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98 lines
2.6 KiB
98 lines
2.6 KiB
// Copyright GoFrame Author(https://goframe.org). 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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"math"
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"strconv"
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"sync/atomic"
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"github.com/gogf/gf/v2/util/gconv"
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)
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// Float32 is a struct for concurrent-safe operation for type float32.
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type Float32 struct {
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value uint32
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}
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// NewFloat32 creates and returns a concurrent-safe object for float32 type,
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// with given initial value `value`.
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func NewFloat32(value ...float32) *Float32 {
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if len(value) > 0 {
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return &Float32{
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value: math.Float32bits(value[0]),
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}
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}
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return &Float32{}
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}
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// Clone clones and returns a new concurrent-safe object for float32 type.
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func (v *Float32) Clone() *Float32 {
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return NewFloat32(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 *Float32) Set(value float32) (old float32) {
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return math.Float32frombits(atomic.SwapUint32(&v.value, math.Float32bits(value)))
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}
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// Val atomically loads and returns t.value.
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func (v *Float32) Val() float32 {
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return math.Float32frombits(atomic.LoadUint32(&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 *Float32) Add(delta float32) (new float32) {
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for {
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old := math.Float32frombits(v.value)
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new = old + delta
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if atomic.CompareAndSwapUint32(
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&v.value,
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math.Float32bits(old),
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math.Float32bits(new),
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) {
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break
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}
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}
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return
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}
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// Cas executes the compare-and-swap operation for value.
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func (v *Float32) Cas(old, new float32) (swapped bool) {
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return atomic.CompareAndSwapUint32(&v.value, math.Float32bits(old), math.Float32bits(new))
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}
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// String implements String interface for string printing.
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func (v *Float32) String() string {
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return strconv.FormatFloat(float64(v.Val()), 'g', -1, 32)
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}
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// MarshalJSON implements the interface MarshalJSON for json.Marshal.
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func (v Float32) MarshalJSON() ([]byte, error) {
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return []byte(strconv.FormatFloat(float64(v.Val()), 'g', -1, 32)), nil
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}
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// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
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func (v *Float32) UnmarshalJSON(b []byte) error {
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v.Set(gconv.Float32(string(b)))
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return nil
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}
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// UnmarshalValue is an interface implement which sets any type of value for `v`.
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func (v *Float32) UnmarshalValue(value interface{}) error {
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v.Set(gconv.Float32(value))
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return nil
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}
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// DeepCopy implements interface for deep copy of current type.
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func (v *Float32) DeepCopy() interface{} {
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if v == nil {
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return nil
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}
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return NewFloat32(v.Val())
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}
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