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https://github.com/golang/go
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c768a84b38
We don't need placeholders for the old built-in poll server any more. Change-Id: I3a510aec6a30bc2ac97676c400177cdfe557b8dc Reviewed-on: https://go-review.googlesource.com/3863 Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
// Copyright 2013 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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"syscall"
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"time"
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)
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type pollDesc struct {
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fd *netFD
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closing bool
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}
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func (pd *pollDesc) Init(fd *netFD) error { pd.fd = fd; return nil }
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func (pd *pollDesc) Close() {}
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func (pd *pollDesc) Evict() {
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pd.closing = true
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if pd.fd != nil {
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syscall.StopIO(pd.fd.sysfd)
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}
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}
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func (pd *pollDesc) Prepare(mode int) error {
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if pd.closing {
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return errClosing
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}
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return nil
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}
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func (pd *pollDesc) PrepareRead() error { return pd.Prepare('r') }
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func (pd *pollDesc) PrepareWrite() error { return pd.Prepare('w') }
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func (pd *pollDesc) Wait(mode int) error {
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if pd.closing {
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return errClosing
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}
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return errTimeout
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}
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func (pd *pollDesc) WaitRead() error { return pd.Wait('r') }
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func (pd *pollDesc) WaitWrite() error { return pd.Wait('w') }
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func (pd *pollDesc) WaitCanceled(mode int) {}
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func (pd *pollDesc) WaitCanceledRead() {}
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func (pd *pollDesc) WaitCanceledWrite() {}
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func (fd *netFD) setDeadline(t time.Time) error {
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return setDeadlineImpl(fd, t, 'r'+'w')
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}
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func (fd *netFD) setReadDeadline(t time.Time) error {
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return setDeadlineImpl(fd, t, 'r')
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}
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func (fd *netFD) setWriteDeadline(t time.Time) error {
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return setDeadlineImpl(fd, t, 'w')
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}
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func setDeadlineImpl(fd *netFD, t time.Time, mode int) error {
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d := t.UnixNano()
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if t.IsZero() {
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d = 0
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}
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if err := fd.incref(); err != nil {
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return err
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}
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switch mode {
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case 'r':
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syscall.SetReadDeadline(fd.sysfd, d)
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case 'w':
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syscall.SetWriteDeadline(fd.sysfd, d)
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case 'r' + 'w':
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syscall.SetReadDeadline(fd.sysfd, d)
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syscall.SetWriteDeadline(fd.sysfd, d)
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}
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fd.decref()
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return nil
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}
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