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my-distributed-lock

There is a newer version: 1.2.2

-- Set a distributedLock
--  如果获取锁成功，则返回 1
local key     = KEYS[1]
local content = KEYS[2]
local ttl     = ARGV[1]
local lockSet = redis.call('setnx', key, content)
if lockSet == 1 then
  redis.call('pexpire', key, ttl)
else
  -- 如果value相同，则认为是同一个线程的请求，则认为重入锁
  local value = redis.call('get', key)
  if(value == content) then
    lockSet = 1;
    redis.call('pexpire', key, ttl)
  end
end
return lockSet