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 7 #include "base/time/time.h" 8 9 namespace base { 10 11 // static Uptime()12int64 SysInfo::Uptime() { 13 // This code relies on an implementation detail of TimeTicks::Now() - that 14 // its return value happens to coincide with the system uptime value in 15 // microseconds, on Win/Mac/iOS/Linux/ChromeOS and Android. 16 int64 uptime_in_microseconds = TimeTicks::Now().ToInternalValue(); 17 return uptime_in_microseconds / 1000; 18 } 19 20 } // namespace base 21