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

const int NUM_THREADS=5;

void* runner(void *param);

int main(int argc, char *argv[]) { 
   int i, scope;
   pthread_t tid[NUM_THREADS]; 
   pthread_attr_t attr; 
   /* get the default attributes */ 
   pthread_attr_init(&attr); 
   /* first inquire on the current scope */
   if (pthread_attr_getscope(&attr, &scope) != 0) 
      fprintf(stderr, "Unable to get scheduling scope\n"); 
   else { 
      if (scope == PTHREAD_SCOPE_PROCESS) 
         printf("PTHREAD_SCOPE_PROCESS\n"); 
      else if (scope == PTHREAD_SCOPE_SYSTEM) 
         printf("PTHREAD_SCOPE_SYSTEM\n"); 
      else
        fprintf(stderr, "Illegal scope value.\n"); 
   } 
   /* set the scheduling algorithm to PCS or SCS */ 
   if ((scope = pthread_attr_setscope(&attr, PTHREAD_SCOPE_PROCESS)) != 0)
		perror("PTHREAD_SCOPE_PROCESS"); 
	printf("scope=%d errno=%d\n", scope, errno);
   /* create the threads */
   for (i = 0; i < NUM_THREADS; i++) 
      pthread_create(&tid[i],&attr,runner,NULL); 
   /* now join on each thread */
   for (i = 0; i < NUM_THREADS; i++) 
      pthread_join(tid[i], NULL); 
} 
/* Each thread will begin control in this function */ 
void *runner(void *param)
{ 
   printf("See how this works\nAnd this...\n");
   /* do some work ... */ 
   pthread_exit(0); 
}