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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/safe_browsing/incident_reporting/delayed_callback_runner.h"
#include "base/location.h"
namespace safe_browsing {
DelayedCallbackRunner::DelayedCallbackRunner(
base::TimeDelta delay,
const scoped_refptr<base::TaskRunner>& task_runner)
: task_runner_(task_runner),
next_callback_(callbacks_.end()),
timer_(FROM_HERE, delay, this, &DelayedCallbackRunner::OnTimer) {
}
DelayedCallbackRunner::~DelayedCallbackRunner() {
}
void DelayedCallbackRunner::RegisterCallback(const base::Closure& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
callbacks_.push_back(callback);
}
void DelayedCallbackRunner::Start() {
DCHECK(thread_checker_.CalledOnValidThread());
// Nothing to do if the runner is already running or nothing has been added.
if (next_callback_ != callbacks_.end() || callbacks_.empty())
return;
// Prime the system with the first callback.
next_callback_ = callbacks_.begin();
// Point the starter pistol in the air and pull the trigger.
timer_.Reset();
}
void DelayedCallbackRunner::OnTimer() {
// Run the next callback on the task runner.
task_runner_->PostTask(FROM_HERE, *next_callback_);
// Remove this callback and get ready for the next if there is one.
next_callback_ = callbacks_.erase(next_callback_);
if (next_callback_ != callbacks_.end())
timer_.Reset();
}
} // namespace safe_browsing
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