mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-24 07:31:32 +00:00
90 lines
1.7 KiB
Go
90 lines
1.7 KiB
Go
// Copyright 2013 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 (
|
|
"runtime"
|
|
"syscall"
|
|
"time"
|
|
)
|
|
|
|
type pollDesc struct {
|
|
fd *netFD
|
|
closing bool
|
|
}
|
|
|
|
func (pd *pollDesc) init(fd *netFD) error { pd.fd = fd; return nil }
|
|
|
|
func (pd *pollDesc) close() {}
|
|
|
|
func (pd *pollDesc) evict() {
|
|
pd.closing = true
|
|
if pd.fd != nil {
|
|
syscall.StopIO(pd.fd.sysfd)
|
|
runtime.KeepAlive(pd.fd)
|
|
}
|
|
}
|
|
|
|
func (pd *pollDesc) prepare(mode int) error {
|
|
if pd.closing {
|
|
return errClosing
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (pd *pollDesc) prepareRead() error { return pd.prepare('r') }
|
|
|
|
func (pd *pollDesc) prepareWrite() error { return pd.prepare('w') }
|
|
|
|
func (pd *pollDesc) wait(mode int) error {
|
|
if pd.closing {
|
|
return errClosing
|
|
}
|
|
return errTimeout
|
|
}
|
|
|
|
func (pd *pollDesc) waitRead() error { return pd.wait('r') }
|
|
|
|
func (pd *pollDesc) waitWrite() error { return pd.wait('w') }
|
|
|
|
func (pd *pollDesc) waitCanceled(mode int) {}
|
|
|
|
func (pd *pollDesc) waitCanceledRead() {}
|
|
|
|
func (pd *pollDesc) waitCanceledWrite() {}
|
|
|
|
func (fd *netFD) setDeadline(t time.Time) error {
|
|
return setDeadlineImpl(fd, t, 'r'+'w')
|
|
}
|
|
|
|
func (fd *netFD) setReadDeadline(t time.Time) error {
|
|
return setDeadlineImpl(fd, t, 'r')
|
|
}
|
|
|
|
func (fd *netFD) setWriteDeadline(t time.Time) error {
|
|
return setDeadlineImpl(fd, t, 'w')
|
|
}
|
|
|
|
func setDeadlineImpl(fd *netFD, t time.Time, mode int) error {
|
|
d := t.UnixNano()
|
|
if t.IsZero() {
|
|
d = 0
|
|
}
|
|
if err := fd.incref(); err != nil {
|
|
return err
|
|
}
|
|
switch mode {
|
|
case 'r':
|
|
syscall.SetReadDeadline(fd.sysfd, d)
|
|
case 'w':
|
|
syscall.SetWriteDeadline(fd.sysfd, d)
|
|
case 'r' + 'w':
|
|
syscall.SetReadDeadline(fd.sysfd, d)
|
|
syscall.SetWriteDeadline(fd.sysfd, d)
|
|
}
|
|
fd.decref()
|
|
return nil
|
|
}
|