Thread Creation failing

Hi all
i have a small program written something lke this.

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

void *dummy(void *arg)
{

}

int main()
{
pthread_t tid;
int i=0
while(i<1024)
{
pthread_create(&tid, NULL,&dummy, NULL)
i++;
printf("i = %d\n", i);
pthread_exit(tid);
}
}

In this i am creating a thread and exiting the thread also.
After 1024 times i am getting error in creating the thread with ernno as 12 --ERRNOMEM.
why is this happenning??
can any one help me?

Thanks in advance
Arun KA

Hi,

Uh, I'm not sure what results you are getting but that code terminates during the first loop iteration. After printing out your "i = %d\n" line you call the pthread_exit(tid) function. This will nuke your main thread without ever executing multiple times.

Given that sample code, I don't see how you could have ever tested out 1024 thread creations. If you simply did a typo and meant for the pthread_exit() function to be called from your dummy() function, then I can see how you can get 1024 iterations of your loop.

I played around a little with your code presuming that you had intended for the pthread_exit() function to be called from within the dummy() function. On my test system here at work it seemed to work correctly. (Redhat 9 distro) however I have experienced your error condition in the past using a Fedora Core 4 distro. I traced it down to what looks like memory leaks in the libraries. The only way I could recover that memory was to re-boot my system.

It may be that.

I hope that this helps!