-
Notifications
You must be signed in to change notification settings - Fork 56
/
atomic.go
42 lines (37 loc) · 1.16 KB
/
atomic.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
/*
* Copyright (c) 2008-2022, Hazelcast, Inc. All Rights Reserved.
*
* 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.
*/
package internal
import (
"sync/atomic"
"unsafe"
)
// AtomicValue keeps the pointer to an interface{}.
// Storing and loading values is concurrency-safe.
type AtomicValue struct {
value unsafe.Pointer
}
// Store stores the given interface{} pointer.
func (a *AtomicValue) Store(v *interface{}) {
atomic.StorePointer(&a.value, unsafe.Pointer(v))
}
// Load loads the given interface{} pointer and returns an interface{}.
func (a *AtomicValue) Load() interface{} {
v := (*interface{})(atomic.LoadPointer(&a.value))
if v == nil {
return v
}
return *v
}