Make the fuchsia mojo/public repo the source of truth.

mojo/public/go/bindings/stub.go

-// Copyright 2015 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.
-
-package bindings
-
-import (
-        "sync"
-)
-
-// MessageReceiver can receive |Message| objects.
-type MessageReceiver interface {
-        // Accept receives a |Message|. Returns a error if the message was not
-        // handled.
-        Accept(message *Message) error
-}
-
-// Stub is a base implementation of Stub. Stubs receives messages from message
-// pipe, deserialize the payload and call the appropriate method in the
-// implementation. If the method returns result, the stub serializes the
-// response and sends it back.
-type Stub struct {
-        // Makes sure that connector is closed only once.
-        closeOnce sync.Once
-        connector *Connector
-        receiver  MessageReceiver
-}
-
-// NewStub returns a new Stub instance using provided |Connector| to send and
-// receive messages. Incoming messages are handled by the provided |receiver|.
-func NewStub(connector *Connector, receiver MessageReceiver) *Stub {
-        return &Stub{
-                connector: connector,
-                receiver:  receiver,
-        }
-}
-
-// ServeRequest synchronously serves one request from the message pipe: the
-// |Stub| waits on its underlying message pipe for a message and handles it.
-// Can be called from multiple goroutines. Each calling goroutine will receive
-// a different message or an error. Closes itself in case of error.
-func (s *Stub) ServeRequest() error {
-        message, err := s.connector.ReadMessage()
-        if err != nil {
-                s.Close()
-                return err
-        }
-        err = s.receiver.Accept(message)
-        if err != nil {
-                s.Close()
-        }
-        return err
-}
-
-// Close immediately closes the |Stub| and its underlying message pipe. If the
-// |Stub| is waiting on its message pipe handle the wait process is interrupted.
-// All goroutines trying to serve will start returning errors as the underlying
-// message pipe becomes invalid.
-func (s *Stub) Close() {
-        s.closeOnce.Do(func() {
-                s.connector.Close()
-        })
-}