You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.6 KiB
98 lines
2.6 KiB
// Copyright GoFrame Author(https://goframe.org). 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 (
|
|
"math"
|
|
"strconv"
|
|
"sync/atomic"
|
|
|
|
"github.com/gogf/gf/v2/util/gconv"
|
|
)
|
|
|
|
// Float64 is a struct for concurrent-safe operation for type float64.
|
|
type Float64 struct {
|
|
value uint64
|
|
}
|
|
|
|
// NewFloat64 creates and returns a concurrent-safe object for float64 type,
|
|
// with given initial value `value`.
|
|
func NewFloat64(value ...float64) *Float64 {
|
|
if len(value) > 0 {
|
|
return &Float64{
|
|
value: math.Float64bits(value[0]),
|
|
}
|
|
}
|
|
return &Float64{}
|
|
}
|
|
|
|
// Clone clones and returns a new concurrent-safe object for float64 type.
|
|
func (v *Float64) Clone() *Float64 {
|
|
return NewFloat64(v.Val())
|
|
}
|
|
|
|
// Set atomically stores `value` into t.value and returns the previous value of t.value.
|
|
func (v *Float64) Set(value float64) (old float64) {
|
|
return math.Float64frombits(atomic.SwapUint64(&v.value, math.Float64bits(value)))
|
|
}
|
|
|
|
// Val atomically loads and returns t.value.
|
|
func (v *Float64) Val() float64 {
|
|
return math.Float64frombits(atomic.LoadUint64(&v.value))
|
|
}
|
|
|
|
// Add atomically adds `delta` to t.value and returns the new value.
|
|
func (v *Float64) Add(delta float64) (new float64) {
|
|
for {
|
|
old := math.Float64frombits(v.value)
|
|
new = old + delta
|
|
if atomic.CompareAndSwapUint64(
|
|
&v.value,
|
|
math.Float64bits(old),
|
|
math.Float64bits(new),
|
|
) {
|
|
break
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// Cas executes the compare-and-swap operation for value.
|
|
func (v *Float64) Cas(old, new float64) (swapped bool) {
|
|
return atomic.CompareAndSwapUint64(&v.value, math.Float64bits(old), math.Float64bits(new))
|
|
}
|
|
|
|
// String implements String interface for string printing.
|
|
func (v *Float64) String() string {
|
|
return strconv.FormatFloat(v.Val(), 'g', -1, 64)
|
|
}
|
|
|
|
// MarshalJSON implements the interface MarshalJSON for json.Marshal.
|
|
func (v Float64) MarshalJSON() ([]byte, error) {
|
|
return []byte(strconv.FormatFloat(v.Val(), 'g', -1, 64)), nil
|
|
}
|
|
|
|
// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
|
|
func (v *Float64) UnmarshalJSON(b []byte) error {
|
|
v.Set(gconv.Float64(string(b)))
|
|
return nil
|
|
}
|
|
|
|
// UnmarshalValue is an interface implement which sets any type of value for `v`.
|
|
func (v *Float64) UnmarshalValue(value interface{}) error {
|
|
v.Set(gconv.Float64(value))
|
|
return nil
|
|
}
|
|
|
|
// DeepCopy implements interface for deep copy of current type.
|
|
func (v *Float64) DeepCopy() interface{} {
|
|
if v == nil {
|
|
return nil
|
|
}
|
|
return NewFloat64(v.Val())
|
|
}
|