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1 // Copyright 2014 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 MOJO_SERVICES_PUBLIC_CPP_NETWORK_WEB_SOCKET_READ_QUEUE_H_ | |
6 #define MOJO_SERVICES_PUBLIC_CPP_NETWORK_WEB_SOCKET_READ_QUEUE_H_ | |
7 | |
8 #include "base/callback.h" | |
9 #include "base/memory/scoped_vector.h" | |
10 #include "mojo/common/handle_watcher.h" | |
11 #include "mojo/public/cpp/system/data_pipe.h" | |
12 | |
13 namespace mojo { | |
14 | |
15 // This class simplifies the handling of multiple Reads on a DataPipe. It reads | |
16 // the data in the expected chunk size, calling the callback once a full chunk | |
17 // is ready. Callbacks are owned by this class, and are guaranteed not to be | |
18 // called after this class is destroyed. | |
19 // See also: WebSocketWriteQueue | |
20 class WebSocketReadQueue { | |
21 public: | |
22 WebSocketReadQueue(DataPipeConsumerHandle handle); | |
23 ~WebSocketReadQueue(); | |
24 | |
25 void Read(uint32_t num_bytes, base::Callback<void(const char*)> callback); | |
26 | |
27 private: | |
28 struct Operation; | |
29 | |
30 void TryToRead(); | |
31 void Wait(); | |
32 void OnHandleReady(MojoResult result); | |
33 | |
34 DataPipeConsumerHandle handle_; | |
35 common::HandleWatcher handle_watcher_; | |
36 ScopedVector<Operation> queue_; | |
37 bool is_waiting_; | |
38 }; | |
39 | |
40 } // namespace mojo | |
41 | |
42 #endif // MOJO_SERVICES_PUBLIC_CPP_NETWORK_WEB_SOCKET_READ_QUEUE_H_ | |
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