text: // 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_EDK_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
  #define MOJO_EDK_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
  
  #include "mojo/edk/system/awakable_list.h"
  #include "mojo/edk/system/handle_signals_state.h"
  #include "mojo/edk/system/message_in_transit_queue.h"
  #include "mojo/edk/system/message_pipe_endpoint.h"
  #include "mojo/edk/system/system_impl_export.h"
  #include "mojo/public/cpp/system/macros.h"
  
  namespace mojo {
  namespace system {
  
  class MOJO_SYSTEM_IMPL_EXPORT LocalMessagePipeEndpoint final
      : public MessagePipeEndpoint {
   public:
    // If |message_queue| is non-null, its contents will be taken as the queue of
    // (already-received) messages.
    explicit LocalMessagePipeEndpoint(
        MessageInTransitQueue* message_queue = nullptr);
    ~LocalMessagePipeEndpoint() override;
  
    // |MessagePipeEndpoint| implementation:
    Type GetType() const override;
    bool OnPeerClose() override;
    void EnqueueMessage(scoped_ptr<MessageInTransit> message) override;
  
    // There's a dispatcher for |LocalMessagePipeEndpoint|s, so we have to
    // implement/override these:
    void Close() override;
    void CancelAllAwakables() override;
    MojoResult ReadMessage(UserPointer<void> bytes,
                           UserPointer<uint32_t> num_bytes,
                           DispatcherVector* dispatchers,
                           uint32_t* num_dispatchers,
                           MojoReadMessageFlags flags) override;
    HandleSignalsState GetHandleSignalsState() const override;
    MojoResult AddAwakable(Awakable* awakable,
                           MojoHandleSignals signals,
                           uint32_t context,
                           HandleSignalsState* signals_state) override;
    void RemoveAwakable(Awakable* awakable,
                        HandleSignalsState* signals_state) override;
  
    // This is only to be used by |MessagePipe|:
    MessageInTransitQueue* message_queue() { return &message_queue_; }
  
   private:
    bool is_open_;
    bool is_peer_open_;
  
    // Queue of incoming messages.
    MessageInTransitQueue message_queue_;
    AwakableList awakable_list_;
  
    MOJO_DISALLOW_COPY_AND_ASSIGN(LocalMessagePipeEndpoint);
  };
  
  }  // namespace system
  }  // namespace mojo
  
  #endif  // MOJO_EDK_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
  