1 : /* ***** BEGIN LICENSE BLOCK *****
2 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3 : *
4 : * The contents of this file are subject to the Mozilla Public License Version
5 : * 1.1 (the "License"); you may not use this file except in compliance with
6 : * the License. You may obtain a copy of the License at
7 : * http://www.mozilla.org/MPL/
8 : *
9 : * Software distributed under the License is distributed on an "AS IS" basis,
10 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11 : * for the specific language governing rights and limitations under the
12 : * License.
13 : *
14 : * The Original Code is Mozilla code.
15 : *
16 : * The Initial Developer of the Original Code is the Mozilla Foundation.
17 : * Portions created by the Initial Developer are Copyright (C) 2010
18 : * the Initial Developer. All Rights Reserved.
19 : *
20 : * Contributor(s):
21 : * Justin Lebar <justin.lebar@gmail.com>
22 : *
23 : * Alternatively, the contents of this file may be used under the terms of
24 : * either the GNU General Public License Version 2 or later (the "GPL"), or
25 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26 : * in which case the provisions of the GPL or the LGPL are applicable instead
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28 : * under the terms of either the GPL or the LGPL, and not to allow others to
29 : * use your version of this file under the terms of the MPL, indicate your
30 : * decision by deleting the provisions above and replace them with the notice
31 : * and other provisions required by the GPL or the LGPL. If you do not delete
32 : * the provisions above, a recipient may use your version of this file under
33 : * the terms of any one of the MPL, the GPL or the LGPL.
34 : *
35 : * ***** END LICENSE BLOCK ***** */
36 :
37 : #ifndef nsAtomicRefcnt_h__
38 : #define nsAtomicRefcnt_h__
39 :
40 : #include "nscore.h"
41 : #include "pratom.h"
42 :
43 : class nsAutoRefCnt;
44 :
45 : // This header defines functions for modifying refcounts which wrap the
46 : // PR_ATOMIC_* macros.
47 :
48 : #if defined(XP_WIN)
49 :
50 : #if PR_BYTES_PER_LONG == 4
51 : typedef volatile long nsAtomicRefcnt;
52 : #else
53 : #error "Windows should have 4 bytes per long."
54 : #endif
55 :
56 : #else /* !defined(XP_WIN) */
57 :
58 : typedef PRInt32 nsAtomicRefcnt;
59 :
60 : #endif
61 :
62 : inline PRInt32
63 0 : NS_AtomicIncrementRefcnt(PRInt32 &refcnt)
64 : {
65 0 : return PR_ATOMIC_INCREMENT(&refcnt);
66 : }
67 :
68 : inline nsrefcnt
69 561827 : NS_AtomicIncrementRefcnt(nsrefcnt &refcnt)
70 : {
71 561827 : return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
72 : }
73 :
74 : inline nsrefcnt
75 55688888 : NS_AtomicIncrementRefcnt(nsAutoRefCnt &refcnt)
76 : {
77 : // This cast is safe since nsAtomicRefCnt contains just one member, its refcount.
78 55688888 : return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
79 : }
80 :
81 : inline nsrefcnt
82 561492 : NS_AtomicDecrementRefcnt(nsrefcnt &refcnt)
83 : {
84 561492 : return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
85 : }
86 :
87 : inline nsrefcnt
88 55684334 : NS_AtomicDecrementRefcnt(nsAutoRefCnt &refcnt)
89 : {
90 55684334 : return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
91 : }
92 :
93 : inline PRInt32
94 0 : NS_AtomicDecrementRefcnt(PRInt32 &refcnt)
95 : {
96 0 : return PR_ATOMIC_DECREMENT(&refcnt);
97 : }
98 :
99 : #endif
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