stream_registry.h revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
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_BROWSER_STREAMS_STREAM_REGISTRY_H_
6#define CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
7
8#include <map>
9
10#include "base/basictypes.h"
11#include "base/memory/ref_counted.h"
12#include "base/threading/non_thread_safe.h"
13#include "content/common/content_export.h"
14#include "url/gurl.h"
15
16namespace content {
17
18class Stream;
19
20// Maintains a mapping of blob: URLs to active streams.
21class CONTENT_EXPORT StreamRegistry : public base::NonThreadSafe {
22 public:
23  StreamRegistry();
24  virtual ~StreamRegistry();
25
26  // Registers a stream, and sets its URL.
27  void RegisterStream(scoped_refptr<Stream> stream);
28
29  // Clones a stream.  Returns true on success, or false if |src_url| doesn't
30  // exist.
31  bool CloneStream(const GURL& url, const GURL& src_url);
32
33  void UnregisterStream(const GURL& url);
34
35  // Gets the stream associated with |url|.  Returns NULL if there is no such
36  // stream.
37  scoped_refptr<Stream> GetStream(const GURL& url);
38
39 private:
40  typedef std::map<GURL, scoped_refptr<Stream> > StreamMap;
41
42  StreamMap streams_;
43
44  DISALLOW_COPY_AND_ASSIGN(StreamRegistry);
45};
46
47}  // namespace content
48
49#endif  // CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
50
51
52