mirror of https://github.com/tidwall/evio.git
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
// Copyright 2017 Joshua J Baker. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// +build darwin netbsd freebsd openbsd dragonfly
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package internal
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import (
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"syscall"
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"time"
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)
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func AddWrite(p, fd int, on *bool) error {
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if *on {
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return nil
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}
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*on = true
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_, err := syscall.Kevent(p,
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[]syscall.Kevent_t{{Ident: uint64(fd),
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Flags: syscall.EV_ADD, Filter: syscall.EVFILT_WRITE}},
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nil, nil)
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return err
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}
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func DelWrite(p, fd int, on *bool) error {
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if !*on {
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return nil
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}
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*on = false
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_, err := syscall.Kevent(p,
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[]syscall.Kevent_t{{Ident: uint64(fd),
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Flags: syscall.EV_DELETE, Filter: syscall.EVFILT_WRITE}},
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nil, nil)
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return err
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}
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func MakePoll() (p int, err error) {
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return syscall.Kqueue()
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}
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func AddRead(p, fd int) error {
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_, err := syscall.Kevent(p,
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[]syscall.Kevent_t{{Ident: uint64(fd),
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Flags: syscall.EV_ADD, Filter: syscall.EVFILT_READ}},
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nil, nil)
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return err
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}
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func MakeEvents(n int) interface{} {
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return make([]syscall.Kevent_t, n)
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}
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func Wait(p int, evs interface{}, timeout time.Duration) (n int, err error) {
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if timeout < 0 {
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timeout = 0
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}
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ts := syscall.NsecToTimespec(int64(timeout))
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return syscall.Kevent(p, nil, evs.([]syscall.Kevent_t), &ts)
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}
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func GetFD(evs interface{}, i int) int {
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return int(evs.([]syscall.Kevent_t)[i].Ident)
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}
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