52 lines
844 B
Go
52 lines
844 B
Go
package containerd
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import (
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"net"
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"time"
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"github.com/pkg/errors"
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)
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type dialResult struct {
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c net.Conn
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err error
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}
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// Dialer returns a GRPC net.Conn connected to the provided address
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func Dialer(address string, timeout time.Duration) (net.Conn, error) {
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var (
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stopC = make(chan struct{})
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synC = make(chan *dialResult)
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)
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go func() {
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defer close(synC)
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for {
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select {
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case <-stopC:
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return
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default:
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c, err := dialer(address, timeout)
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if isNoent(err) {
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<-time.After(10 * time.Millisecond)
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continue
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}
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synC <- &dialResult{c, err}
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return
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}
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}
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}()
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select {
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case dr := <-synC:
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return dr.c, dr.err
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case <-time.After(timeout):
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close(stopC)
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go func() {
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dr := <-synC
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if dr != nil {
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dr.c.Close()
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}
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}()
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return nil, errors.Errorf("dial %s: timeout", address)
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}
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}
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