thread-local

I have an instance of a class (lets call it A) which serves some threads, this instance only sends UDP packets via the UdpClient class. It initialize the the UdpClient in its constructor and only serves to send the packets. It looks something like: public class A{ private UdpClient m_Client; public class A(string host, int port){ m_Client = new UdpClient(host, port); } public void Send(string dataToSend){ var data= encoding.GetBytes(dataToSend); client.BeginSend(data, data.Length, null, null); } } My questions is: I know that UdpClient isn't thread-safe (according to MSDN documentation), what

I'm writing a servlet that handles each request by accessing and modifying some table(s) in the database. I want the connections to the database to be thread safe. I don't want to use already existing libraries/frameworks for this (spring, hibernate, etc.). I know I can use java's ThreadLocal for this in the following way : public class DatabaseRegistry { //assume it's a singleton private Properties prop = new Properties(); public static final ThreadLocal<Connection> threadConnection = new ThreadLocal<Connection>(); private Connection connect() throws SQLException { try { // This will load the

The C++11 standard contains a new addition - the thread_local specifier - which makes static variables thread-local. The standard thread_local supports non-trivial types - those with constructors and destructors. GCC unfortunately supports only trivial types via __thread specifier provided as extension. Is there's a way to emulate thread_local on top of __thread ? The implementation of __thread is very fast (equivalent to regular variable plus two indirections), so I want to avoid library functions in the hot path. I'm using GCC and Linux. Portability is not required. no. gcc does currently

I am having some trouble figuring out how pthread_key_t and pthread_key_create work. From my understand, each thread has TLS (thread local storage) and that a key is used to access the thread local storage. What I do not get is when a key is created, does every thread get to use it? Lets say Thread 0 creates key 0, can Thread 1 then use key 0? If Thread 1 used key 0, would it access its own TLS or Thread 0's TLS? Is there some global array or something that keeps track of all the keys being used? pthread_keys are just what you said, thread local storage referred to by a common key. So multiple

import java.util.concurrent.Executors import scala.concurrent.{ExecutionContext, Future} object TestInheritableThreadLocal { def main(args: Array[String]): Unit = { implicit val ec = ExecutionContext.fromExecutor(Executors.newFixedThreadPool(2)) val tl: InheritableThreadLocal[String] = new InheritableThreadLocal[String]() tl.set("InitialValue") Future { println("111 " + Thread.currentThread() + tl.get()) Future { println("222 " + Thread.currentThread() + tl.get()) } } Thread.sleep(3000) Future { tl.set("NewInitialValue") println("333 " + Thread.currentThread() + tl.get()) Future { println("444