/
safe.go
52 lines (44 loc) · 1.1 KB
/
safe.go
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/*
* Copyright 2021 Wang Min Xiang
*
* 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 commons
import "sync/atomic"
func NewSafeFlag(on bool) *SafeFlag {
return &SafeFlag{
value: func(on bool) int64 {
if on {
return int64(1)
}
return int64(0)
}(on),
}
}
type SafeFlag struct {
value int64
}
func (f *SafeFlag) On() {
atomic.StoreInt64(&f.value, 1)
}
func (f *SafeFlag) Off() {
atomic.StoreInt64(&f.value, 0)
}
func (f *SafeFlag) IsOn() (ok bool) {
ok = atomic.LoadInt64(&f.value) == 1
return
}
func (f *SafeFlag) IsOff() (ok bool) {
ok = atomic.LoadInt64(&f.value) == 0
return
}