threads cleanup?

[Krassimir Slavchev]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

Most probably I missed something.
I have problems with threads cleanup. Here are output of valgrind and
simple test program:

...
==78317== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==78317== malloc/free: in use at exit: 4108 bytes in 2 blocks.
==78317== malloc/free: 5 allocs, 3 frees, 4324 bytes allocated.
==78317==
==78317== searching for pointers to 2 not-freed blocks.
==78317== checked 1468040 bytes.
==78317==
==78317== 12 bytes in 1 blocks are still reachable in loss record 1 of 2
==78317==    at 0x3C038183: malloc (in
/usr/local/lib/valgrind/vgpreload_memcheck.so)
==78317==    by 0x3C03F8D0: (within /usr/local/lib/valgrind/libthr.so.2)
==78317==    by 0x3C040F49: pthread_mutex_init (in
/usr/local/lib/valgrind/libthr.so.2)
==78317==    by 0x3C040FA9: pthread_mutex_lock (in
/usr/local/lib/valgrind/libthr.so.2)
==78317==
==78317==
==78317== 4096 bytes in 1 blocks are still reachable in loss record 2 of 2
==78317==    at 0x3C038183: malloc (in
/usr/local/lib/valgrind/vgpreload_memcheck.so)
==78317==    by 0x3C121AE5: __smakebuf (in /lib/libc.so.6)
==78317==    by 0x3C1219B0: __swsetup (in /lib/libc.so.6)
==78317==    by 0x3C11789B: __vfprintf (in /lib/libc.so.6)
...

#include <stdio.h>
#include <pthread.h>

void *Worker(void * flags)
{
 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
 pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);

 printf("Worker started!\n");
 sleep(1);
 printf("Worker finiched!\n");
 *(int *)flags = 1;
 for(;;) {
  printf("pthread_testcancel()!\n");
  pthread_testcancel();
  sleep(1);
 }
}

int main()
{
 pthread_t tid, tid2;
 void * arg;

 arg = (int *)malloc(sizeof(int));
 *(int *)arg = 0;

 pthread_create(&tid, NULL, Worker, arg);

 for(;;) {
	if(*(int *)arg) {
		printf("pthread_cancel()!\n");
		pthread_cancel(tid);
		free(arg);
		pthread_exit((void *)0);
	}
  sleep(1);
 }
}

Any hints?

Best Regards

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (FreeBSD)

iD8DBQFIEE0UxJBWvpalMpkRAjluAKCpkMLNnK5+/Wwz0jAmdnqi6O1zyACeNf1F
kJHy5JX5fLb3rLFwq/Mis74=
=oBmp
-----END PGP SIGNATURE-----