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#ifndef fooidxsethfoo
#define fooidxsethfoo
#include <inttypes.h>
#define IDXSET_INVALID ((uint32_t) -1)
struct idxset;
struct idxset* idxset_new(unsigned (*hash_func) (void *p), int (*compare_func) (void*a, void*b));
void idxset_free(struct idxset *s, void (*free_func) (void *p, void *userdata), void *userdata);
int idxset_put(struct idxset*s, void *p, uint32_t *index);
void* idxset_get_by_index(struct idxset*s, uint32_t index);
void* idxset_get_by_data(struct idxset*s, void *p, uint32_t *index);
void* idxset_remove_by_index(struct idxset*s, uint32_t index);
void* idxset_remove_by_data(struct idxset*s, void *p, uint32_t *index);
/* This may be used to iterate through all entries. When called with
an invalid index value it returns the first entry, otherwise the
next following. The function is best called with *index =
IDXSET_VALID first. */
void* idxset_rrobin(struct idxset *s, uint32_t *index);
/* Return the oldest entry in the idxset */
void* idxset_first(struct idxset *s, uint32_t *index);
int idxset_foreach(struct idxset*s, int (*func)(void *p, uint32_t index, int *del, void*userdata), void *userdata);
unsigned idxset_ncontents(struct idxset*s);
int idxset_isempty(struct idxset *s);
#endif
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