mirror of https://github.com/minio/minio.git
65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package ioutil
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import (
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"io"
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"sync"
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)
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// PipeWriter is similar to io.PipeWriter with wait group
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type PipeWriter struct {
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*io.PipeWriter
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done func()
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}
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// CloseWithError close with supplied error the writer end.
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func (w *PipeWriter) CloseWithError(err error) error {
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err = w.PipeWriter.CloseWithError(err)
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w.done()
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return err
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}
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// PipeReader is similar to io.PipeReader with wait group
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type PipeReader struct {
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*io.PipeReader
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wait func()
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}
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// CloseWithError close with supplied error the reader end
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func (r *PipeReader) CloseWithError(err error) error {
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err = r.PipeReader.CloseWithError(err)
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r.wait()
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return err
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}
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// WaitPipe implements wait-group backend io.Pipe to provide
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// synchronization between read() end with write() end.
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func WaitPipe() (*PipeReader, *PipeWriter) {
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r, w := io.Pipe()
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var wg sync.WaitGroup
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wg.Add(1)
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return &PipeReader{
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PipeReader: r,
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wait: wg.Wait,
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}, &PipeWriter{
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PipeWriter: w,
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done: wg.Done,
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}
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}
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