84 lines
1.6 KiB
Go
84 lines
1.6 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package io
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import (
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"context"
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"fmt"
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"io"
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"net"
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"os"
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"sync"
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winio "github.com/Microsoft/go-winio"
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)
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type pipe struct {
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l net.Listener
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con net.Conn
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conErr error
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conWg sync.WaitGroup
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}
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func openPipe(ctx context.Context, fn string, flag int, perm os.FileMode) (io.ReadWriteCloser, error) {
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l, err := winio.ListenPipe(fn, nil)
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if err != nil {
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return nil, err
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}
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p := &pipe{l: l}
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p.conWg.Add(1)
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go func() {
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defer p.conWg.Done()
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c, err := l.Accept()
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if err != nil {
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p.conErr = err
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return
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}
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p.con = c
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}()
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go func() {
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<-ctx.Done()
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p.Close()
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}()
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return p, nil
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}
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func (p *pipe) Write(b []byte) (int, error) {
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p.conWg.Wait()
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if p.conErr != nil {
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return 0, fmt.Errorf("connection error: %w", p.conErr)
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}
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return p.con.Write(b)
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}
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func (p *pipe) Read(b []byte) (int, error) {
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p.conWg.Wait()
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if p.conErr != nil {
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return 0, fmt.Errorf("connection error: %w", p.conErr)
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}
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return p.con.Read(b)
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}
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func (p *pipe) Close() error {
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p.l.Close()
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p.conWg.Wait()
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if p.con != nil {
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return p.con.Close()
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}
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return p.conErr
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}
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