blob: 14f31abbb429ce49c868ac80da14455346bfabeb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*************************************************************************
* Copyright (C) 2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library 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 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Generic reference count implementation.
*/
/**
* Increment a reference count.
* @param[in,out] object The reference-counted object to acquire.
*/
#define DMNSN_INCREF(obj) ((void)++(*(obj)->refcount))
/**
* Decrement a reference count.
* @param[in,out] object The reference-counted object to release.
* @return Whether the object is now garbage.
*/
#define DMNSN_DECREF(obj) (*(obj)->refcount == 0 || --(*(obj)->refcount) == 0)
/**
* Reference counter.
*/
typedef unsigned int dmnsn_refcount;
/**
* Create a reference count.
* @return A new reference counter, initialized to zero (a "borrowed" reference,
* which will be garbage-collected the first time it is deleted).
*/
dmnsn_refcount *dmnsn_new_refcount(void);
/**
* Delete a reference count. Raises an error if the reference count wasn't
* zero.
*/
void dmnsn_delete_refcount(dmnsn_refcount *refcount);
|
