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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_PROTOCOL_NAMED_MESSAGE_PIPE_HANDLER_H_
#define REMOTING_PROTOCOL_NAMED_MESSAGE_PIPE_HANDLER_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/task/sequenced_task_runner_helpers.h"
#include "base/threading/thread_checker.h"
#include "remoting/protocol/message_pipe.h"
namespace google {
namespace protobuf {
class MessageLite;
} // namespace protobuf
} // namespace google
namespace remoting {
class CompoundBuffer;
namespace protocol {
// A base class to handle data from a named MessagePipe. This class manages the
// lifetime itself: it deletes itself once the MessagePipe is closed or the
// derived instance actively calls Close() function.
class NamedMessagePipeHandler : public MessagePipe::EventHandler {
protected:
// The callers should create instances of derived classes instead of this
// class. So hide the constructor.
NamedMessagePipeHandler(const std::string& name,
std::unique_ptr<MessagePipe> pipe);
~NamedMessagePipeHandler() override;
// Closes the channel and eventually destructs this instance. No operations
// should be performed after executing this function.
void Close();
const std::string& pipe_name() const { return name_; }
// Whether |pipe_| has been connected.
bool connected() const { return is_connected_; }
// Sends the message through the pipe. This function should only be called
// once connected() returns true. See comments of
// remoting::protocol::MessagePipe::Send() for details.
void Send(const google::protobuf::MessageLite& message,
base::OnceClosure done);
// Derived classes can override these functions to receive data from the
// connection or observe the connection state. These functions will not be
// called unless |pipe_| has been opened.
virtual void OnIncomingMessage(std::unique_ptr<CompoundBuffer> message);
virtual void OnConnected();
virtual void OnDisconnecting();
private:
friend class base::DeleteHelper<NamedMessagePipeHandler>;
// MessagePipe::EventHandler implementation.
void OnMessagePipeOpen() override;
void OnMessageReceived(std::unique_ptr<CompoundBuffer> message) override;
void OnMessagePipeClosed() override;
const std::string name_;
std::unique_ptr<MessagePipe> pipe_;
bool is_connected_ = false;
THREAD_CHECKER(thread_checker_);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_NAMED_MESSAGE_PIPE_HANDLER_H_
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