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int.go
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int.go
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// Copyright 2013-2016 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"
// AtomicInt implements an int value with atomic semantics
type AtomicInt struct {
val int64
}
// NewAtomicInt generates a newVal AtomicInt instance.
func NewAtomicInt(value int) *AtomicInt {
return &AtomicInt{
val: int64(value),
}
}
// AddAndGet atomically adds the given value to the current value.
func (ai *AtomicInt) AddAndGet(delta int) int {
return int(atomic.AddInt64(&ai.val, int64(delta)))
}
// CompareAndSet atomically sets the value to the given updated value if the current value == expected value.
// Returns true if the expectation was met
func (ai *AtomicInt) CompareAndSet(expect int, update int) bool {
return atomic.CompareAndSwapInt64(&ai.val, int64(expect), int64(update))
}
// DecrementAndGet atomically decrements current value by one and returns the result.
func (ai *AtomicInt) DecrementAndGet() int {
return int(atomic.AddInt64(&ai.val, -1))
}
// Get atomically retrieves the current value.
func (ai *AtomicInt) Get() int {
return int(atomic.LoadInt64(&ai.val))
}
// GetAndAdd atomically adds the given delta to the current value and returns the result.
func (ai *AtomicInt) GetAndAdd(delta int) int {
newVal := atomic.AddInt64(&ai.val, int64(delta))
return int(newVal - int64(delta))
}
// GetAndDecrement atomically decrements the current value by one and returns the result.
func (ai *AtomicInt) GetAndDecrement() int {
newVal := atomic.AddInt64(&ai.val, -1)
return int(newVal + 1)
}
// GetAndIncrement atomically increments current value by one and returns the result.
func (ai *AtomicInt) GetAndIncrement() int {
newVal := atomic.AddInt64(&ai.val, 1)
return int(newVal - 1)
}
// GetAndSet atomically sets current value to the given value and returns the old value.
func (ai *AtomicInt) GetAndSet(newValue int) int {
return int(atomic.SwapInt64(&ai.val, int64(newValue)))
}
// IncrementAndGet atomically increments current value by one and returns the result.
func (ai *AtomicInt) IncrementAndGet() int {
return int(atomic.AddInt64(&ai.val, 1))
}
// Set atomically sets current value to the given value.
func (ai *AtomicInt) Set(newValue int) {
atomic.StoreInt64(&ai.val, int64(newValue))
}