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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_READ_QUEUE_H_ | |
| 6 #define MOJO_SERVICES_NETWORK_PUBLIC_CPP_WEB_SOCKET_READ_QUEUE_H_ | |
| 7 | |
| 8 #include "base/callback.h" | |
| 9 #include "base/memory/scoped_vector.h" | |
| 10 #include "base/memory/weak_ptr.h" | |
| 11 #include "mojo/common/handle_watcher.h" | |
| 12 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h" | |
| 13 | |
| 14 namespace mojo { | |
| 15 | |
| 16 // This class simplifies the handling of multiple Reads on a DataPipe. It reads | |
| 17 // the data in the expected chunk size, calling the callback once a full chunk | |
| 18 // is ready. Callbacks are owned by this class, and are guaranteed not to be | |
| 19 // called after this class is destroyed. | |
| 20 // See also: WebSocketWriteQueue | |
| 21 class WebSocketReadQueue { | |
| 22 public: | |
| 23 explicit WebSocketReadQueue(DataPipeConsumerHandle handle); | |
| 24 ~WebSocketReadQueue(); | |
| 25 | |
| 26 void Read(uint32_t num_bytes, base::Callback<void(const char*)> callback); | |
| 27 | |
| 28 private: | |
| 29 struct Operation; | |
| 30 | |
| 31 void TryToRead(); | |
| 32 void Wait(); | |
| 33 void OnHandleReady(MojoResult result); | |
| 34 | |
| 35 DataPipeConsumerHandle handle_; | |
| 36 common::HandleWatcher handle_watcher_; | |
| 37 ScopedVector<Operation> queue_; | |
| 38 bool is_busy_; | |
| 39 base::WeakPtrFactory<WebSocketReadQueue> weak_factory_; | |
| 40 }; | |
| 41 | |
| 42 } // namespace mojo | |
| 43 | |
| 44 #endif // MOJO_SERVICES_NETWORK_PUBLIC_CPP_WEB_SOCKET_READ_QUEUE_H_ | |
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