Source file src/pkg/net/newpollserver.go

// Copyright 2010 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.

package net

import (
    "os"
    "syscall"
)

func newPollServer() (s *pollServer, err os.Error) {
    s = new(pollServer)
    s.cr = make(chan *netFD, 1)
    s.cw = make(chan *netFD, 1)
    if s.pr, s.pw, err = os.Pipe(); err != nil {
        return nil, err
    }
    var e int
    if e = syscall.SetNonblock(s.pr.Fd(), true); e != 0 {
    Errno:
        err = &os.PathError{"setnonblock", s.pr.Name(), os.Errno(e)}
    Error:
        s.pr.Close()
        s.pw.Close()
        return nil, err
    }
    if e = syscall.SetNonblock(s.pw.Fd(), true); e != 0 {
        goto Errno
    }
    if s.poll, err = newpollster(); err != nil {
        goto Error
    }
    if err = s.poll.AddFD(s.pr.Fd(), 'r', true); err != nil {
        s.poll.Close()
        goto Error
    }
    s.pending = make(map[int]*netFD)
    go s.Run()
    return s, nil
}