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180 lines
6.8 KiB
180 lines
6.8 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_SYS_INFO_H_
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#define BASE_SYS_INFO_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <map>
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#include <string>
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#include "base/base_export.h"
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#include "base/files/file_path.h"
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#include "base/gtest_prod_util.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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namespace base {
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namespace debug {
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FORWARD_DECLARE_TEST(SystemMetricsTest, ParseMeminfo);
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}
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struct SystemMemoryInfoKB;
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class BASE_EXPORT SysInfo {
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public:
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// Return the number of logical processors/cores on the current machine.
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static int NumberOfProcessors();
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// Return the number of bytes of physical memory on the current machine.
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static int64_t AmountOfPhysicalMemory();
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// Return the number of bytes of current available physical memory on the
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// machine.
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// (The amount of memory that can be allocated without any significant
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// impact on the system. It can lead to freeing inactive file-backed
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// and/or speculative file-backed memory).
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static int64_t AmountOfAvailablePhysicalMemory();
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// Return the number of bytes of virtual memory of this process. A return
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// value of zero means that there is no limit on the available virtual
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// memory.
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static int64_t AmountOfVirtualMemory();
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// Return the number of megabytes of physical memory on the current machine.
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static int AmountOfPhysicalMemoryMB() {
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return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024);
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}
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// Return the number of megabytes of available virtual memory, or zero if it
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// is unlimited.
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static int AmountOfVirtualMemoryMB() {
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return static_cast<int>(AmountOfVirtualMemory() / 1024 / 1024);
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}
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// Return the available disk space in bytes on the volume containing |path|,
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// or -1 on failure.
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static int64_t AmountOfFreeDiskSpace(const FilePath& path);
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// Return the total disk space in bytes on the volume containing |path|, or -1
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// on failure.
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static int64_t AmountOfTotalDiskSpace(const FilePath& path);
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// Returns system uptime.
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static TimeDelta Uptime();
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// Returns a descriptive string for the current machine model or an empty
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// string if the machine model is unknown or an error occured.
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// e.g. "MacPro1,1" on Mac, "iPhone9,3" on iOS or "Nexus 5" on Android. Only
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// implemented on OS X, iOS, Android, and Chrome OS. This returns an empty
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// string on other platforms.
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static std::string HardwareModelName();
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// Returns the name of the host operating system.
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static std::string OperatingSystemName();
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// Returns the version of the host operating system.
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static std::string OperatingSystemVersion();
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// Retrieves detailed numeric values for the OS version.
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// DON'T USE THIS ON THE MAC OR WINDOWS to determine the current OS release
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// for OS version-specific feature checks and workarounds. If you must use
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// an OS version check instead of a feature check, use the base::mac::IsOS*
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// family from base/mac/mac_util.h, or base::win::GetVersion from
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// base/win/windows_version.h.
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static void OperatingSystemVersionNumbers(int32_t* major_version,
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int32_t* minor_version,
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int32_t* bugfix_version);
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// Returns the architecture of the running operating system.
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// Exact return value may differ across platforms.
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// e.g. a 32-bit x86 kernel on a 64-bit capable CPU will return "x86",
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// whereas a x86-64 kernel on the same CPU will return "x86_64"
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static std::string OperatingSystemArchitecture();
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// Avoid using this. Use base/cpu.h to get information about the CPU instead.
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// http://crbug.com/148884
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// Returns the CPU model name of the system. If it can not be figured out,
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// an empty string is returned.
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static std::string CPUModelName();
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// Return the smallest amount of memory (in bytes) which the VM system will
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// allocate.
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static size_t VMAllocationGranularity();
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#if defined(OS_CHROMEOS)
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typedef std::map<std::string, std::string> LsbReleaseMap;
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// Returns the contents of /etc/lsb-release as a map.
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static const LsbReleaseMap& GetLsbReleaseMap();
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// If |key| is present in the LsbReleaseMap, sets |value| and returns true.
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static bool GetLsbReleaseValue(const std::string& key, std::string* value);
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// Convenience function for GetLsbReleaseValue("CHROMEOS_RELEASE_BOARD",...).
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// Returns "unknown" if CHROMEOS_RELEASE_BOARD is not set. Otherwise, returns
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// the full name of the board. Note that the returned value often differs
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// between developers' systems and devices that use official builds. E.g. for
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// a developer-built image, the function could return 'glimmer', while in an
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// official build, it may be something like 'glimmer-signed-mp-v4keys'.
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//
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// NOTE: Strings returned by this function should be treated as opaque values
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// within Chrome (e.g. for reporting metrics elsewhere). If you need to make
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// Chrome behave differently for different Chrome OS devices, either directly
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// check for the hardware feature that you care about (preferred) or add a
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// command-line flag to Chrome and pass it from session_manager (based on
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// whether a USE flag is set or not). See https://goo.gl/BbBkzg for more
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// details.
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static std::string GetLsbReleaseBoard();
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// Returns the creation time of /etc/lsb-release. (Used to get the date and
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// time of the Chrome OS build).
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static Time GetLsbReleaseTime();
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// Returns true when actually running in a Chrome OS environment.
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static bool IsRunningOnChromeOS();
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// Test method to force re-parsing of lsb-release.
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static void SetChromeOSVersionInfoForTest(const std::string& lsb_release,
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const Time& lsb_release_time);
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#endif // defined(OS_CHROMEOS)
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#if defined(OS_ANDROID)
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// Returns the Android build's codename.
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static std::string GetAndroidBuildCodename();
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// Returns the Android build ID.
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static std::string GetAndroidBuildID();
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static int DalvikHeapSizeMB();
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static int DalvikHeapGrowthLimitMB();
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#endif // defined(OS_ANDROID)
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// Returns true if this is a low-end device.
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// Low-end device refers to devices having a very low amount of total
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// system memory, typically <= 1GB.
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// See also SysUtils.java, method isLowEndDevice.
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static bool IsLowEndDevice();
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private:
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FRIEND_TEST_ALL_PREFIXES(SysInfoTest, AmountOfAvailablePhysicalMemory);
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FRIEND_TEST_ALL_PREFIXES(debug::SystemMetricsTest, ParseMeminfo);
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static int64_t AmountOfPhysicalMemoryImpl();
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static int64_t AmountOfAvailablePhysicalMemoryImpl();
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static bool IsLowEndDeviceImpl();
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#if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_AIX)
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static int64_t AmountOfAvailablePhysicalMemory(
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const SystemMemoryInfoKB& meminfo);
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#endif
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};
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} // namespace base
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#endif // BASE_SYS_INFO_H_
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