1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSWeakPrivate.h"
28
29#include "APICast.h"
30#include "JSCInlines.h"
31#include "Weak.h"
32#include <wtf/ThreadSafeRefCounted.h>
33
34using namespace JSC;
35
36struct OpaqueJSWeak : ThreadSafeRefCounted<OpaqueJSWeak> {
37 OpaqueJSWeak(JSObject* object)
38 : weak(object)
39 {
40 }
41
42 Weak<JSObject> weak;
43};
44
45JSWeakRef JSWeakCreate(JSContextGroupRef contextGroup, JSObjectRef objectRef)
46{
47 VM* vm = toJS(contextGroup);
48 JSLockHolder locker(vm);
49 return new OpaqueJSWeak(toJS(objectRef));
50}
51
52void JSWeakRetain(JSContextGroupRef contextGroup, JSWeakRef weakRef)
53{
54 VM* vm = toJS(contextGroup);
55 JSLockHolder locker(vm);
56 weakRef->ref();
57}
58
59void JSWeakRelease(JSContextGroupRef contextGroup, JSWeakRef weakRef)
60{
61 VM* vm = toJS(contextGroup);
62 JSLockHolder locker(vm);
63 weakRef->deref();
64}
65
66JSObjectRef JSWeakGetObject(JSWeakRef weakRef)
67{
68 return toRef(weakRef->weak.get());
69}
70
71