Change behaviour of stream-intersection with multiple traces
[babeltrace.git] / include / babeltrace / ref-internal.h
... / ...
CommitLineData
1#ifndef BABELTRACE_REF_INTERNAL_H
2#define BABELTRACE_REF_INTERNAL_H
3
4/*
5 * Babeltrace - Reference Counting
6 *
7 * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
8 *
9 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 * SOFTWARE.
28 */
29
30#include <babeltrace/babeltrace-internal.h>
31#include <assert.h>
32
33struct bt_object;
34typedef void (*bt_object_release_func)(struct bt_object *);
35
36struct bt_ref {
37 long count;
38 bt_object_release_func release;
39};
40
41static inline
42void bt_ref_init(struct bt_ref *ref, bt_object_release_func release)
43{
44 assert(ref);
45 ref->count = 1;
46 ref->release = release;
47}
48
49static inline
50void bt_ref_get(struct bt_ref *ref)
51{
52 assert(ref);
53 ref->count++;
54}
55
56static inline
57void bt_ref_put(struct bt_ref *ref)
58{
59 assert(ref);
60 /* Only assert if the object has opted-in for reference counting. */
61 assert(!ref->release || ref->count > 0);
62 if ((--ref->count) == 0 && ref->release) {
63 ref->release((struct bt_object *) ref);
64 }
65}
66
67#endif /* BABELTRACE_REF_INTERNAL_H */
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