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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_NETWORK_PUBLIC_CPP_WEB_SOCKET_WRITE_QUEUE_H_ | |
6 #define MOJO_SERVICES_NETWORK_PUBLIC_CPP_WEB_SOCKET_WRITE_QUEUE_H_ | |
7 | |
8 #include <stdint.h> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/memory/scoped_vector.h" | |
12 #include "base/memory/weak_ptr.h" | |
13 #include "mojo/message_pump/handle_watcher.h" | |
14 #include "mojo/public/cpp/system/data_pipe.h" | |
15 | |
16 namespace mojo { | |
17 | |
18 // This class simplifies the handling of multiple Writes on a DataPipe. It | |
19 // writes each chunk all at once (or waits until the pipe is ready before | |
20 // writing), calling the callback when finished. Callbacks are owned by this | |
21 // class, and are guaranteed not to be called after this class is destroyed. | |
22 // See also: WebSocketReadQueue | |
23 class WebSocketWriteQueue { | |
24 public: | |
25 explicit WebSocketWriteQueue(DataPipeProducerHandle handle); | |
26 ~WebSocketWriteQueue(); | |
27 | |
28 void Write(const char* data, | |
29 uint32_t num_bytes, | |
30 base::Callback<void(const char*)> callback); | |
31 | |
32 private: | |
33 struct Operation; | |
34 | |
35 void TryToWrite(); | |
36 void Wait(); | |
37 void OnHandleReady(MojoResult result); | |
38 | |
39 DataPipeProducerHandle handle_; | |
40 common::HandleWatcher handle_watcher_; | |
41 ScopedVector<Operation> queue_; | |
42 bool is_busy_; | |
43 base::WeakPtrFactory<WebSocketWriteQueue> weak_factory_; | |
44 }; | |
45 | |
46 } // namespace mojo | |
47 | |
48 #endif // MOJO_SERVICES_NETWORK_PUBLIC_CPP_WEB_SOCKET_WRITE_QUEUE_H_ | |
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