| // 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() |
| } |
