#include "errno.h" 
#include "stdio.h" 
#include "stdlib.h" 
#include "time.h" 
#include <pthread.h>
#include "unistd.h"
int a=0;
pthread_mutex_t hMutex = PTHREAD_MUTEX_INITIALIZER; 
void  *
threadFunc1(void *arg) 
{ 
      
        while(1) 
        { 
                pthread_mutex_lock(&hMutex); 
        (void)printf("aaa");
                usleep(10);
        a++;
        printf("%d",a);
               pthread_mutex_unlock(&hMutex); 
                pthread_yield(); 
        } 
        return 0; 
} 
  
void  *
threadFunc2(void *arg) 
{ 
      
        while(1) 
        { 
               pthread_mutex_lock(&hMutex); 
                usleep(5); 
                (void)printf("bbb\n");
        a++;
        printf("%d",a);
        pthread_mutex_unlock(&hMutex); 
                pthread_yield(); 
        } 
        return 0; 
} 
int main(void) 
{ 
        pthread_t tid1, tid2; 
      printf("ccc"); 
        pthread_setconcurrency(3); 

        pthread_create(&tid1, NULL, threadFunc1, NULL); 
       pthread_create(&tid2, NULL, threadFunc2, NULL); 
      fflush(NULL);

        while(1)
    {
        usleep(1000);
        fflush(NULL);    
    }


        return 0; 
}