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Copy pathint.go
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76 lines (63 loc) · 2.06 KB
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// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gtype
import (
"github.com/gogf/gf/util/gconv"
"strconv"
"sync/atomic"
)
// Int is a struct for concurrent-safe operation for type int.
type Int struct {
value int64
}
// NewInt creates and returns a concurrent-safe object for int type,
// with given initial value <value>.
func NewInt(value ...int) *Int {
if len(value) > 0 {
return &Int{
value: int64(value[0]),
}
}
return &Int{}
}
// Clone clones and returns a new concurrent-safe object for int type.
func (v *Int) Clone() *Int {
return NewInt(v.Val())
}
// Set atomically stores <value> into t.value and returns the previous value of t.value.
func (v *Int) Set(value int) (old int) {
return int(atomic.SwapInt64(&v.value, int64(value)))
}
// Val atomically loads and returns t.value.
func (v *Int) Val() int {
return int(atomic.LoadInt64(&v.value))
}
// Add atomically adds <delta> to t.value and returns the new value.
func (v *Int) Add(delta int) (new int) {
return int(atomic.AddInt64(&v.value, int64(delta)))
}
// Cas executes the compare-and-swap operation for value.
func (v *Int) Cas(old, new int) (swapped bool) {
return atomic.CompareAndSwapInt64(&v.value, int64(old), int64(new))
}
// String implements String interface for string printing.
func (v *Int) String() string {
return strconv.Itoa(v.Val())
}
// MarshalJSON implements the interface MarshalJSON for json.Marshal.
func (v *Int) MarshalJSON() ([]byte, error) {
return gconv.UnsafeStrToBytes(strconv.Itoa(v.Val())), nil
}
// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
func (v *Int) UnmarshalJSON(b []byte) error {
v.Set(gconv.Int(gconv.UnsafeBytesToStr(b)))
return nil
}
// UnmarshalValue is an interface implement which sets any type of value for <v>.
func (v *Int) UnmarshalValue(value interface{}) error {
v.Set(gconv.Int(value))
return nil
}