pthread creates one extra thread

[Shesha Sreenivasamurthy <shesha@xxxxxxxxxxx>]

Hi All,
  I Have the following small code for creating threads.

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

void my_func_1 (void *arg) {
        while(1) {}
 }


int main() {
  pthread_t thread_1;
  pthread_create(&thread_1, NULL,(void*)& my_func_1, NULL);

  while(1) { }
  exit(0);
}

gcc -lpthread -o thread test.c

I expect to have created 2 threads. But when I do ps -ef | grep thread I 
see 3.
Say If i use pthread_create and create one more thread, then instead of 
3 I see
4. Does any one know what is the reason for this behavior?

Any help is highly regarded.

-Shesha


--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive:       http://mail.nl.linux.org/kernelnewbies/
FAQ:           http://kernelnewbies.org/faq/