pthread creates one extra thread

[Shesha Sreenivasamurthy <shesha@inostor.com>]

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


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