After working through multiple incorrect solutions to the single-buffer-slot producer/consumer problem, we have finally settled on the following code with some key new insights including: using condition variables to signal when the buffer is filled and when it has been emptied, and using a while loop instead of an if statement when checking if there is something in the buffer (i.e., the value of count).

int loops;
cond_t cond;
mutex_t mutex;
void *producer(void *arg) {
  int i;
  for (i = 0; i < loops; i++) {
    Pthread_mutex_lock(&mutex);
    while (count == 1)
      Pthread_cond_wait(&cond, &mutex);
    put(i);
    Pthread_cond_signal(&cond);
    Pthread_mutex_unlock(&mutex);
  }
}
void *consumer(void *arg) {
  int i;
  for (i = 0; i < loops; i++) {
    Pthread_mutex_lock(&mutex);
    while (count < 2)
      Pthread_cond_wait(&cond, &mutex);
    int tmp = get();
    Pthread_cond_signal(&cond);
    Pthread_mutex_unlock(&mutex);
    printf("%d\n", tmp);
  }
}

Which of the following is true about our code?