efbb12ae8a
PR go/48312 Fix fd_select.go for changes in FD handling. We have to wake up the goroutine waiting in select each time we change the set of descriptors we are waiting for, unlike epoll. From-SVN: r171623
42 lines
888 B
Go
42 lines
888 B
Go
// Copyright 2010 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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package net
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import (
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"os"
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"syscall"
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)
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func newPollServer() (s *pollServer, err os.Error) {
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s = new(pollServer)
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s.cr = make(chan *netFD, 1)
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s.cw = make(chan *netFD, 1)
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if s.pr, s.pw, err = os.Pipe(); err != nil {
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return nil, err
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}
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var e int
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if e = syscall.SetNonblock(s.pr.Fd(), true); e != 0 {
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Errno:
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err = &os.PathError{"setnonblock", s.pr.Name(), os.Errno(e)}
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Error:
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s.pr.Close()
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s.pw.Close()
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return nil, err
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}
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if e = syscall.SetNonblock(s.pw.Fd(), true); e != 0 {
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goto Errno
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}
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if s.poll, err = newpollster(); err != nil {
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goto Error
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}
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if _, err = s.poll.AddFD(s.pr.Fd(), 'r', true); err != nil {
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s.poll.Close()
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goto Error
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}
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s.pending = make(map[int]*netFD)
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go s.Run()
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return s, nil
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}
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