#ifndef VIETER_CAT_HEAP
#define VIETER_CAT_HEAP

#include <stdint.h>

typedef struct vieter_cat_heap vieter_cat_heap;

typedef enum vieter_cat_heap_error {
  vieter_cat_heap_ok = 0,
  vieter_cat_heap_arch_empty = 1,
  vieter_cat_heap_arch_not_found = 2
} vieter_cat_heap_error;

vieter_cat_heap *vieter_cat_heap_init();

void vieter_cat_heap_free(vieter_cat_heap **ptp);

uint64_t vieter_cat_heap_size(vieter_cat_heap *cheap);

vieter_cat_heap_error vieter_cat_heap_insert(vieter_cat_heap *cheap,
                                             char *category, uint64_t key,
                                             void *data);

vieter_cat_heap_error vieter_cat_heap_pop(void **out, vieter_cat_heap *cheap,
                                          char *category);

vieter_cat_heap_error vieter_cat_heap_peek(void **out, vieter_cat_heap *cheap,
                                           char *category);

/*
 * Acquire a read lock on the heap. Return value is the result of
 * pthread_rwlock_rdlock.
 */
int vieter_cat_heap_rlock(vieter_cat_heap *cheap);

/*
 * Acquire a write lock on the heap. Return value is the result of
 * pthread_rwlock_wrlock.
 */
int vieter_cat_heap_wlock(vieter_cat_heap *cheap);

/*
 * Unlock the lock after having acquired it. Return value is the result of
 * pthread_rwlock_unlock.
 */
int vieter_cat_heap_unlock(vieter_cat_heap *cheap);

#endif