blob: 9fd51c3e62d2aa30c5fa9c4b18b5673fca784671 [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_QUOTA_QUOTA_TASK_H_
#define STORAGE_BROWSER_QUOTA_QUOTA_TASK_H_
#include <set>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/sequenced_task_runner_helpers.h"
#include "storage/browser/storage_browser_export.h"
namespace base {
class SingleThreadTaskRunner;
class TaskRunner;
}
namespace storage {
class QuotaTaskObserver;
// A base class for quota tasks.
// TODO(kinuko): Revise this using base::Callback.
class QuotaTask {
public:
void Start();
protected:
explicit QuotaTask(QuotaTaskObserver* observer);
virtual ~QuotaTask();
// The task body.
virtual void Run() = 0;
// Called upon completion, on the original message loop.
virtual void Completed() = 0;
// Called when the task is aborted.
virtual void Aborted() {}
void CallCompleted();
// Call this to delete itself.
void DeleteSoon();
QuotaTaskObserver* observer() const { return observer_; }
base::SingleThreadTaskRunner* original_task_runner() const {
return original_task_runner_.get();
}
private:
friend class base::DeleteHelper<QuotaTask>;
friend class QuotaTaskObserver;
void Abort();
QuotaTaskObserver* observer_;
scoped_refptr<base::SingleThreadTaskRunner> original_task_runner_;
bool delete_scheduled_;
};
class STORAGE_EXPORT QuotaTaskObserver {
protected:
friend class QuotaTask;
QuotaTaskObserver();
virtual ~QuotaTaskObserver();
void RegisterTask(QuotaTask* task);
void UnregisterTask(QuotaTask* task);
typedef std::set<QuotaTask*> TaskSet;
TaskSet running_quota_tasks_;
};
}
#endif // STORAGE_BROWSER_QUOTA_QUOTA_TASK_H_