etcd/wal/multi_readcloser.go

48 lines
1.2 KiB
Go

/*
Copyright 2014 CoreOS, Inc.
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 wal
import "io"
type multiReadCloser struct {
closers []io.Closer
reader io.Reader
}
func (mc *multiReadCloser) Close() error {
var err error
for i := range mc.closers {
err = mc.closers[i].Close()
}
return err
}
func (mc *multiReadCloser) Read(p []byte) (int, error) {
return mc.reader.Read(p)
}
func MultiReadCloser(readClosers ...io.ReadCloser) io.ReadCloser {
cs := make([]io.Closer, len(readClosers))
rs := make([]io.Reader, len(readClosers))
for i := range readClosers {
cs[i] = readClosers[i]
rs[i] = readClosers[i]
}
r := io.MultiReader(rs...)
return &multiReadCloser{cs, r}
}