jeremy@chromium.org | de658ed | 2012-10-29 10:04:09 +0900 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "base/sys_info.h" |
| 6 | |
c.shu@samsung.com | da21aff | 2014-06-27 01:55:27 +0900 | [diff] [blame] | 7 | #include "base/base_switches.h" |
| 8 | #include "base/command_line.h" |
| 9 | #include "base/lazy_instance.h" |
| 10 | #include "base/strings/string_number_conversions.h" |
| 11 | #include "base/sys_info_internal.h" |
avi@chromium.org | b45ec93 | 2013-06-29 00:14:18 +0900 | [diff] [blame] | 12 | #include "base/time/time.h" |
jeremy@chromium.org | de658ed | 2012-10-29 10:04:09 +0900 | [diff] [blame] | 13 | |
| 14 | namespace base { |
| 15 | |
c.shu@samsung.com | da21aff | 2014-06-27 01:55:27 +0900 | [diff] [blame] | 16 | #if !defined(OS_ANDROID) |
| 17 | |
| 18 | static const int kLowMemoryDeviceThresholdMB = 512; |
| 19 | |
| 20 | bool DetectLowEndDevice() { |
| 21 | CommandLine* command_line = CommandLine::ForCurrentProcess(); |
| 22 | int int_value = 0; |
| 23 | if (command_line->HasSwitch(switches::kLowEndDeviceMode)) { |
| 24 | std::string string_value = |
| 25 | command_line->GetSwitchValueASCII(switches::kLowEndDeviceMode); |
| 26 | StringToInt(string_value, &int_value); |
| 27 | } |
| 28 | if (int_value == 1) |
| 29 | return true; |
| 30 | if (int_value != 2) |
| 31 | return false; |
| 32 | |
| 33 | int ram_size_mb = SysInfo::AmountOfPhysicalMemoryMB(); |
| 34 | return (ram_size_mb > 0 && ram_size_mb < kLowMemoryDeviceThresholdMB); |
| 35 | } |
| 36 | |
| 37 | static LazyInstance< |
| 38 | internal::LazySysInfoValue<bool, DetectLowEndDevice> >::Leaky |
| 39 | g_lazy_low_end_device = LAZY_INSTANCE_INITIALIZER; |
| 40 | |
| 41 | // static |
| 42 | bool SysInfo::IsLowEndDevice() { |
| 43 | return g_lazy_low_end_device.Get().value(); |
| 44 | } |
| 45 | #endif |
| 46 | |
jeremy@chromium.org | de658ed | 2012-10-29 10:04:09 +0900 | [diff] [blame] | 47 | // static |
| 48 | int64 SysInfo::Uptime() { |
| 49 | // This code relies on an implementation detail of TimeTicks::Now() - that |
| 50 | // its return value happens to coincide with the system uptime value in |
| 51 | // microseconds, on Win/Mac/iOS/Linux/ChromeOS and Android. |
| 52 | int64 uptime_in_microseconds = TimeTicks::Now().ToInternalValue(); |
| 53 | return uptime_in_microseconds / 1000; |
| 54 | } |
| 55 | |
| 56 | } // namespace base |