Re: Runtime error when calling a callback in a parallel Task

[Ali Çehreli via Digitalmars-d-learn]

On 09/15/2015 04:49 PM, BBasile wrote:
Under Windows this works fine but under Linux I got a runtime error.

Can it be because 'param' is invalid at the time clbck is called? The 
following program works under Linux. However, removing thread_joinAll() 
is a bug:

import std.parallelism;
import std.stdio;

alias CallBack = void function(void*);

class Foo
{
    CallBack clbck;
    void* param;
    void dotask()
    {
        // some heavy processing
        // tells the caller that some fresh data are available
        if(clbck) clbck(param);  // debugger breaks HERE
    }

    void call()
    {
        task(&dotask).executeInNewThread;
        // returns directly but the caller will get a notif when finished
    }
}

void handler(void* p)
{
    writefln("Finishing with %s at %s", *(cast(int*)p), p);
}

void main()
{
    auto foo = new Foo();
    foo.clbck = &handler;
    int i = 42;
    foo.param = &i;
    foo.call();

    import core.thread;
    thread_joinAll();
}

Ali