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71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package gtype
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import (
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"github.com/gogf/gf/util/gconv"
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"strconv"
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"sync/atomic"
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)
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// Uint is a struct for concurrent-safe operation for type uint.
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type Uint struct {
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value uint64
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}
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// NewUint creates and returns a concurrent-safe object for uint type,
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// with given initial value <value>.
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func NewUint(value ...uint) *Uint {
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if len(value) > 0 {
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return &Uint{
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value: uint64(value[0]),
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}
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}
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return &Uint{}
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}
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// Clone clones and returns a new concurrent-safe object for uint type.
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func (v *Uint) Clone() *Uint {
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return NewUint(v.Val())
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}
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// Set atomically stores <value> into t.value and returns the previous value of t.value.
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func (v *Uint) Set(value uint) (old uint) {
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return uint(atomic.SwapUint64(&v.value, uint64(value)))
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}
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// Val atomically loads and returns t.value.
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func (v *Uint) Val() uint {
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return uint(atomic.LoadUint64(&v.value))
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}
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// Add atomically adds <delta> to t.value and returns the new value.
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func (v *Uint) Add(delta uint) (new uint) {
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return uint(atomic.AddUint64(&v.value, uint64(delta)))
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}
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// Cas executes the compare-and-swap operation for value.
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func (v *Uint) Cas(old, new uint) (swapped bool) {
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return atomic.CompareAndSwapUint64(&v.value, uint64(old), uint64(new))
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}
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// String implements String interface for string printing.
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func (v *Uint) String() string {
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return strconv.FormatUint(uint64(v.Val()), 10)
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}
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// MarshalJSON implements the interface MarshalJSON for json.Marshal.
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func (v *Uint) MarshalJSON() ([]byte, error) {
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return gconv.UnsafeStrToBytes(strconv.FormatUint(uint64(v.Val()), 10)), nil
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}
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// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
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func (v *Uint) UnmarshalJSON(b []byte) error {
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v.Set(gconv.Uint(gconv.UnsafeBytesToStr(b)))
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return nil
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}
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