1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef WEBKIT_BROWSER_QUOTA_QUOTA_TASK_H_
6 #define WEBKIT_BROWSER_QUOTA_QUOTA_TASK_H_
10 #include "base/basictypes.h"
11 #include "base/compiler_specific.h"
12 #include "base/memory/ref_counted.h"
13 #include "base/sequenced_task_runner_helpers.h"
14 #include "webkit/browser/webkit_storage_browser_export.h"
17 class SingleThreadTaskRunner;
23 class QuotaTaskObserver;
25 // A base class for quota tasks.
26 // TODO(kinuko): Revise this using base::Callback.
32 explicit QuotaTask(QuotaTaskObserver* observer);
36 virtual void Run() = 0;
38 // Called upon completion, on the original message loop.
39 virtual void Completed() = 0;
41 // Called when the task is aborted.
42 virtual void Aborted() {}
46 // Call this to delete itself.
49 QuotaTaskObserver* observer() const { return observer_; }
50 base::SingleThreadTaskRunner* original_task_runner() const {
51 return original_task_runner_.get();
55 friend class base::DeleteHelper<QuotaTask>;
56 friend class QuotaTaskObserver;
59 QuotaTaskObserver* observer_;
60 scoped_refptr<base::SingleThreadTaskRunner> original_task_runner_;
61 bool delete_scheduled_;
64 class WEBKIT_STORAGE_BROWSER_EXPORT QuotaTaskObserver {
66 friend class QuotaTask;
69 virtual ~QuotaTaskObserver();
71 void RegisterTask(QuotaTask* task);
72 void UnregisterTask(QuotaTask* task);
74 typedef std::set<QuotaTask*> TaskSet;
75 TaskSet running_quota_tasks_;
79 #endif // WEBKIT_BROWSER_QUOTA_QUOTA_TASK_H_