| // Copyright (C) 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 "io" |
| |
| type channelEvents interface { |
| closeChannel(channelId channelId, sendMsg bool) error |
| writeChannel(channelId, []byte) (int, error) |
| } |
| |
| type channel struct { |
| id channelId |
| inReader io.ReadCloser |
| inWriter io.WriteCloser |
| events channelEvents |
| } |
| |
| func newChannel(id channelId, events channelEvents) *channel { |
| inReader, inWriter := io.Pipe() |
| return &channel{ |
| id: id, |
| inReader: inReader, |
| inWriter: inWriter, |
| events: events, |
| } |
| } |
| |
| func (c *channel) closeInput() error { |
| return c.inWriter.Close() |
| } |
| |
| func (c *channel) receive(p []byte) error { |
| _, err := c.inWriter.Write(p) |
| return err |
| } |
| |
| func (c *channel) Close() error { |
| return c.events.closeChannel(c.id, true) |
| } |
| |
| func (c *channel) Read(p []byte) (n int, err error) { |
| return c.inReader.Read(p) |
| } |
| |
| func (c *channel) Write(p []byte) (n int, err error) { |
| return c.events.writeChannel(c.id, p) |
| } |