os_labs/lab13/testing.ic

#pragma once
#include <unistd.h>

void queue_test() {
  int i;
  int item;
  int length = 128;

  Queue *queue = make_queue(length);
  assert(queue_empty(queue));
  for (i = 0; i < length - 1; i++) {
    queue_push(queue, i);
  }
  assert(queue_full(queue));
  for (i = 0; i < 10; i++) {
    item = queue_pop(queue);
    assert(i == item);
  }
  assert(!queue_empty(queue));
  assert(!queue_full(queue));
  for (i = 0; i < 10; i++) {
    queue_push(queue, i);
  }
  assert(queue_full(queue));
  for (i = 0; i < 10; i++) {
    item = queue_pop(queue);
  }
  assert(item == 19);
}

void empty_queue_test() {
  int i;
  pthread_t child[NUM_CHILDREN];

  Shared *shared = make_shared();

  child[1] = make_thread(consumer_entry, shared);
  sleep(1);
  child[0] = make_thread(producer_entry, shared);

  for (i = 0; i < NUM_CHILDREN; i++) {
    join_thread(child[i]);
  }
}

void *producer_positive(void *arg)
{
  int i;
  Shared *shared = (Shared *)arg;
  for (i = 0; i < (QUEUE_LENGTH - 1) / 2; i++) {
    queue_push(shared->queue, 1);
  }
  pthread_exit(NULL);
}

void *producer_negative(void *arg)
{
  int i;
  int item;
  Shared *shared = (Shared *)arg;

  for (i = 0; i < (QUEUE_LENGTH - 1) - ((QUEUE_LENGTH - 1) / 2); i++) {
    queue_push(shared->queue, -1);
  }
  pthread_exit(NULL);
}

void thread_safe_test() {
  int i;
  pthread_t child[NUM_CHILDREN];

  Shared *shared = make_shared();

  for (unsigned int k = 0; k < QUEUE_LENGTH; k++) {
    shared->queue->array[k] = 0;
  }

  child[0] = make_thread(producer_positive, shared);
  child[1] = make_thread(producer_negative, shared);

  for (i=0; i<NUM_CHILDREN; i++) {
    join_thread(child[i]);
  }

  int was_zero = 0;
  for (unsigned int k = 0; k < QUEUE_LENGTH; k++) {
    assert(!(was_zero && shared->queue->array[k]));
    was_zero = was_zero || !shared->queue->array[k];
  }
}