/*
 * cond_dynamic.c
 *
 * Demonstrate dynamic initialization of a condition variable.
 */
#include <pthread.h>
#include "errors.h"

/*
 * Define a structure, with a mutex and condition variable.
 */
typedef struct my_struct_tag {
  pthread_mutex_t mutex; /* Protects access to value */
  pthread_cond_t cond;   /* Signals change to value */
  int value;             /* Access protected by mutex */
} my_struct_t;

int
main(int argc, char* argv[])
{
  my_struct_t* data;
  int status;

  data = malloc(sizeof(my_struct_t));
  if (data == NULL)
    errno_abort("Allocate structure");
  status = pthread_mutex_init(&data->mutex, NULL);
  if (status != 0)
    err_abort(status, "Init mutex");
  status = pthread_cond_init(&data->cond, NULL);
  if (status != 0)
    err_abort(status, "Init condition");
  status = pthread_cond_destroy(&data->cond);
  if (status != 0)
    err_abort(status, "Destroy condition");
  status = pthread_mutex_destroy(&data->mutex);
  if (status != 0)
    err_abort(status, "Destroy mutex");
  (void) free(data);
  return status;
}