1/*
2 * Copyright (C) 2007 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "WebCoreObjCExtras.h"
31
32#include <objc/objc-auto.h>
33#include <objc/objc-runtime.h>
34#include <wtf/Assertions.h>
35#include <wtf/MainThread.h>
36#include <wtf/Threading.h>
37#include <wtf/UnusedParam.h>
38
39void WebCoreObjCFinalizeOnMainThread(Class cls)
40{
41    // This method relies on threading being initialized by the caller, otherwise
42    // WebCoreObjCScheduleDeallocateOnMainThread will crash.
43#if !defined(BUILDING_ON_TIGER) && !defined(DONT_FINALIZE_ON_MAIN_THREAD)
44    objc_finalizeOnMainThread(cls);
45#else
46    UNUSED_PARAM(cls);
47#endif
48}
49
50#ifdef BUILDING_ON_TIGER
51static inline IMP method_getImplementation(Method method)
52{
53    return method->method_imp;
54}
55#endif
56
57typedef std::pair<Class, id> ClassAndIdPair;
58
59static void deallocCallback(void* context)
60{
61    ClassAndIdPair* pair = static_cast<ClassAndIdPair*>(context);
62
63    Method method = class_getInstanceMethod(pair->first, @selector(dealloc));
64
65    IMP imp = method_getImplementation(method);
66    imp(pair->second, @selector(dealloc));
67
68    delete pair;
69}
70
71bool WebCoreObjCScheduleDeallocateOnMainThread(Class cls, id object)
72{
73    ASSERT([object isKindOfClass:cls]);
74
75#if USE(WEB_THREAD)
76    if (isMainThread())
77        return false;
78#else
79    if (pthread_main_np() != 0)
80        return false;
81#endif
82
83    ClassAndIdPair* pair = new ClassAndIdPair(cls, object);
84    callOnMainThread(deallocCallback, pair);
85    return true;
86}
87
88