Multithreading, C#

Multithreading

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

pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t condition_var = PTHREAD_COND_INITIALIZER;

void *function1 (void *data);
void *function2 (void *data);

int
main ()
{
  pthread_t thread1, thread2;

pthread_create (&thread1, NULL, &function1, NULL);
  pthread_create (&thread2, NULL, &function2, NULL);

pthead_join (thread1, NULL);
  pthread_join (thread2, NULL);

return 0;
}

// Write numbers 1-3 and 8-10 as permitted by function2()

void *
function1 (void *data)
{
  for (;;)
    {
      // Lock mutex and wait for signal to release the mutex
      pthread_mutex_lock (&count_mutex);
      
      // Wait while function2 operates on count
      // mutex unlock if condition variable in function2 signaled

pthead_cond_wait (&condition_var, &count_mutex);
      count++;
      printf("Counter value functionCount1: %d\n",count);
      pthread_mutex_unlock( &count_mutex );
      
      if(count >= COUNT_DONE) return(NULL);
    }
}

// Write numbers 4-7
void *function2(void *data)
{
    for(;;)
    {
       pthread_mutex_lock( &count_mutex );
       if( count < COUNT_HALT1 || count > COUNT_HALT2 )
       {
          // Condition of if statement has been met.
          // Signal to free waiting thread by freeing the mutex.
          // Note: functionCount1() is now permitted to modify "count".
          pthread_cond_signal( &condition_var );
       }
       else
       {
          count++;
          printf("Counter value functionCount2: %d\n",count);
       }
       pthread_mutex_unlock( &count_mutex );
       if(count >= COUNT_DONE) return(NULL);
    }
}


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