locker

locker/chan_source_locker.go

@@ -6,10 +6,17 @@ type ChanLocker interface {
 }
 
 type chanSourceLock struct {
-	m       RWLocker
+	m       rwLocker
 	content map[string]chan int
 }
 
+func NewChanSourceLocker() *chanSourceLock {
+	return &chanSourceLock{
+		m:       NewRWLocker(),
+		content: make(map[string]chan int),
+	}
+}
+
 func (s *chanSourceLock) Get(key string) (ch <-chan int, ok bool) {
 	s.m.RLock()
 	ch, ok = s.content[key]

locker/chan_source_locker_test.go

@@ -0,0 +1,19 @@
+package locker_test
+
+import (
+	"testing"
+
+	"github.com/charlienet/go-mixed/locker"
+)
+
+func TestChanSourceLocker(t *testing.T) {
+	l := locker.NewChanSourceLocker()
+	c, ok := l.Get("aaaa")
+	if ok {
+		<-c
+
+		println("ok")
+	}
+
+	println("fail")
+}

locker/distributed_locker.go

@@ -0,0 +1,7 @@
+package locker
+
+import "context"
+
+type DistributedLocker interface {
+	Unlock(context.Context, string)
+}

locker/distributed_locker_test.go

@@ -0,0 +1,13 @@
+package locker_test
+
+import (
+	"testing"
+
+	"github.com/charlienet/go-mixed/redis"
+	"github.com/charlienet/go-mixed/tests"
+)
+
+func TestRedisDistrbutedLocker(t *testing.T) {
+	tests.RunOnDefaultRedis(t, func(rdb redis.Client) {
+	})
+}

locker/readme.md

@@ -0,0 +1,22 @@
+同步锁
+
+EmptyLocker， 空锁
+RWLocker, 读写锁
+SpinLocker, 旋转锁
+
+
+锁可以添加一个外部存储成为分布式锁。WithRedis, WithZookeeper
+
+单例锁
+
+
+资源锁
+
+
+分布式锁
+在锁的基础上添加分布式存储升级为分布式锁 
+
+locker.WithRedis()
+locker.WithZookeeper()
+
+

locker/redis/redis_locker.lua

@@ -0,0 +1,33 @@
+#!lua name=charlie_locker
+
+-- 安装命令
+-- cat redis_locker.lua | redis-cli -x --cluster-only-masters --cluster call 192.168.123.30:6379 FUNCTION LOAD REPLACE
+
+local function lock(keys, args) 
+    if redis.call("GET", keys[1]) == args[1] then
+        redis.call("SET", keys[1], args[1], "PX", args[2])
+        return "OK"
+    else
+        return redis.call("SET", keys[1], args[1], "NX", "PX", args[2])
+    end
+end
+
+local function del(keys, args)
+    if redis.call("GET", keys[1]) == args[1] then
+        return redis.call("DEL", keys[1])
+    else
+        return '0'
+    end
+end
+
+local function expire(keys, args)
+    if redis.call('get', keys[1]) == args[1] then
+        return redis.call('expire', keys[1], args[2])
+    else
+        return '0'
+    end
+end
+
+redis.register_function('locker_lock',lock)
+redis.register_function('locker_unlock',del)
+redis.register_function('locker_expire',expire)

locker/redis/redis_store.go

@@ -0,0 +1,164 @@
+package redis
+
+import (
+	"context"
+	_ "embed"
+	"maps"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/charlienet/go-mixed/rand"
+	"github.com/charlienet/go-mixed/redis"
+	goredis "github.com/redis/go-redis/v9"
+)
+
+//go:embed redis_locker.lua
+var redis_locker_function string
+
+const (
+	defaultExpire = time.Second * 20
+	retryInterval = time.Millisecond * 10
+)
+
+var once sync.Once
+
+type redis_locker_store struct {
+	key     string
+	sources map[string]string
+	expire  time.Duration // 过期时间
+	mu      sync.RWMutex
+	clients []redis.Client
+}
+
+func NewRedisStore(key string, clients ...redis.Client) *redis_locker_store {
+	once.Do(func() { redis.Clients(clients).LoadFunction(redis_locker_function) })
+
+	locker := &redis_locker_store{
+		key:     key,
+		sources: make(map[string]string),
+		clients: clients,
+		expire:  defaultExpire,
+	}
+
+	go locker.expandLockTime()
+
+	return locker
+}
+
+func (l *redis_locker_store) Lock(ctx context.Context, sourceName string) error {
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+			if l.TryLock(ctx, sourceName) {
+				return nil
+			}
+		}
+
+		time.Sleep(retryInterval)
+	}
+}
+
+func (l *redis_locker_store) TryLock(ctx context.Context, sourceName string) bool {
+	value := l.getSourceValue(sourceName)
+
+	results := l.fCall(ctx, "locker_lock", sourceName, value, l.expire.Milliseconds())
+
+	if !isSuccess(results) {
+		for _, r := range results {
+			if r.Err() != nil {
+				println("err:", r.Err().Error())
+			}
+		}
+
+		l.Unlock(ctx, sourceName)
+		return false
+	}
+
+	return true
+}
+
+func (locker *redis_locker_store) Unlock(ctx context.Context, sourceName string) {
+	value := locker.getSourceValue(sourceName)
+	locker.fCall(ctx, "locker_unlock", sourceName, value)
+
+	locker.mu.Lock()
+	defer locker.mu.Unlock()
+
+	delete(locker.sources, sourceName)
+}
+
+func (l *redis_locker_store) expandLockTime() {
+	for {
+		time.Sleep(l.expire / 3)
+
+		if len(l.sources) == 0 {
+			continue
+		}
+
+		l.mu.RLock()
+		cloned := maps.Clone(l.sources)
+		l.mu.RUnlock()
+
+		for k, v := range cloned {
+			results := l.fCall(context.Background(), "locker_expire", k, v, l.expire.Seconds())
+			for _, r := range results {
+				if r.Err() != nil {
+					println("键延期失败:", r.Err().Error())
+				}
+			}
+		}
+	}
+}
+
+func (l *redis_locker_store) getSourceValue(name string) string {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+
+	if v, ok := l.sources[name]; ok {
+		return v
+	}
+
+	v := rand.Hex.Generate(36)
+	l.sources[name] = v
+	return v
+}
+
+func (locker *redis_locker_store) fCall(ctx context.Context, cmd string, key string, args ...any) []*goredis.Cmd {
+	results := make([]*goredis.Cmd, 0, len(locker.clients))
+
+	var wg sync.WaitGroup
+	wg.Add(len(locker.clients))
+	for _, rdb := range locker.clients {
+		go func(rdb redis.Client) {
+			defer wg.Done()
+
+			newKey := rdb.JoinKeys(locker.key, key)
+			results = append(results, rdb.FCall(ctx, cmd, []string{newKey}, args...))
+		}(rdb)
+	}
+
+	wg.Wait()
+
+	return results
+}
+
+func isSuccess(results []*goredis.Cmd) bool {
+	successCount := 0
+	for _, ret := range results {
+		resp, err := ret.Result()
+
+		if err != nil || resp == nil {
+			return false
+		}
+
+		reply, ok := resp.(string)
+		if ok && strings.EqualFold(reply, "OK") {
+			successCount++
+		}
+	}
+
+	return successCount >= len(results)/2+1
+}

locker/redis/redis_store_test.go

@@ -0,0 +1,31 @@
+package redis
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/charlienet/go-mixed/redis"
+	"github.com/charlienet/go-mixed/tests"
+)
+
+func TestCreateRedisStore(t *testing.T) {
+	tests.RunOnDefaultRedis(t, func(rdb redis.Client) {
+		keyName := "source"
+
+		l := NewRedisStore("locker_key", rdb)
+		ret := l.TryLock(context.Background(), keyName)
+		if !ret {
+			t.Log("加锁失败")
+		}
+
+		l.Lock(context.Background(), keyName)
+		t.Log("锁重入完成")
+
+		l.Unlock(context.Background(), keyName)
+
+		time.Sleep(time.Second * 15)
+
+		// l.Unlock(context.Background())
+	})
+}

locker/source_locker.go

@@ -1,27 +1,45 @@
 package locker
 
 import (
+	"context"
 	"fmt"
 	"sync/atomic"
+
+	redis_store "github.com/charlienet/go-mixed/locker/redis"
+	"github.com/charlienet/go-mixed/redis"
 )
 
 // 带计数器锁
 type countLocker struct {
-	Locker
+	rw    rwLocker
 	Count int32
 }
 
 // SourceLocker 资源锁
 type SourceLocker struct {
-	m     RWLocker
+	m                 RWLocker
-	locks map[string]*countLocker
+	distributedLocker DistributedLocker
+	locks             map[string]*countLocker
+	err               error
 }
 
 func NewSourceLocker() *SourceLocker {
-	return &SourceLocker{
+	l := &SourceLocker{
-		m:     NewRWLocker(),
 		locks: make(map[string]*countLocker),
 	}
+
+	l.m.Synchronize()
+	return l
+}
+
+func (s *SourceLocker) WithRedis(key string, clients ...redis.Client) *SourceLocker {
+	redisStore := redis_store.NewRedisStore(key, clients...)
+	return s.WithDistributedLocker(redisStore)
+}
+
+func (s *SourceLocker) WithDistributedLocker(distributed DistributedLocker) *SourceLocker {
+	s.distributedLocker = distributed
+	return s
 }
 
 func (s *SourceLocker) Lock(key string) {
@@ -31,7 +49,7 @@ func (s *SourceLocker) Lock(key string) {
 
 	if ok {
 		atomic.AddInt32(&l.Count, 1)
-		l.Lock()
+		l.rw.Lock()
 
 		fmt.Println("加锁")
 	} else {
@@ -40,18 +58,15 @@ func (s *SourceLocker) Lock(key string) {
 		if l2, ok := s.locks[key]; ok {
 			s.m.Unlock()
 
-			l2.Lock()
+			l2.rw.Lock()
 			fmt.Println("二次检查加锁")
 		} else {
-			n := NewLocker()
+			n := NewRWLocker()
-			s.locks[key] = &countLocker{Locker: n, Count: 1}
+			s.locks[key] = &countLocker{rw: n, Count: 1}
 
 			s.m.Unlock()
 
-			fmt.Printf("新锁准备加锁:%p\n", n)
 			n.Lock()
-
-			fmt.Println("初始加锁")
 		}
 	}
 }
@@ -61,8 +76,11 @@ func (s *SourceLocker) Unlock(key string) {
 
 	if l, ok := s.locks[key]; ok {
 		atomic.AddInt32(&l.Count, -1)
-		fmt.Printf("解锁%p\n", l)
+		l.rw.Unlock()
-		l.Unlock()
+
+		if s.distributedLocker != nil {
+			s.distributedLocker.Unlock(context.Background(), key)
+		}
 
 		if l.Count == 0 {
 			delete(s.locks, key)
@@ -75,18 +93,14 @@ func (s *SourceLocker) TryLock(key string) bool {
 	// 加读锁
 	s.m.RLock()
 	l, ok := s.locks[key]
-
+	s.m.RUnlock()
 	if ok {
-		ret := l.TryLock()
+		ret := l.rw.TryLock()
-		s.m.RUnlock()
-
 		return ret
 	} else {
-		s.m.RUnlock()
-
 		s.m.Lock()
-		n := NewLocker()
+		n := NewRWLocker()
-		s.locks[key] = &countLocker{Locker: n, Count: 1}
+		s.locks[key] = &countLocker{rw: n, Count: 1}
 		s.m.Unlock()
 
 		return n.TryLock()

locker/source_locker_test.go

@@ -1,19 +1,39 @@
-package locker
+package locker_test
 
 import (
 	"sync"
 	"testing"
 	"time"
+
+	"github.com/charlienet/go-mixed/locker"
+	"github.com/stretchr/testify/assert"
 )
 
 var sourcekey = "u-0001"
 
 func TestTryLock(t *testing.T) {
+	l := locker.NewSourceLocker()
+	l.Lock("aa")
 
+	assert.False(t, l.TryLock("aa"))
+	assert.True(t, l.TryLock("bb"))
+
+	defer l.Unlock("aa")
+}
+
+func TestM(t *testing.T) {
+	l := locker.NewSourceLocker()
+
+	for i := 0; i < 10000000; i++ {
+		l.Lock("aaa")
+		l.Unlock("aaa")
+	}
+
+	t.Logf("%+v", l)
 }
 
 func TestSourceLocker(t *testing.T) {
-	l := NewSourceLocker()
+	l := locker.NewSourceLocker()
 
 	c := 5
 	n := 0
@@ -41,7 +61,7 @@ func TestSourceTryLock(t *testing.T) {
 	wg := new(sync.WaitGroup)
 	wg.Add(c)
 
-	l := NewSourceLocker()
+	l := locker.NewSourceLocker()
 
 	for i := 0; i < c; i++ {
 		go func() {
@@ -61,7 +81,7 @@ func TestSourceTryLock(t *testing.T) {
 }
 
 func BenchmarkSourceLocker(b *testing.B) {
-	l := NewSourceLocker()
+	l := locker.NewSourceLocker()
 
 	b.RunParallel(func(p *testing.PB) {
 		for p.Next() {

locker/spin_locker_test.go

@@ -1,12 +1,14 @@
-package locker
+package locker_test
 
 import (
 	"sync"
 	"testing"
+
+	"github.com/charlienet/go-mixed/locker"
 )
 
 func TestSpinLock(t *testing.T) {
-	l := NewSpinLocker()
+	l := locker.NewSpinLocker()
 
 	n := 10
 	c := 0

locker/synchronizeable_test.go

@@ -0,0 +1,44 @@
+package locker_test
+
+import (
+	"testing"
+
+	"github.com/charlienet/go-mixed/locker"
+)
+
+func TestLocker(t *testing.T) {
+
+	var l locker.Locker
+
+	l.Synchronize()
+
+	l.Lock()
+	defer l.Unlock()
+}
+
+func TestNew(t *testing.T) {
+	var a locker.RWLocker
+	a.Synchronize()
+
+}
+
+func TestSpinLocker(t *testing.T) {
+	var l locker.SpinLocker
+	l.Synchronize()
+
+	l.Lock()
+	defer l.Unlock()
+}
+
+func TestRWLocker(t *testing.T) {
+	var l locker.RWLocker
+	l.Lock()
+}
+
+func TestPointLocker(t *testing.T) {
+	l := locker.NewLocker()
+	l.Lock()
+	l.Lock()
+
+	defer l.Unlock()
+}