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-rw-r--r--src/libbasic/include/basic/prioq.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/libbasic/include/basic/prioq.h b/src/libbasic/include/basic/prioq.h
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+++ b/src/libbasic/include/basic/prioq.h
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+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+#include "hashmap.h"
+#include "macro.h"
+
+typedef struct Prioq Prioq;
+
+#define PRIOQ_IDX_NULL ((unsigned) -1)
+
+Prioq *prioq_new(compare_func_t compare);
+Prioq *prioq_free(Prioq *q);
+int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
+
+int prioq_put(Prioq *q, void *data, unsigned *idx);
+int prioq_remove(Prioq *q, void *data, unsigned *idx);
+int prioq_reshuffle(Prioq *q, void *data, unsigned *idx);
+
+void *prioq_peek(Prioq *q) _pure_;
+void *prioq_pop(Prioq *q);
+
+unsigned prioq_size(Prioq *q) _pure_;
+bool prioq_isempty(Prioq *q) _pure_;