Re: Waiting for a Spawn'ed process

[Sharad Gupta]

If you start the worker with spawnLinked then you will receive 
a LinkTerminated message.

import std.stdio;
import std.concurrency;
import core.thread;

void main()
{
    auto worker = spawnLinked(&workerFunc);

    // Wait for worker to terminate
    bool terminated = false;
    while (!terminated) {
        writeln("Waiting for the worker to terminate...");

        terminated = receiveTimeout(1.seconds,
            (LinkTerminated e) {
                if (e.tid == worker) {
                    writefln("Terminated");
                }
            }
        );
    }
}

void workerFunc()
{
    Thread.sleep(3.seconds);
}

Ali

But this is another spawned process. How can I tell this second 
process to wait on the first one.

eg:

auto processA = spawnLinked(funcA);
auto processB = spawnLinked(funcB);

funcA()
{
  doSomething();
}

funcB()
{
  doSomething();
  // wait for A
  doSomethingElse();
}

This is a simplified example, the real case two process would be 
spawned irrespective to each other. the second process could may 
also be launched by when the first is already done.