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- // Copyright 2018 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_
- #define COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_
- #include "base/memory/ref_counted.h"
- #include "components/cast_channel/cast_transport.h"
- #include "mojo/public/cpp/system/data_pipe.h"
- #include "mojo/public/cpp/system/simple_watcher.h"
- #include "net/base/completion_once_callback.h"
- namespace net {
- class IOBuffer;
- } // namespace net
- namespace cast_channel {
- // Helper class to read from a mojo consumer handle and write to mojo producer
- // handle.
- class MojoDataPump : public CastTransportImpl::Channel {
- public:
- MojoDataPump(mojo::ScopedDataPipeConsumerHandle receive_stream,
- mojo::ScopedDataPipeProducerHandle send_stream);
- MojoDataPump(const MojoDataPump&) = delete;
- MojoDataPump& operator=(const MojoDataPump&) = delete;
- ~MojoDataPump() override;
- // CastTransportImpl::Channel implementation:
- void Read(net::IOBuffer* io_buffer,
- int count,
- net::CompletionOnceCallback callback) override;
- void Write(net::IOBuffer* io_buffer,
- int io_buffer_size,
- net::CompletionOnceCallback callback) override;
- // Returns whether a read is pending.
- bool HasPendingRead() const { return !read_callback_.is_null(); }
- // Returns whether a write is pending.
- bool HasPendingWrite() const { return !write_callback_.is_null(); }
- private:
- void OnReadComplete(int result);
- void StartWatching();
- void ReceiveMore(MojoResult result, const mojo::HandleSignalsState& state);
- void SendMore(MojoResult result, const mojo::HandleSignalsState& state);
- mojo::ScopedDataPipeConsumerHandle receive_stream_;
- mojo::SimpleWatcher receive_stream_watcher_;
- mojo::ScopedDataPipeProducerHandle send_stream_;
- mojo::SimpleWatcher send_stream_watcher_;
- net::CompletionOnceCallback read_callback_;
- net::CompletionOnceCallback write_callback_;
- scoped_refptr<net::IOBuffer> pending_read_buffer_;
- scoped_refptr<net::IOBuffer> pending_write_buffer_;
- int pending_write_buffer_size_ = 0;
- uint32_t read_size_ = 0;
- };
- } // namespace cast_channel
- #endif // COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_
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