPUArchitecture();
// Return the smallest amount of memory (in bytes) which the VM system will
// allocate.
static size_t VMAllocationGranularity();
#if defined(OS_POSIX) && !defined(OS_MACOSX)
// Returns the maximum SysV shared memory segment size.
static size_t MaxSharedMemorySize();
#endif
#if defined(OS_CHROMEOS)
// Returns the name of the version entry we wish to look up in the
// Linux Standard Base release information file.
static std::string GetLinuxStandardBaseVersionKey();
// Parses /etc/lsb-release to get version information for Google Chrome OS.
// Declared here so it can be exposed for unit testing.
static void ParseLsbRelease(const std::string& lsb_release,
int32* major_version,
int32* minor_version,
int32* bugfix_version);
#endif
};
} // namespace base
#endif // BASE_SYS_INFO_H_
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