| // compile -d=checkptr | |
| // Copyright 2022 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 main | |
| import ( | |
| "sync/atomic" | |
| "unsafe" | |
| ) | |
| type Node[T any] struct { | |
| Next *Node[T] | |
| // Prev *Node[T] | |
| } | |
| func LoadPointer[T any](addr **T) (val *T) { | |
| return (*T)( | |
| atomic.LoadPointer( | |
| (*unsafe.Pointer)(unsafe.Pointer(addr)), | |
| )) | |
| } | |
| func (q *Node[T]) Pop() { | |
| var tail, head *Node[T] | |
| if head == LoadPointer(&tail) { | |
| } | |
| } | |
| func main() { | |
| ch := Node[uint64]{} | |
| ch.Pop() | |
| } |