#include <stdio.h> 
#include <pthread.h> 
int data_ready = 0; 
int inf = 0; 
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; 
pthread_cond_t condvar = PTHREAD_COND_INITIALIZER; 
void *consumer (void * notused) 
{ 
printf("Eto potrebitel \n"); 
while(1) { 
pthread_mutex_lock (&mutex); 
printf("W1 \n"); 
while (!data_ready) {
printf("W2 \n"); 
pthread_cond_wait (&condvar, & mutex); 
printf("W3 \n"); 
}
printf("dannie ot proizv = %d \n",inf); 
data_ready=0; 
pthread_cond_signal(&condvar); 
pthread_mutex_unlock(&mutex); 
}
}
 
void *producer (void * notused) 
{ 
printf("Eto ptoizvoditel \n"); 
while(1) {
sleep(2); 
printf("ptoizvoditel polychil dannie ot h/w = %d \n",inf); 
pthread_mutex_lock (&mutex); 
printf("Wp1 \n"); 
while (data_ready) {
printf("Wp2 \n"); 
pthread_cond_wait (&condvar, & mutex); 
} 
data_ready=1; 
inf++;
printf("Wp3 \n"); 
pthread_cond_signal(&condvar); 
pthread_mutex_unlock(&mutex); 
} 
}
 
int main() 
{
printf("Start \n"); 
pthread_create(NULL,NULL, consumer,NULL); 
pthread_create(NULL,NULL, producer,NULL); 
sleep(10); 
return 0;
}