imageKeyLock, err := lock.ExclusiveKeyLock(ds.imageLockDir, key)iferr !=nil{returnfmt.Errorf("error locking image: %v", err) }deferimageKeyLock.Close()// Firstly remove aciinfo and remote from the db in an unique transaction.// remote needs to be removed or a GetRemote will return a...
rank lockRank){lock2(l)}funclock2(l*mutex){gp:=getg()ifgp.m.locks<0{throw("runtime·lock: lock count")}//g绑定的m的lock属性自增加一gp.m.locks++// 投机抢占锁 运气好抢到直接返回 不需要进行内核调用v:=atomic.Xchg(key32(&l.key),mutex_locked)ifv==mutex_unlocked...
Golang utility class KeyLock: lock by string key, so as to avoid giant lock - xiaonanln/keylock
Locked --> Unlocked: releaseLock(key) Locked --> [*]: timeout classDiagram class RedisLock { +acquireLock(key, timeout) +releaseLock(key) } class main { -key -timeout } main --> RedisLock 通过以上代码示例和图示,我们可以清晰地了解如何使用Golang和Redis实现分布式锁,并且防止死锁的发生。...
client.Del(ctx, key) } } 缺点:不能自动展期,当业务处理时间超过锁定时长时,会被其他业务或客户端拿到锁,造成并发。 加个自动续期 funcLockGoRedis(keystring, valstring, secint, autoDelaybool)bool{ mutex.Lock()defermutex.Unlock() client := redis2.NewClient(&redis2.Options{ ...
-- previously set lock's tokens. -- 判断某个Key是否已经被占用了, 如果是自己占用的, 那么则可以尝试覆盖 local function canOverrideKeys() local offset = tonumber(ARGV[2]) for _, key in ipairs(KEYS) do if redis.call("getrange", key, 0, offset-1) ~= string.sub(ARGV[1], 1, offset...
val := delByKeyWhenValueEquals(ctx, rdb, lockK, lockV) fmt.Println(tag+"释放结果:", val) } // 释放锁 func delByKeyWhenValueEquals(ctx context.Context, rdb *redis.Client, key string, value interface{}) bool { lua := ` -- 如果当前值与锁值一致,删除key ...
}// Set 添加 key-valuefunc(m ConcurrentHashMap)Set(keystring, valueinterface{}) {// Get map shard.shard := m.GetShardMap(key) shard.Lock() shard.items[key] = value shard.Unlock() } // Get 返回指定key的value值func(m ConcurrentHashMap)Get(keystring) (interface{},bool) { ...
Lock typeLockstruct{*Client keys[]stringvaluestringtokenLenint} 需要稍微注意下的是tokenLen, 因为实际的Key对应的Value是Token + Metadata, 所以在校验的时候不能直接获取value判断而是前缀判断. metadata可以设置一些和服务实例相关的信息, 这部分的设计还有有考虑的. ...
net/http: do not enable HTTP/2 extended connect by default #71128 closed Jan 21, 2025 x/net/http2: pseudo header :protocol can not appear after regular header fields #70728 closed Jan 21, 2025 x/time/rate: Rate limit can be exceeded 5000x under high lock contention due to bug...