1 // Copyright (c) 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.
4 
5 #ifndef CONTENT_CHILD_THREAD_SAFE_SENDER_H_
6 #define CONTENT_CHILD_THREAD_SAFE_SENDER_H_
7 
8 #include "base/macros.h"
9 #include "base/memory/ref_counted.h"
10 #include "content/common/content_export.h"
11 #include "ipc/ipc_sender.h"
12 
13 namespace base {
14 class SingleThreadTaskRunner;
15 }
16 
17 namespace IPC {
18 class SyncMessageFilter;
19 }
20 
21 namespace content {
22 class ChildThreadImpl;
23 
24 // The class of Sender returned by ChildThreadImpl::thread_safe_sender().
25 class CONTENT_EXPORT ThreadSafeSender
26     : public IPC::Sender,
27       public base::RefCountedThreadSafe<ThreadSafeSender> {
28  public:
29   bool Send(IPC::Message* msg) override;
30 
31  protected:
32   ThreadSafeSender(
33       const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner,
34       const scoped_refptr<IPC::SyncMessageFilter>& sync_filter);
35   ~ThreadSafeSender() override;
36 
37  private:
38   friend class ChildThreadImpl;  // for construction
39   friend class IndexedDBDispatcherTest;
40   friend class WebIDBCursorImplTest;
41   friend class base::RefCountedThreadSafe<ThreadSafeSender>;
42 
43   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
44   scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
45 
46   DISALLOW_COPY_AND_ASSIGN(ThreadSafeSender);
47 };
48 
49 }  // namespace content
50 
51 #endif  // CONTENT_CHILD_THREAD_SAFE_SENDER_H_
52