| // Copyright 2013 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 MOJO_PUBLIC_BINDINGS_LIB_CONNECTOR_H_ |
| #define MOJO_PUBLIC_BINDINGS_LIB_CONNECTOR_H_ |
| |
| #include "mojo/public/bindings/lib/bindings_support.h" |
| #include "mojo/public/bindings/lib/message.h" |
| #include "mojo/public/bindings/lib/message_queue.h" |
| #include "mojo/public/system/core_cpp.h" |
| |
| namespace mojo { |
| namespace internal { |
| |
| // The Connector class is responsible for performing read/write operations on a |
| // MessagePipe. It writes messages it receives through the MessageReceiver |
| // interface that it subclasses, and it forwards messages it reads through the |
| // MessageReceiver interface assigned as its incoming receiver. |
| // |
| // NOTE: MessagePipe I/O is non-blocking. |
| // |
| class Connector : public MessageReceiver { |
| public: |
| // The Connector takes ownership of |message_pipe|. |
| explicit Connector(ScopedMessagePipeHandle message_pipe); |
| virtual ~Connector(); |
| |
| // Sets the receiver to handle messages read from the message pipe. The |
| // Connector will only read messages from the pipe if an incoming receiver |
| // has been set. |
| void SetIncomingReceiver(MessageReceiver* receiver); |
| |
| // Returns true if an error was encountered while reading from or writing to |
| // the message pipe. |
| bool encountered_error() const { return error_; } |
| |
| // MessageReceiver implementation: |
| virtual bool Accept(Message* message) MOJO_OVERRIDE; |
| |
| private: |
| class Callback : public BindingsSupport::AsyncWaitCallback { |
| public: |
| Callback(); |
| virtual ~Callback(); |
| |
| void SetOwnerToNotify(Connector* owner); |
| void SetAsyncWaitID(BindingsSupport::AsyncWaitID async_wait_id); |
| |
| virtual void OnHandleReady(MojoResult result) MOJO_OVERRIDE; |
| |
| private: |
| Connector* owner_; |
| BindingsSupport::AsyncWaitID async_wait_id_; |
| }; |
| friend class Callback; |
| |
| void OnHandleReady(Callback* callback, MojoResult result); |
| void WaitToReadMore(); |
| void WaitToWriteMore(); |
| void ReadMore(); |
| void WriteMore(); |
| void WriteOne(Message* message, bool* wait_to_write); |
| |
| ScopedMessagePipeHandle message_pipe_; |
| MessageReceiver* incoming_receiver_; |
| MessageQueue write_queue_; |
| |
| Callback read_callback_; |
| Callback write_callback_; |
| |
| bool error_; |
| |
| MOJO_DISALLOW_COPY_AND_ASSIGN(Connector); |
| }; |
| |
| } // namespace internal |
| } // namespace mojo |
| |
| #endif // MOJO_PUBLIC_BINDINGS_LIB_CONNECTOR_H_ |