69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
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 ioutil
|
|
|
|
import "io"
|
|
|
|
// writeCloseInformer wraps passed in write closer with a close channel.
|
|
// Caller could wait on the close channel for the write closer to be
|
|
// closed.
|
|
type writeCloseInformer struct {
|
|
close chan struct{}
|
|
wc io.WriteCloser
|
|
}
|
|
|
|
// NewWriteCloseInformer creates the writeCloseInformer from a write closer.
|
|
func NewWriteCloseInformer(wc io.WriteCloser) (io.WriteCloser, <-chan struct{}) {
|
|
close := make(chan struct{})
|
|
return &writeCloseInformer{
|
|
close: close,
|
|
wc: wc,
|
|
}, close
|
|
}
|
|
|
|
// Write passes through the data into the internal write closer.
|
|
func (w *writeCloseInformer) Write(p []byte) (int, error) {
|
|
return w.wc.Write(p)
|
|
}
|
|
|
|
// Close closes the internal write closer and inform the close channel.
|
|
func (w *writeCloseInformer) Close() error {
|
|
err := w.wc.Close()
|
|
close(w.close)
|
|
return err
|
|
}
|
|
|
|
// nopWriteCloser wraps passed in writer with a nop close function.
|
|
type nopWriteCloser struct {
|
|
w io.Writer
|
|
}
|
|
|
|
// NewNopWriteCloser creates the nopWriteCloser from a writer.
|
|
func NewNopWriteCloser(w io.Writer) io.WriteCloser {
|
|
return &nopWriteCloser{w: w}
|
|
}
|
|
|
|
// Write passes through the data into the internal writer.
|
|
func (n *nopWriteCloser) Write(p []byte) (int, error) {
|
|
return n.w.Write(p)
|
|
}
|
|
|
|
// Close is a nop close function.
|
|
func (n *nopWriteCloser) Close() error {
|
|
return nil
|
|
}
|