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de3dd40e PP |
1 | #ifndef BABELTRACE_REF_INTERNAL_H |
2 | #define BABELTRACE_REF_INTERNAL_H | |
273b65be JG |
3 | |
4 | /* | |
de3dd40e | 5 | * Babeltrace - reference counting |
273b65be | 6 | * |
de9dd397 | 7 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
273b65be JG |
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 <assert.h> | |
31 | ||
de3dd40e PP |
32 | struct bt_ref; |
33 | ||
34 | typedef void (*bt_ref_release_func_t)(struct bt_ref *); | |
35 | ||
36 | struct bt_ref { | |
273b65be | 37 | long refcount; |
de3dd40e | 38 | bt_ref_release_func_t release_func; |
273b65be JG |
39 | }; |
40 | ||
41 | static inline | |
de3dd40e PP |
42 | void bt_ref_init(struct bt_ref *ref, |
43 | bt_ref_release_func_t release_func) | |
273b65be JG |
44 | { |
45 | assert(ref); | |
46 | ref->refcount = 1; | |
de3dd40e | 47 | ref->release_func = release_func; |
273b65be JG |
48 | } |
49 | ||
50 | static inline | |
de3dd40e | 51 | void bt_ref_get(struct bt_ref *ref) |
273b65be JG |
52 | { |
53 | assert(ref); | |
54 | ref->refcount++; | |
55 | } | |
56 | ||
57 | static inline | |
de3dd40e | 58 | void bt_ref_put(struct bt_ref *ref) |
273b65be JG |
59 | { |
60 | assert(ref); | |
de3dd40e | 61 | assert(ref->release_func); |
273b65be | 62 | if ((--ref->refcount) == 0) { |
de3dd40e | 63 | ref->release_func(ref); |
273b65be JG |
64 | } |
65 | } | |
66 | ||
de3dd40e | 67 | #endif /* BABELTRACE_REF_INTERNAL_H */ |