Re: dont understand this

[rikki cattermole via Digitalmars-d]

On 25/09/2016 10:24 AM, collerblade wrote:
fellow D programmers
I would like to ask a question! I would like to create a class, which
works in a separated thread, while the class exisit. This is important.
I want to kill/terminate/stop the third whenn the class get cleared.
Thas what i got so far. This is what i got so far (very easy solution):

class MyClass {
    public:
        this() {
            Thread thread=new Thread(&threadFunc);
            running=true;
            thread.start();
        }

        ~this() {
            writeln(someVariable);
            running=false;
        }

    private:
        bool running=false;
        int someVariable=1;

        void threadFunc() {
            while(running) {
                someVariable++;
            }
        }
}

Becouse core.thread.Thread doesnt have any stop,pause,therminate method
i have to stop the thread by myself (with the help of the running
variable). The problem is: this ISNT WORKING. The reason is: the
destructor never gets called, so the thread runs forever (application
didnt exit). So the GC finds somewhere a pointer to the class's instance
memory (which is ok i think, becouse i use delegate to create the thread).
But imagagine this: when i change the running variable to static,
everything works as expected, and the app frees and closes normally. Why
is the running variable is different from the other someVariable??
Before u ask:
- "shared bool running" doesnt works, only static.
- Tried to keep a reference of the Thread as a local variable, result is
the same
- i tried 1000 times the code on 2 different PC, result is the same (no
random pointer somewhere)
- i use latest LDC

Obviously, i want to avoid a static running variable, my class can have
multiple instances.

Ty Collerblade

threadFunc contains a reference to MyClass in the form of the 'this' 
pointer and so the GC sees this and never deallocates the MyClass 
instance to begin with.