tree-wide: use UINT64_MAX or friends

[thirdparty/systemd.git] / src / basic / prioq.h

diff --git a/src/basic/prioq.h b/src/basic/prioq.h
index 6a2451387ce3dd05c74a79e86e06d5d45dedf003..7c7664761135a761e194458fe931433a63991d81 100644 (file)
--- a/src/basic/prioq.h
+++ b/src/basic/prioq.h
@@ -1,26 +1,6 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 #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"
@@ -28,18 +8,25 @@
 
 typedef struct Prioq Prioq;
 
-#define PRIOQ_IDX_NULL ((unsigned) -1)
+#define PRIOQ_IDX_NULL (UINT_MAX)
 
 Prioq *prioq_new(compare_func_t compare);
 Prioq *prioq_free(Prioq *q);
+DEFINE_TRIVIAL_CLEANUP_FUNC(Prioq*, prioq_free);
 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_peek_by_index(Prioq *q, unsigned idx) _pure_;
+static inline void *prioq_peek(Prioq *q) {
+        return prioq_peek_by_index(q, 0);
+}
 void *prioq_pop(Prioq *q);
 
+#define PRIOQ_FOREACH_ITEM(q, p)                                \
+        for (unsigned _i = 0; (p = prioq_peek_by_index(q, _i)); _i++)
+
 unsigned prioq_size(Prioq *q) _pure_;
 bool prioq_isempty(Prioq *q) _pure_;