public async Threading.Tasks.Task <IDisposable> LockSeedAsync(TimeSpan timeout)
{
if (!await _sema.WaitAsync(timeout))
{
SimpleLockItem.TimeoutError(Convert.ToString(this.Key), timeout);
}
return(_releaseItem);
}
public IDisposable LockSeed(TimeSpan timeout)
{
if (!_sema.Wait(timeout))
{
SimpleLockItem.TimeoutError(Convert.ToString(this.Key), timeout);
}
return(_releaseItem);
}
/// <summary>
/// 实现一个 Redis 锁的功能。
/// </summary>
/// <param name="client">Redis 客户端。</param>
/// <param name="key">锁的键名。</param>
/// <param name="timeout">锁的超时设定。</param>
/// <returns>释放时解除占用的锁。</returns>
/// <exception cref="System.TimeoutException">获取锁超时。</exception>
public static IDisposable Lock(this IRedisClient client, string key, TimeSpan?timeout = null)
{
if (client == null)
{
throw new ArgumentNullException(nameof(client));
}
if (string.IsNullOrWhiteSpace(key))
{
throw new ArgumentNullException(nameof(key));
}
var realSpan = timeout ?? DefaultLockTimeout;
if (!SpinWait.SpinUntil(() => client.HSet(LockKey, key, 1, nx: true), realSpan))
{
SimpleLockItem.TimeoutError(key, realSpan);
}
return(new SimpleLockItem(() => client.HDel(LockKey, key)));
}