Swift NSLock.lock（）在已持有锁的情况下执行？
我正在查看一些Alamofire检索器代码：Swift NSLock.lock（）在已持有锁的情况下执行？,swift,closures,alamofire,nslock,Swift,Closures,Alamofire,Nslock,我正在查看一些Alamofire检索器代码： func should(_ manager: SessionManager, retry request: Request, with error: Error, completion: @escaping RequestRetryCompletion) { lock.lock() ; defer { lock.unlock() } if let response = request.task.response
func should(_ manager: SessionManager, retry request: Request, with error: Error, completion: @escaping RequestRetryCompletion) {
lock.lock() ; defer { lock.unlock() }
if let response = request.task.response as? HTTPURLResponse, response.statusCode == 401 {
requestsToRetry.append(completion)
if !isRefreshing {
refreshTokens { [weak self] succeeded, accessToken, refreshToken in
guard let strongSelf = self else { return }
strongSelf.lock.lock() ; defer { strongSelf.lock.unlock() }
...
}
}
} else {
completion(false, 0.0)
}
}
lock.lock（）refreshTokensstrongSelf.lock.lock（）如果在执行
延迟shouldstrongSelf.lock.lock（）锁（）unlock（）@escapingreshTokensresponseJSONshouldrefreshttokensunlock