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poll_data_unix.go
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poll_data_unix.go
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// Copyright (c) 2021 Andy Pan
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux || freebsd || dragonfly || darwin
// +build linux freebsd dragonfly darwin
package netpoll
import "sync"
var pollAttachmentPool = sync.Pool{New: func() interface{} { return new(PollAttachment) }}
// GetPollAttachment attempts to get a cached PollAttachment from pool.
func GetPollAttachment() *PollAttachment {
return pollAttachmentPool.Get().(*PollAttachment)
}
// PutPollAttachment put an unused PollAttachment back to pool.
func PutPollAttachment(pa *PollAttachment) {
if pa == nil {
return
}
pa.FD, pa.Callback = 0, nil
pollAttachmentPool.Put(pa)
}
// PollAttachment is the user data which is about to be stored in "void *ptr" of epoll_data or "void *udata" of kevent.
type PollAttachment struct {
FD int
Callback PollEventHandler
}