[asterisk-dev] Running a thread

[MohammedShehzad]

Hello every body,

I am facing some problems in some custom changes in rtp.c file in which have
used some threading functions.
I create a thread in ast_rtp_new_with_bindaddr function as below:

            pthread_attr_t attr;
            rtp->thread_var=NULL;
            pthread_attr_init(&attr);
            ast_pthread_create_background(&rtp->thread_var,&attr,
somecustom_thread,(void *)rtp);
            pthread_attr_destroy(&attr);

Thread of "somecustom_thread" is being created, which continue in while loop
(i.e. while(1))
I destroy this thread in ast_rtp_stop function with below line:
pthread_cancel(rtp->thread_var);
*
*My function works very fine in normal one-two calls. But when I put the
modified asterisk in regression/stress testing (test with many calls of
20-30 second duration for long run), I finds the memory leaks as below under
Valgrind:
==19707== 98,320 bytes in 683 blocks are possibly lost in loss record 39 of
41
==19707==    at 0x4004864: calloc (vg_replace_malloc.c:279)
==19707==    by 0xB09109: _dl_allocate_tls (in /lib/ld-2.7.so)
==19707==    by 0xCA9BFE: pthread_create@@GLIBC_2.1 (in /lib/
libpthread-2.7.so)
==19707==    by 0x812276E: ast_pthread_create_stack (utils.c:910)
==19707==    by 0x80EE60A: ast_rtp_new_with_bindaddr (rtp.c:2124)
==19707==    by 0x4AD8D0E: sip_alloc (chan_sip.c:4677)
==19707==    by 0x4ADA318: find_call (chan_sip.c:4848)
==19707==    by 0x4B152DA: sipsock_read (chan_sip.c:16485)
==19707==    by 0x80C11B9: ast_io_wait (io.c:279)
==19707==    by 0x4B164D6: do_monitor (chan_sip.c:16772)
==19707==    by 0x8122526: dummy_start (utils.c:856)
==19707==    by 0xCA950A: start_thread (in /lib/libpthread-2.7.so)

*
*
This seems to be a problem with pthread library, but it only occurs which I
do regression testing.
My question is that what is the mistake in creating and destroying the
thread.
If the there is a mistake in my code of creating the thread, please let me
know.
If any body know better option to run the thread just after RTP media starts
and stop the thread when RTP media stop, please point me into that
direction.

Thanks in advance.
*
*
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