src/basic/prioq.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2013 Lennart Poettering
   8 ***/
   9
  10 #include <stdbool.h>
  11
  12 #include "hashmap.h"
  13 #include "macro.h"
  14
  15 typedef struct Prioq Prioq;
  16
  17 #define PRIOQ_IDX_NULL ((unsigned) -1)
  18
  19 Prioq *prioq_new(compare_func_t compare);
  20 Prioq *prioq_free(Prioq *q);
  21 int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
  22
  23 int prioq_put(Prioq *q, void *data, unsigned *idx);
  24 int prioq_remove(Prioq *q, void *data, unsigned *idx);
  25 int prioq_reshuffle(Prioq *q, void *data, unsigned *idx);
  26
  27 void *prioq_peek(Prioq *q) _pure_;
  28 void *prioq_pop(Prioq *q);
  29
  30 unsigned prioq_size(Prioq *q) _pure_;
  31 bool prioq_isempty(Prioq *q) _pure_;