1a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 2a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// found in the LICENSE file. 4a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 5a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#include "content/browser/renderer_host/input/timeout_monitor.h" 6a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 7a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)using base::Time; 8a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)using base::TimeDelta; 9a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 10a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)namespace content { 11a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 12a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)TimeoutMonitor::TimeoutMonitor(const TimeoutHandler& timeout_handler) 13a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) : timeout_handler_(timeout_handler) { 14a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) DCHECK(!timeout_handler_.is_null()); 15a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 16a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 17a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)TimeoutMonitor::~TimeoutMonitor() {} 18a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 19a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)void TimeoutMonitor::Start(TimeDelta delay) { 20a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // Set time_when_considered_timed_out_ if it's null. Also, update 21a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // time_when_considered_timed_out_ if the caller's request is sooner than the 22a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // existing one. This will have the side effect that the existing timeout will 23a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // be forgotten. 24a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) Time requested_end_time = Time::Now() + delay; 25a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (time_when_considered_timed_out_.is_null() || 26a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) time_when_considered_timed_out_ > requested_end_time) 27a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) time_when_considered_timed_out_ = requested_end_time; 28a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 29a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // If we already have a timer with the same or shorter duration, then we can 30a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // wait for it to finish. 31a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (timeout_timer_.IsRunning() && timeout_timer_.GetCurrentDelay() <= delay) { 32a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // If time_when_considered_timed_out_ was null, this timer may fire early. 33a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // CheckTimedOut handles that that by calling Start with the remaining time. 34a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // If time_when_considered_timed_out_ was non-null, it means we still 35a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // haven't been stopped, so we leave time_when_considered_timed_out_ as is. 36a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return; 37a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 38a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 39a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // Either the timer is not yet running, or we need to adjust the timer to 40a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // fire sooner. 41a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) time_when_considered_timed_out_ = requested_end_time; 42a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) timeout_timer_.Stop(); 43a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) timeout_timer_.Start(FROM_HERE, delay, this, &TimeoutMonitor::CheckTimedOut); 44a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 45a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 46a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)void TimeoutMonitor::Restart(TimeDelta delay) { 47a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // Setting to null will cause StartTimeoutMonitor to restart the timer. 48a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) time_when_considered_timed_out_ = Time(); 49a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) Start(delay); 50a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 51a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 52a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)void TimeoutMonitor::Stop() { 53a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // We do not bother to stop the timeout_timer_ here in case it will be 54a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // started again shortly, which happens to be the common use case. 55a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) time_when_considered_timed_out_ = Time(); 56a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 57a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 58a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)void TimeoutMonitor::CheckTimedOut() { 59a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // If we received a call to |Stop()|. 60a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (time_when_considered_timed_out_.is_null()) 61a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return; 62a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 63a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // If we have not waited long enough, then wait some more. 64a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) Time now = Time::Now(); 65a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (now < time_when_considered_timed_out_) { 66a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) Start(time_when_considered_timed_out_ - now); 67a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return; 68a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 69a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 70a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) timeout_handler_.Run(); 71a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 72a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 73a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)bool TimeoutMonitor::IsRunning() const { 74a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return timeout_timer_.IsRunning() && 75a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) !time_when_considered_timed_out_.is_null(); 76a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 77a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 78a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} // namespace content 79