1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : *
3 : * ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is Mozilla Communicator client code, released
17 : * March 31, 1998.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * Netscape Communications Corporation.
21 : * Portions created by the Initial Developer are Copyright (C) 1998
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either of the GNU General Public License Version 2 or later (the "GPL"),
28 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 : #ifndef jslock_h__
40 : #define jslock_h__
41 :
42 : #include "jsapi.h"
43 :
44 : #ifdef JS_THREADSAFE
45 :
46 : # include "pratom.h"
47 : # include "prlock.h"
48 : # include "prcvar.h"
49 : # include "prthread.h"
50 : # include "prinit.h"
51 :
52 : # define JS_ATOMIC_INCREMENT(p) PR_ATOMIC_INCREMENT((PRInt32 *)(p))
53 : # define JS_ATOMIC_DECREMENT(p) PR_ATOMIC_DECREMENT((PRInt32 *)(p))
54 : # define JS_ATOMIC_ADD(p,v) PR_ATOMIC_ADD((PRInt32 *)(p), (PRInt32)(v))
55 : # define JS_ATOMIC_SET(p,v) PR_ATOMIC_SET((PRInt32 *)(p), (PRInt32)(v))
56 :
57 : #else /* JS_THREADSAFE */
58 :
59 : # define JS_ATOMIC_INCREMENT(p) (++*(p))
60 : # define JS_ATOMIC_DECREMENT(p) (--*(p))
61 : # define JS_ATOMIC_ADD(p,v) (*(p) += (v))
62 : # define JS_ATOMIC_SET(p,v) (*(p) = (v))
63 :
64 : #endif /* JS_THREADSAFE */
65 :
66 : namespace js {
67 :
68 : class AutoAtomicIncrement
69 : {
70 : int32_t *p;
71 : JS_DECL_USE_GUARD_OBJECT_NOTIFIER
72 :
73 : public:
74 19 : AutoAtomicIncrement(int32_t *p JS_GUARD_OBJECT_NOTIFIER_PARAM)
75 19 : : p(p) {
76 19 : JS_GUARD_OBJECT_NOTIFIER_INIT;
77 19 : JS_ATOMIC_INCREMENT(p);
78 19 : }
79 :
80 38 : ~AutoAtomicIncrement() {
81 19 : JS_ATOMIC_DECREMENT(p);
82 19 : }
83 : };
84 :
85 : } /* namespace js */
86 :
87 : #endif /* jslock_h___ */
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