[asterisk-dev] Newbie question about ast_pthread_create_background

[Alex Massover]

Hi!

I' m trying to build a new application (based on app_skel). The application should get data and send  it to the remote server  in a background (without blocking the dailplan).

I have a structure with strings:

struct thread_arg {
        char *val1;
        char *val2;
        char *val3;

....
In app_exec(struct ast_channel *chan, void *data):
I populate the struct members by parsing commandline arguments and by calling to pbx_builtin_getvar_helper().
struct thread_arg targs;
targs.val1=(char *)pbx_builtin_getvar_helper(chan, "SIPCALLID");
                ...

Now I create a detached thread and exit from app_exec():
        pthread_t thread;
        ast_pthread_create_background(&thread,NULL,&thread_function, &targs);
        ast_module_user_remove(u);
        return res;

The detached thread sends the structure to the remove server and writes a log with ast_log():
void* thread_function (void* targs)
{
        struct thread_arg * pargs = (struct thread_arg *) targs;
        ast_log(LOG_ERROR, "in the thread %s \n", pargs->val1);
....
            [send to remote server here]
            [log result here]
....


The problem is that pargs structure in the thread "destroyed" (contains garbage) from the moment that app_exec() exits and it exits just after creating detached thread. If I put sleep() before exiting from app_exec() everying OK, but the whole idea is to be not blocking. I probaly missing something very basic here.
Please point me to how I can pass the structure to the detached thread and "keep it there" and been able to exit from app_exec().



--
Best Regards,
Alex Massover

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