47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows plan9
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package net
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import (
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"time"
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)
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var testingIssue5349 bool // used during tests
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// dialChannel is the simple pure-Go implementation of dial, still
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// used on operating systems where the deadline hasn't been pushed
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// down into the pollserver. (Plan 9 and some old versions of Windows)
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func dialChannel(net string, ra Addr, dialer func(time.Time) (Conn, error), deadline time.Time) (Conn, error) {
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var timeout time.Duration
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if !deadline.IsZero() {
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timeout = deadline.Sub(time.Now())
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}
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if timeout <= 0 {
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return dialer(noDeadline)
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}
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t := time.NewTimer(timeout)
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defer t.Stop()
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type racer struct {
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Conn
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error
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}
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ch := make(chan racer, 1)
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go func() {
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if testingIssue5349 {
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time.Sleep(time.Millisecond)
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}
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c, err := dialer(noDeadline)
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ch <- racer{c, err}
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}()
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select {
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case <-t.C:
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return nil, &OpError{Op: "dial", Net: net, Addr: ra, Err: errTimeout}
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case racer := <-ch:
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return racer.Conn, racer.error
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}
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}
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