135261e8e2
bind.h, callback.h, callback_forward.h, and callback_helpers.h moved into /base/functional/. Update the include paths to directly include them in their new location. Bug: 1364441 Change-Id: I7cace513100cdf727d14419cf5817fda92941012 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4157696 Reviewed-by: Daniel Cheng <dcheng@chromium.org> Commit-Queue: Daniel Cheng <dcheng@chromium.org> Auto-Submit: Avi Drissman <avi@chromium.org> Owners-Override: Daniel Cheng <dcheng@chromium.org> Commit-Queue: Avi Drissman <avi@chromium.org> Owners-Override: Avi Drissman <avi@chromium.org> Cr-Commit-Position: refs/heads/main@{#1091527}
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
// Copyright 2012 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef REMOTING_PROTOCOL_MESSAGE_READER_H_
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#define REMOTING_PROTOCOL_MESSAGE_READER_H_
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#include <memory>
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#include "base/functional/callback.h"
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#include "base/memory/raw_ptr.h"
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#include "base/memory/weak_ptr.h"
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#include "base/sequence_checker.h"
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#include "remoting/base/compound_buffer.h"
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#include "remoting/protocol/message_decoder.h"
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namespace net {
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class IOBuffer;
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} // namespace net
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namespace remoting::protocol {
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class P2PStreamSocket;
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// MessageReader reads data from the socket asynchronously and calls the
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// callback for each message it receives. It stops calling the callback as soon
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// as the socket is closed, so the socket should always be closed before the
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// callback handler is destroyed.
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//
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// In order to throttle the stream, MessageReader doesn't try to read new data
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// from the socket until all previously received messages are processed by the
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// receiver (|done_task| is called for each message). It is still possible that
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// the MessageReceivedCallback is called twice (so that there is more than one
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// outstanding message), e.g. when we the sender sends multiple messages in one
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// TCP packet.
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class MessageReader {
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public:
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typedef base::RepeatingCallback<void(std::unique_ptr<CompoundBuffer> message)>
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MessageReceivedCallback;
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typedef base::OnceCallback<void(int)> ReadFailedCallback;
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MessageReader();
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MessageReader(const MessageReader&) = delete;
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MessageReader& operator=(const MessageReader&) = delete;
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virtual ~MessageReader();
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// Starts reading from |socket|.
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void StartReading(P2PStreamSocket* socket,
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const MessageReceivedCallback& message_received_callback,
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ReadFailedCallback read_failed_callback);
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private:
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void DoRead();
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void OnRead(int result);
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// Returns true on success, or runs |read_failed_callback_| and returns false
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// on failure. When false is returned, |this| may be deleted.
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bool HandleReadResult(int result);
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void OnDataReceived(net::IOBuffer* data, int data_size);
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void RunCallback(std::unique_ptr<CompoundBuffer> message);
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bool DidReadFail();
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ReadFailedCallback read_failed_callback_;
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raw_ptr<P2PStreamSocket> socket_ = nullptr;
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// Set to true, when we have a socket read pending, and expecting
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// OnRead() to be called when new data is received.
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bool read_pending_ = false;
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bool closed_ = false;
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scoped_refptr<net::IOBuffer> read_buffer_;
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MessageDecoder message_decoder_;
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// Callback is called when a message is received.
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MessageReceivedCallback message_received_callback_;
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SEQUENCE_CHECKER(sequence_checker_);
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base::WeakPtrFactory<MessageReader> weak_factory_{this};
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};
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} // namespace remoting::protocol
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#endif // REMOTING_PROTOCOL_MESSAGE_READER_H_
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