On date Monday 2008-09-08 10:31:43 +0200, Stefano Sabatini wrote:
> On date Monday 2008-09-08 10:08:39 +0200, Stefano Sabatini wrote:
> > On date Friday 2008-09-05 12:10:10 +0200, Stefano Sabatini wrote:
> > > On 9/5/08, Stefano Sabatini <[EMAIL PROTECTED]> wrote:
> > > > Hi all,
> > > >
> > > > I have a multithreaded application, and I need to run the sofia-sip
> > > > event loop not in the main process context, but in the context of a
> > > > thread.
> > > >
> > > > I implemented it this way.
> > > > I implemented a method Run() which instantiates the thread instance
> > > > and makes it execute su_root_run(), and a Stop() method which
> > > > executes su_root_break() and wait for the thread termination.
> > > >
> > > > Unfortunately this approach seems not to work, as I get this message
> > > > from the sofia stack:
> > > > nua(0x8729740): signal r_invite
> > > > SIPEngineTest: su_base_port.c:322: su_base_port_run: Assertion
> > > > `su_port_own_thread(self)' failed.
> > > >
> > > > and the process gets terminated by the SIGABRT signal.
> > > >
> > > > I'm currently stuck with it, can someone help/provide some hint?
> > >
> > > Do I need to use the interface defined in su_wait.h?
> > > I was using the functions provided in another library for managing
> > > threading.
> >
> > Well I read the documentation for su_wait.h but I stll can't figure
> > out how to use it.
> >
> > Since there is no way to create explicitly a thread, I think the
> > nearest think to the thread concept is the task, then I can't see any
> > reference to mutexes so I have no idea about how synchronization may
> > work here (mmh well should I use messages for that?).
> >
> > Please can someone suggest just a simple way to use the sofia API to
> > create and run a thread?
>
> Here it is my first attempt at sofia threading:
[...]
New try using su_task_execute this time.
----------------------8<-------------------------------------
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
/* this defines the kind of magic to pass to the handler, contains the
application context */
#define SU_ROOT_MAGIC_T void
#include <sofia-sip/su.h>
#include <sofia-sip/su_wait.h>
int task_function(void* opaque) {
int i;
printf("click clack click clack...\n");
for (i=10; i > 0; i--) {
sleep(1);
printf("%d...\n", i);
}
printf("BOOM...\n");
return 0;
}
int main (int argc, char *argv[])
{
su_root_t *root;
/* Initialize Sofia-SIP library and create event loop */
su_init();
root = su_root_create(NULL); /* create a root object, don't pass to it any
context */
/* enable threading, now su_clone_start will start a new thread */
if (!su_root_threading(root, 1)) {
fprintf(stderr, "Failed to activate threading\n");
exit(1);
}
su_task_r task;
su_task_init(task); /* init the task */
int task_ended = 0;
if (su_task_execute(task, &task_function, NULL, &task_ended) < 0) {
fprintf(stderr, "Failed to execute the task\n");
exit(1);
}
printf("main process thread...\n");
/* how can I understand when the task thread is terminated?
* for now it will continue forever... */
while (1)
sleep(1);
/* Destroy allocated resources */
su_root_destroy(root);
/* how to notify the main thread of the termination of the task thread? */
su_task_deinit(task);
su_deinit();
exit(0);
}
----------------------8<-------------------------------------
This always crashes with this backtrace:
(gdb) r
[Thread debugging using libthread_db enabled]
[New Thread 0xb7a576b0 (LWP 24551)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7a576b0 (LWP 24551)]
0xb7ed4d84 in su_port_own_thread (self=0x0) at su_port.h:332
(gdb) bt
#0 0xb7ed4d84 in su_port_own_thread (self=0x0) at su_port.h:332
#1 0xb7ed4d20 in su_task_execute (task=0xbfd724a8, function=0x80486f4
<task_function>, arg=0x0, return_value=0xbfd724a4) at su_root.c:338
#2 0x080487ec in main () at su-thread4.c:42
Ideas?
TIA, regards (and sorry for the mails flood).
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