JM <[email protected]> writes:
> Hi all
> I just played around with closures as thread functions. I'm not sure if
> this example is supposed to work, but at least it compiles.
>
>
> class HHH : Object {
> public void run() {
> string test = "test";
> try {
> Thread.create( ()=> { print("in thread : %s \n", test);
> }, false);
Hi
if you look into a hhh.c generated with
valac -C --thread hhh.vala
you can see that the clause data is destroyed at the end of HHH.run
(hhh_run in C) as the closure function is no longer referenced when
exiting HHH.run, you have to assign the closure to a variable to keep
it alive, for example
class HHH : Object {
ThreadFunc f;
public void run() {
string test = "test";
try {
f = ()=> { Thread.usleep(1000); print("in thread : %s \n",
test); };
Thread.create(f, false);
it gives a compilation warning but works (I needed to add usleep to observe
your problem)
$ valac --thread --pkg posix temp.vala
hhh.vala.c: In function ‘hhh_run’:
hhh.vala.c:111: warning: assignment from incompatible pointer type
>
> Anybody knows how this should be handled?
> Regards
> Jörn
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