blob: 4663501b4ff0f497657cf9d359830ccb68ae829d [file] [log] [blame]
// Copyright 2013 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.
#ifndef STORAGE_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_
#define STORAGE_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "storage/browser/storage_browser_export.h"
namespace base {
class SequencedTaskRunner;
}
namespace storage {
// Works similarly as base::Timer, but takes SequencedTaskRunner and
// runs tasks on it (instead of implicitly bound to a thread).
// TODO(kinuko): This has nothing to do with fileapi. Move somewhere
// more common place.
class STORAGE_EXPORT TimedTaskHelper {
public:
explicit TimedTaskHelper(base::SequencedTaskRunner* task_runner);
~TimedTaskHelper();
bool IsRunning() const;
void Start(const tracked_objects::Location& posted_from,
base::TimeDelta delay,
const base::Closure& user_task);
void Reset();
private:
struct Tracker;
static void Fired(scoped_ptr<Tracker> tracker);
void OnFired(scoped_ptr<Tracker> tracker);
void PostDelayedTask(scoped_ptr<Tracker> tracker, base::TimeDelta delay);
scoped_refptr<base::SequencedTaskRunner> task_runner_;
tracked_objects::Location posted_from_;
base::TimeDelta delay_;
base::Closure user_task_;
base::TimeTicks desired_run_time_;
// This is set to non-null and owned by a timer task while timer is running.
Tracker* tracker_;
DISALLOW_COPY_AND_ASSIGN(TimedTaskHelper);
};
} // namespace storage
#endif // STORAGE_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_