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

mojo/public/go/system/message_pipe.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 system
-
-// MessagePipeHandle is a handle for a bidirectional communication channel for
-// framed data (i.e., messages). Messages can contain plain data and/or Mojo
-// handles.
-type MessagePipeHandle interface {
-        Handle
-
-        // ReadMessage reads a message from the message pipe endpoint with the
-        // specified flags. Returns the message data and attached handles that were
-        // received in the "next" message.
-        ReadMessage(flags MojoReadMessageFlags) (MojoResult, []byte, []UntypedHandle)
-
-        // WriteMessage writes message data and optional attached handles to
-        // the message pipe endpoint given by handle. On success the attached
-        // handles will no longer be valid (i.e.: the receiver will receive
-        // equivalent but logically different handles).
-        WriteMessage(bytes []byte, handles []UntypedHandle, flags MojoWriteMessageFlags) MojoResult
-}
-
-type messagePipe struct {
-        // baseHandle should always be the first component of this struct,
-        // see |finalizeHandle()| for more details.
-        baseHandle
-}
-
-func (h *messagePipe) ReadMessage(flags MojoReadMessageFlags) (MojoResult, []byte, []UntypedHandle) {
-        h.core.mu.Lock()
-        r, buf, rawHandles := sysImpl.ReadMessage(uint32(h.mojoHandle), uint32(flags))
-        h.core.mu.Unlock()
-        if r != 0 {
-                return MojoResult(r), nil, nil
-        }
-
-        handles := make([]UntypedHandle, len(rawHandles))
-        for i := 0; i < len(handles); i++ {
-                handles[i] = h.core.AcquireNativeHandle(MojoHandle(rawHandles[i]))
-        }
-        return MojoResult(r), buf, handles
-}
-
-func (h *messagePipe) WriteMessage(bytes []byte, handles []UntypedHandle, flags MojoWriteMessageFlags) MojoResult {
-
-        var rawHandles []uint32
-        if len(handles) != 0 {
-                rawHandles = make([]uint32, len(handles))
-                for i := 0; i < len(handles); i++ {
-                        rawHandles[i] = uint32(handles[i].ReleaseNativeHandle())
-                }
-        }
-        h.core.mu.Lock()
-        r := sysImpl.WriteMessage(uint32(h.mojoHandle), bytes, rawHandles, uint32(flags))
-        h.core.mu.Unlock()
-        return MojoResult(r)
-}