2017-12-29 16:03:30 +08:00
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// Copyright 2017 gf Author(https://gitee.com/johng/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://gitee.com/johng/gf.
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//
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2017-12-31 18:19:58 +08:00
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2017-11-23 10:21:28 +08:00
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package gmap
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import (
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2019-01-12 23:36:22 +08:00
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"gitee.com/johng/gf/g/internal/rwmutex"
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)
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type IntBoolMap struct {
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m map[int]bool
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mu *rwmutex.RWMutex
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}
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2019-01-12 23:36:22 +08:00
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func NewIntBoolMap(unsafe...bool) *IntBoolMap {
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return &IntBoolMap{
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m : make(map[int]bool),
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mu : rwmutex.New(unsafe...),
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}
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}
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// 哈希表克隆
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func (this *IntBoolMap) Clone() map[int]bool {
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m := make(map[int]bool)
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this.mu.RLock()
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for k, v := range this.m {
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m[k] = v
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}
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this.mu.RUnlock()
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return m
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}
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2018-04-15 22:02:06 +08:00
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// 给定回调函数对原始内容进行遍历,回调函数返回true表示继续遍历,否则停止遍历
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func (this *IntBoolMap) Iterator(f func (k int, v bool) bool) {
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this.mu.RLock()
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defer this.mu.RUnlock()
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for k, v := range this.m {
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if !f(k, v) {
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break
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}
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}
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}
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// 设置键值对
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func (this *IntBoolMap) Set(key int, val bool) {
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this.mu.Lock()
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this.m[key] = val
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this.mu.Unlock()
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}
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// 批量设置键值对
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func (this *IntBoolMap) BatchSet(m map[int]bool) {
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this.mu.Lock()
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for k, v := range m {
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this.m[k] = v
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}
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this.mu.Unlock()
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}
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// 获取键值
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func (this *IntBoolMap) Get(key int) bool {
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this.mu.RLock()
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val, _ := this.m[key]
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this.mu.RUnlock()
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return val
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}
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2018-09-20 09:28:45 +08:00
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// 设置kv缓存键值对,内部会对键名的存在性使用写锁进行二次检索确认,如果存在则不再写入;返回键名对应的键值。
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// 在高并发下有用,防止数据写入的并发逻辑错误。
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func (this *IntBoolMap) doSetWithLockCheck(key int, value bool) bool {
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this.mu.Lock()
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if v, ok := this.m[key]; ok {
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this.mu.Unlock()
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return v
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}
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this.m[key] = value
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this.mu.Unlock()
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return value
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}
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// 当键名存在时返回其键值,否则写入指定的键值
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func (this *IntBoolMap) GetOrSet(key int, value bool) bool {
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this.mu.RLock()
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v, ok := this.m[key]
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this.mu.RUnlock()
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if !ok {
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return this.doSetWithLockCheck(key, value)
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} else {
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return v
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}
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}
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// 当键名存在时返回其键值,否则写入指定的键值,键值由指定的函数生成
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func (this *IntBoolMap) GetOrSetFunc(key int, f func() bool) bool {
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this.mu.RLock()
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v, ok := this.m[key]
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this.mu.RUnlock()
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if !ok {
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return this.doSetWithLockCheck(key, f())
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} else {
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return v
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}
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}
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// 与GetOrSetFunc不同的是,f是在写锁机制内执行
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func (this *IntBoolMap) GetOrSetFuncLock(key int, f func() bool) bool {
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this.mu.RLock()
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val, ok := this.m[key]
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this.mu.RUnlock()
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if !ok {
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this.mu.Lock()
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defer this.mu.Unlock()
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if v, ok := this.m[key]; ok {
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this.mu.Unlock()
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return v
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}
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val = f()
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this.m[key] = val
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return val
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} else {
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return val
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}
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}
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// 当键名不存在时写入,并返回true;否则返回false。
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func (this *IntBoolMap) SetIfNotExist(key int, value bool) bool {
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if !this.Contains(key) {
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this.doSetWithLockCheck(key, value)
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return true
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}
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return false
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}
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// 批量删除键值对
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func (this *IntBoolMap) BatchRemove(keys []int) {
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this.mu.Lock()
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for _, key := range keys {
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delete(this.m, key)
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}
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this.mu.Unlock()
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}
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// 返回对应的键值,并删除该键值
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func (this *IntBoolMap) Remove(key int) bool {
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this.mu.Lock()
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val, exists := this.m[key]
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if exists {
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delete(this.m, key)
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}
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this.mu.Unlock()
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return val
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}
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// 返回键列表
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func (this *IntBoolMap) Keys() []int {
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this.mu.RLock()
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keys := make([]int, 0)
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for key, _ := range this.m {
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keys = append(keys, key)
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}
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this.mu.RUnlock()
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return keys
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}
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// 返回值列表(注意是随机排序)
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//func (this *IntBoolMap) Values() []bool {
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// this.mu.RLock()
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// vals := make([]bool, 0)
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// for _, val := range this.m {
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// vals = append(vals, val)
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// }
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// this.mu.RUnlock()
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// return vals
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//}
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// 是否存在某个键
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func (this *IntBoolMap) Contains(key int) bool {
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this.mu.RLock()
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_, exists := this.m[key]
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this.mu.RUnlock()
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return exists
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}
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// 哈希表大小
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func (this *IntBoolMap) Size() int {
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this.mu.RLock()
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length := len(this.m)
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this.mu.RUnlock()
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return length
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}
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// 哈希表是否为空
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func (this *IntBoolMap) IsEmpty() bool {
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this.mu.RLock()
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empty := len(this.m) == 0
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this.mu.RUnlock()
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return empty
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}
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// 清空哈希表
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func (this *IntBoolMap) Clear() {
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this.mu.Lock()
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this.m = make(map[int]bool)
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this.mu.Unlock()
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}
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2018-09-06 14:48:55 +08:00
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// 并发安全锁操作,使用自定义方法执行加锁修改操作
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func (this *IntBoolMap) LockFunc(f func(m map[int]bool)) {
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this.mu.Lock(true)
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defer this.mu.Unlock(true)
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f(this.m)
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}
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2018-09-06 14:48:55 +08:00
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// 并发安全锁操作,使用自定义方法执行加锁读取操作
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func (this *IntBoolMap) RLockFunc(f func(m map[int]bool)) {
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this.mu.RLock(true)
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defer this.mu.RUnlock(true)
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f(this.m)
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}
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