15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/sys_info.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/time/time.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int64 SysInfo::Uptime() { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This code relies on an implementation detail of TimeTicks::Now() - that 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // its return value happens to coincide with the system uptime value in 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // microseconds, on Win/Mac/iOS/Linux/ChromeOS and Android. 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int64 uptime_in_microseconds = TimeTicks::Now().ToInternalValue(); 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return uptime_in_microseconds / 1000; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 21