[1.7] pthread_create block

[Thomas Stalder]

Hello,

Sometimes pthread_create block and never return.

I have made a simple program (test.c) to reproduce the problem.

> gcc test.c -lpthread -o test
> ./test
thread id=1
thread id=2
thread id=3
thread id=4
........
thread id=3736


Sometimes pthread_create block after creating arround 10 threads,
sometimes after creating arround 10000 threads or more.

The test program work well under linux.

--
Thomas

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


static pthread_mutex_t my_mutex = PTHREAD_MUTEX_INITIALIZER;
int nb_thread=0;

void *thread_func(void *parm)
{
        int id;
        pthread_mutex_lock(&my_mutex);
        nb_thread++;
        id = nb_thread;
        pthread_mutex_unlock(&my_mutex);
        printf("thread id=%d\n", id);
        pthread_exit(0);
        return NULL;
}

int main(void)
{
        while(1)
        {
                int err = 0;
                pthread_attr_t  attr;
                pthread_t thread_id;

                /*  Initialize the attribute */
                err = pthread_attr_init(&attr);
                if (err)
                {
                        printf("pthread_attr_init err=%d\n", err);
                }
                err = pthread_attr_setinheritsched(&attr, 
PTHREAD_INHERIT_SCHED);
                if (err)
                {
                        printf("pthread_attr_setinheritsched error\n");
                }

                err = 
pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED);
                if (err)
                {
                        printf("pthread_attr_setdetachstate error\n");
                }

                /*  Create the thread with our attribute */
//              printf("before pthread_create\n");
                err = pthread_create(&thread_id, &attr, thread_func, NULL);
                if (err)
                {
                        printf("pthread_create error\n");
                }       
//              printf("after pthread_create\n");
                pthread_attr_destroy(&attr);
        }
}

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