/*
 * File: condvar1.c
 *
 * Test Synopsis:
 * - Test basic function of a CV
 *
 * Test Method (Validation or Falsification):
 * - Validation
 *
 * Requirements Tested:
 * - 
 *
 * Features Tested:
 * - 
 *
 * Cases Tested:
 * - 
 *
 * Description:
 * - The primary thread takes the lock before creating any threads.
 *   The secondary thread blocks on the lock allowing the primary
 *   thread to enter the cv wait state which releases the lock.
 *   The secondary thread then takes the lock and signals the waiting
 *   primary thread.
 *
 * Environment:
 * - 
 *
 * Input:
 * - None.
 *
 * Output:
 * - File name, Line number, and failed expression on failure.
 * - No output on success.
 *
 * Assumptions:
 * - 
 *
 * Pass Criteria:
 * - pthread_cond_timedwait returns 0.
 * - Process returns zero exit status.
 *
 * Fail Criteria:
 * - pthread_cond_timedwait returns ETIMEDOUT.
 * - Process returns non-zero exit status.
 */

#include "test.h"

typedef struct cvthing_t_ cvthing_t;

struct cvthing_t_ {
  pthread_cond_t notbusy;
  pthread_mutex_t lock;
};

static cvthing_t cvthing;

static enum {
  NUMTHREADS = 2         /* Including the primary thread. */
};

void *
mythread(void * arg)
{
  assert(pthread_mutex_lock(&cvthing.lock) == 0);

  assert(pthread_cond_signal(&cvthing.notbusy) == 0);

  assert(pthread_mutex_unlock(&cvthing.lock) == 0);

  return 0;
}

int
main()
{
  pthread_t t[NUMTHREADS];
  struct timespec abstime = { 0, 0 };
  struct timeval curtime;

  assert((t[0] = pthread_self()) != NULL);

  assert(pthread_cond_init(&cvthing, NULL) == 0);

  assert(pthread_mutex_init(&cvthing.lock) == 0);

  assert(pthread_mutex_lock(&cvthing.lock) == 0);

  assert(gettimeofday(&curtime, NULL) == 0);

  abstime.tv_sec = curtime.tv_sec + 5;

  assert(pthread_create(&t[1], NULL, mythread, (void *) 1) == 0);

  assert(pthread_cond_timedwait(&cvthing.notbusy, &cvthing.lock, &abstime) == 0);

  assert(pthread_mutex_unlock(&cvthing.lock) == 0);

  assert(pthread_cond_destroy(&cvthing) == 0);

  return 0;
}