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