multiplexer/messages.go

/*
 * Copyright 2015, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package multiplexer

import (
	"android.googlesource.com/platform/tools/gpu/binary"
)

const (
	msgTypeOpenChannel = msgType(iota)
	msgTypeCloseChannel
	msgTypeData
)

type msg interface {
	channel() channelId
	encode(e *binary.Encoder) error
	decode(d *binary.Decoder) error
}

type msgOpenChannel struct {
	channelId
}

type msgCloseChannel struct {
	channelId
}

type msgData struct {
	c channelId
	d binary.Data
}

func (m msgData) encode(e *binary.Encoder) error {
	if err := m.c.encode(e); err != nil {
		return err
	}
	return m.d.Encode(e)
}

func (m *msgData) decode(d *binary.Decoder) error {
	if err := m.c.decode(d); err != nil {
		return err
	}
	return m.d.Decode(d)
}