1:255.8-alt1
[systemd_ALT.git] / src / basic / prioq.h
blobf66562f38764ef93553dc52b280e6125283f56ad
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 #pragma once
4 #include <stdbool.h>
6 #include "hashmap.h"
7 #include "macro.h"
9 typedef struct Prioq Prioq;
11 #define PRIOQ_IDX_NULL (UINT_MAX)
13 Prioq *prioq_new(compare_func_t compare);
14 Prioq *prioq_free(Prioq *q);
15 DEFINE_TRIVIAL_CLEANUP_FUNC(Prioq*, prioq_free);
16 int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
18 int prioq_put(Prioq *q, void *data, unsigned *idx);
19 int prioq_ensure_put(Prioq **q, compare_func_t compare_func, void *data, unsigned *idx);
20 int prioq_remove(Prioq *q, void *data, unsigned *idx);
21 void prioq_reshuffle(Prioq *q, void *data, unsigned *idx);
23 void *prioq_peek_by_index(Prioq *q, unsigned idx) _pure_;
24 static inline void *prioq_peek(Prioq *q) {
25 return prioq_peek_by_index(q, 0);
27 void *prioq_pop(Prioq *q);
29 #define PRIOQ_FOREACH_ITEM(q, p) \
30 for (unsigned _i = 0; (p = prioq_peek_by_index(q, _i)); _i++)
32 unsigned prioq_size(Prioq *q) _pure_;
33 bool prioq_isempty(Prioq *q) _pure_;