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Original file line number | Diff line number | Diff line change |
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@@ -1,127 +1,148 @@ | ||
package list | ||
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||
import ( | ||
"sync" | ||
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||
"github.com/ecodeclub/ekit/internal/errs" | ||
"github.com/ecodeclub/ekit/internal/slice" | ||
) | ||
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||
var ( | ||
_ List[any] = &CopyOnWriteArrayList[any]{} | ||
) | ||
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||
// CopyOnWriteArrayList 基于切片的简单封装 写时加锁,读不加锁,适合于读多写少场景 | ||
type CopyOnWriteArrayList[T any] struct { | ||
vals []T | ||
mutex *sync.Mutex | ||
} | ||
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// NewCopyOnWriteArrayList | ||
func NewCopyOnWriteArrayList[T any]() *CopyOnWriteArrayList[T] { | ||
m := &sync.Mutex{} | ||
return &CopyOnWriteArrayList[T]{ | ||
vals: make([]T, 0), | ||
mutex: m, | ||
} | ||
} | ||
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// NewCopyOnWriteArrayListOf 直接使用 ts,会执行复制 | ||
func NewCopyOnWriteArrayListOf[T any](ts []T) *CopyOnWriteArrayList[T] { | ||
items := make([]T, len(ts)) | ||
copy(items, ts) | ||
m := &sync.Mutex{} | ||
return &CopyOnWriteArrayList[T]{ | ||
vals: items, | ||
mutex: m, | ||
} | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Get(index int) (t T, e error) { | ||
l := a.Len() | ||
if index < 0 || index >= l { | ||
return t, errs.NewErrIndexOutOfRange(l, index) | ||
} | ||
return a.vals[index], e | ||
} | ||
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// Append 往CopyOnWriteArrayList里追加数据 | ||
func (a *CopyOnWriteArrayList[T]) Append(ts ...T) error { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
newItems := make([]T, n, n+len(ts)) | ||
copy(newItems, a.vals) | ||
newItems = append(newItems, ts...) | ||
a.vals = newItems | ||
return nil | ||
} | ||
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// Add 在CopyOnWriteArrayList下标为index的位置插入一个元素 | ||
// 当index等于CopyOnWriteArrayList长度等同于append | ||
func (a *CopyOnWriteArrayList[T]) Add(index int, t T) (err error) { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
newItems := make([]T, n, n+1) | ||
copy(newItems, a.vals) | ||
newItems, err = slice.Add(newItems, t, index) | ||
a.vals = newItems | ||
return | ||
} | ||
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// Set 设置CopyOnWriteArrayList里index位置的值为t | ||
func (a *CopyOnWriteArrayList[T]) Set(index int, t T) error { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
if index >= n || index < 0 { | ||
return errs.NewErrIndexOutOfRange(n, index) | ||
} | ||
newItems := make([]T, n) | ||
copy(newItems, a.vals) | ||
newItems[index] = t | ||
a.vals = newItems | ||
return nil | ||
} | ||
|
||
// 这里不涉及缩容,每次都是当前内容长度申请的数组容量 | ||
func (a *CopyOnWriteArrayList[T]) Delete(index int) (T, error) { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
newItems := make([]T, len(a.vals)) | ||
copy(newItems, a.vals) | ||
res, t, err := slice.Delete(newItems, index) | ||
if err != nil { | ||
return t, err | ||
} | ||
newItems = res | ||
a.vals = newItems | ||
return t, nil | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Len() int { | ||
return len(a.vals) | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Cap() int { | ||
return cap(a.vals) | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Range(fn func(index int, t T) error) error { | ||
for key, value := range a.vals { | ||
e := fn(key, value) | ||
if e != nil { | ||
return e | ||
} | ||
} | ||
return nil | ||
} | ||
|
||
func (a *CopyOnWriteArrayList[T]) AsSlice() []T { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
res := make([]T, len(a.vals)) | ||
copy(res, a.vals) | ||
return res | ||
} | ||
// Copyright 2021 ecodeclub | ||
// | ||
// 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 list | ||
|
||
import ( | ||
"sync" | ||
|
||
"github.com/ecodeclub/ekit/internal/errs" | ||
"github.com/ecodeclub/ekit/internal/slice" | ||
) | ||
|
||
var ( | ||
_ List[any] = &CopyOnWriteArrayList[any]{} | ||
) | ||
|
||
// CopyOnWriteArrayList 基于切片的简单封装 写时加锁,读不加锁,适合于读多写少场景 | ||
type CopyOnWriteArrayList[T any] struct { | ||
vals []T | ||
mutex *sync.Mutex | ||
} | ||
|
||
// NewCopyOnWriteArrayList | ||
func NewCopyOnWriteArrayList[T any]() *CopyOnWriteArrayList[T] { | ||
m := &sync.Mutex{} | ||
return &CopyOnWriteArrayList[T]{ | ||
vals: make([]T, 0), | ||
mutex: m, | ||
} | ||
} | ||
|
||
// NewCopyOnWriteArrayListOf 直接使用 ts,会执行复制 | ||
func NewCopyOnWriteArrayListOf[T any](ts []T) *CopyOnWriteArrayList[T] { | ||
items := make([]T, len(ts)) | ||
copy(items, ts) | ||
m := &sync.Mutex{} | ||
return &CopyOnWriteArrayList[T]{ | ||
vals: items, | ||
mutex: m, | ||
} | ||
} | ||
|
||
func (a *CopyOnWriteArrayList[T]) Get(index int) (t T, e error) { | ||
l := a.Len() | ||
if index < 0 || index >= l { | ||
return t, errs.NewErrIndexOutOfRange(l, index) | ||
} | ||
return a.vals[index], e | ||
} | ||
|
||
// Append 往CopyOnWriteArrayList里追加数据 | ||
func (a *CopyOnWriteArrayList[T]) Append(ts ...T) error { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
newItems := make([]T, n, n+len(ts)) | ||
copy(newItems, a.vals) | ||
newItems = append(newItems, ts...) | ||
a.vals = newItems | ||
return nil | ||
} | ||
|
||
// Add 在CopyOnWriteArrayList下标为index的位置插入一个元素 | ||
// 当index等于CopyOnWriteArrayList长度等同于append | ||
func (a *CopyOnWriteArrayList[T]) Add(index int, t T) (err error) { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
newItems := make([]T, n, n+1) | ||
copy(newItems, a.vals) | ||
newItems, err = slice.Add(newItems, t, index) | ||
a.vals = newItems | ||
return | ||
} | ||
|
||
// Set 设置CopyOnWriteArrayList里index位置的值为t | ||
func (a *CopyOnWriteArrayList[T]) Set(index int, t T) error { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
n := len(a.vals) | ||
if index >= n || index < 0 { | ||
return errs.NewErrIndexOutOfRange(n, index) | ||
} | ||
newItems := make([]T, n) | ||
copy(newItems, a.vals) | ||
newItems[index] = t | ||
a.vals = newItems | ||
return nil | ||
} | ||
|
||
// 这里不涉及缩容,每次都是当前内容长度申请的数组容量 | ||
func (a *CopyOnWriteArrayList[T]) Delete(index int) (T, error) { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
var ret T | ||
n := len(a.vals) | ||
if index >= n || index < 0 { | ||
return ret, errs.NewErrIndexOutOfRange(n, index) | ||
} | ||
newItems := make([]T, len(a.vals)-1) | ||
item := 0 | ||
for i, v := range a.vals { | ||
if i == index { | ||
ret = v | ||
continue | ||
} | ||
newItems[item] = v | ||
item++ | ||
} | ||
a.vals = newItems | ||
return ret, nil | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Len() int { | ||
return len(a.vals) | ||
} | ||
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func (a *CopyOnWriteArrayList[T]) Cap() int { | ||
return cap(a.vals) | ||
} | ||
|
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func (a *CopyOnWriteArrayList[T]) Range(fn func(index int, t T) error) error { | ||
for key, value := range a.vals { | ||
e := fn(key, value) | ||
if e != nil { | ||
return e | ||
} | ||
} | ||
return nil | ||
} | ||
|
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func (a *CopyOnWriteArrayList[T]) AsSlice() []T { | ||
a.mutex.Lock() | ||
defer a.mutex.Unlock() | ||
res := make([]T, len(a.vals)) | ||
copy(res, a.vals) | ||
return res | ||
} |
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