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bool.go
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bool.go
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// Copyright 2013-2017 Aerospike, Inc.
//
// 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 atomic
import "sync/atomic"
//AtomicBool implements a synchronized boolean value
type AtomicBool struct {
val int32
}
// NewAtomicBool generates a new AtomicBoolean instance.
func NewAtomicBool(value bool) *AtomicBool {
var i int32
if value {
i = 1
}
return &AtomicBool{
val: i,
}
}
// Get atomically retrieves the boolean value.
func (ab *AtomicBool) Get() bool {
return atomic.LoadInt32(&(ab.val)) != 0
}
// Set atomically sets the boolean value.
func (ab *AtomicBool) Set(newVal bool) {
var i int32
if newVal {
i = 1
}
atomic.StoreInt32(&(ab.val), int32(i))
}
// Or atomically applies OR operation to the boolean value.
func (ab *AtomicBool) Or(newVal bool) bool {
if !newVal {
return ab.Get()
}
atomic.StoreInt32(&(ab.val), int32(1))
return true
}
//CompareAndToggle atomically sets the boolean value if the current value is equal to updated value.
func (ab *AtomicBool) CompareAndToggle(expect bool) bool {
updated := 1
if expect {
updated = 0
}
res := atomic.CompareAndSwapInt32(&ab.val, int32(1-updated), int32(updated))
return res
}