| // Copyright 2021 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 a |
| |
| import ( |
| "fmt" |
| "sync" |
| ) |
| |
| type WrapperWithLock[T any] interface { |
| PrintWithLock() |
| } |
| |
| func NewWrapperWithLock[T any](value T) WrapperWithLock[T] { |
| return &wrapperWithLock[T]{ |
| Object: value, |
| } |
| } |
| |
| type wrapperWithLock[T any] struct { |
| Lock sync.Mutex |
| Object T |
| } |
| |
| func (w *wrapperWithLock[T]) PrintWithLock() { |
| w.Lock.Lock() |
| defer w.Lock.Unlock() |
| |
| fmt.Println(w.Object) |
| } |
