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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "base/sys_info.h" | 5 #include "base/sys_info.h" |
| 6 | 6 |
| 7 #include "base/base_switches.h" | 7 #include "base/base_switches.h" |
| 8 #include "base/command_line.h" | 8 #include "base/command_line.h" |
| 9 #include "base/lazy_instance.h" | 9 #include "base/lazy_instance.h" |
| 10 #include "base/metrics/field_trial.h" | 10 #include "base/metrics/field_trial.h" |
| 11 #include "base/strings/string_number_conversions.h" | 11 #include "base/strings/string_number_conversions.h" |
| 12 #include "base/strings/string_util.h" | 12 #include "base/strings/string_util.h" |
| 13 #include "base/sys_info_internal.h" | 13 #include "base/sys_info_internal.h" |
| 14 #include "base/time/time.h" | 14 #include "base/time/time.h" |
| 15 #include "build/build_config.h" |
| 15 | 16 |
| 16 namespace base { | 17 namespace base { |
| 17 | 18 |
| 18 #if !defined(OS_ANDROID) | 19 #if !defined(OS_ANDROID) |
| 19 | 20 |
| 20 static const int kLowMemoryDeviceThresholdMB = 512; | 21 static const int kLowMemoryDeviceThresholdMB = 512; |
| 21 | 22 |
| 22 bool DetectLowEndDevice() { | 23 bool DetectLowEndDevice() { |
| 23 CommandLine* command_line = CommandLine::ForCurrentProcess(); | 24 CommandLine* command_line = CommandLine::ForCurrentProcess(); |
| 24 if (command_line->HasSwitch(switches::kEnableLowEndDeviceMode)) | 25 if (command_line->HasSwitch(switches::kEnableLowEndDeviceMode)) |
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| 57 // static | 58 // static |
| 58 base::TimeDelta SysInfo::Uptime() { | 59 base::TimeDelta SysInfo::Uptime() { |
| 59 // This code relies on an implementation detail of TimeTicks::Now() - that | 60 // This code relies on an implementation detail of TimeTicks::Now() - that |
| 60 // its return value happens to coincide with the system uptime value in | 61 // its return value happens to coincide with the system uptime value in |
| 61 // microseconds, on Win/Mac/iOS/Linux/ChromeOS and Android. | 62 // microseconds, on Win/Mac/iOS/Linux/ChromeOS and Android. |
| 62 int64_t uptime_in_microseconds = TimeTicks::Now().ToInternalValue(); | 63 int64_t uptime_in_microseconds = TimeTicks::Now().ToInternalValue(); |
| 63 return base::TimeDelta::FromMicroseconds(uptime_in_microseconds); | 64 return base::TimeDelta::FromMicroseconds(uptime_in_microseconds); |
| 64 } | 65 } |
| 65 | 66 |
| 66 } // namespace base | 67 } // namespace base |
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