| 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 | |
| 33 | struct bt_object; |
| 34 | typedef void (*bt_object_release_func)(struct bt_object *); |
| 35 | |
| 36 | struct bt_ref { |
| 37 | long count; |
| 38 | bt_object_release_func release; |
| 39 | }; |
| 40 | |
| 41 | static inline |
| 42 | void 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 | |
| 49 | static inline |
| 50 | void bt_ref_get(struct bt_ref *ref) |
| 51 | { |
| 52 | assert(ref); |
| 53 | ref->count++; |
| 54 | } |
| 55 | |
| 56 | static inline |
| 57 | void 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 */ |