lib/ctf-ir/trace.c: validate PH `packet_seq_num` field
[babeltrace.git] / lib / ref.c
1 /*
2 * ref.c: reference counting
3 *
4 * Babeltrace Library
5 *
6 * Copyright (c) 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
27 #define BT_LOG_TAG "REF"
28 #include <babeltrace/lib-logging-internal.h>
29
30 #include <babeltrace/ref-internal.h>
31 #include <babeltrace/object-internal.h>
32
33 void *bt_get(void *ptr)
34 {
35 struct bt_object *obj = ptr;
36
37 if (unlikely(!obj)) {
38 goto end;
39 }
40
41 if (unlikely(!obj->ref_count.release)) {
42 goto end;
43 }
44
45 if (unlikely(obj->parent && bt_object_get_ref_count(obj) == 0)) {
46 BT_LOGV("Incrementing object's parent's reference count: "
47 "addr=%p, parent-addr=%p", ptr, obj->parent);
48 bt_get(obj->parent);
49 }
50 BT_LOGV("Incrementing object's reference count: %lu -> %lu: "
51 "addr=%p, cur-count=%lu, new-count=%lu",
52 obj->ref_count.count, obj->ref_count.count + 1,
53 ptr,
54 obj->ref_count.count, obj->ref_count.count + 1);
55 bt_ref_get(&obj->ref_count);
56
57 end:
58 return obj;
59 }
60
61 void bt_put(void *ptr)
62 {
63 struct bt_object *obj = ptr;
64
65 if (unlikely(!obj)) {
66 return;
67 }
68
69 if (unlikely(!obj->ref_count.release)) {
70 return;
71 }
72
73 if (BT_LOG_ON_WARN && unlikely(bt_object_get_ref_count(obj) == 0)) {
74 BT_LOGW("Decrementing a reference count set to 0: addr=%p",
75 ptr);
76 }
77
78 BT_LOGV("Decrementing object's reference count: %lu -> %lu: "
79 "addr=%p, cur-count=%lu, new-count=%lu",
80 obj->ref_count.count, obj->ref_count.count - 1,
81 ptr,
82 obj->ref_count.count, obj->ref_count.count - 1);
83 bt_ref_put(&obj->ref_count);
84 }
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