1 /*
2 * Copyright (C) 2009 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "DOMData.h"
33
34 #include "ChildThreadDOMData.h"
35 #include "MainThreadDOMData.h"
36 #include "WebGLContextAttributes.h"
37 #include "WebGLUniformLocation.h"
38
39 namespace WebCore {
40
DOMData()41 DOMData::DOMData()
42 : m_delayedProcessingScheduled(false)
43 , m_isMainThread(WTF::isMainThread())
44 , m_owningThread(WTF::currentThread())
45 {
46 }
47
~DOMData()48 DOMData::~DOMData()
49 {
50 }
51
getCurrent()52 DOMData* DOMData::getCurrent()
53 {
54 if (WTF::isMainThread())
55 return MainThreadDOMData::getCurrent();
56
57 DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<ChildThreadDOMData>, childThreadDOMData, ());
58 return childThreadDOMData;
59 }
60
ensureDeref(V8ClassIndex::V8WrapperType type,void * domObject)61 void DOMData::ensureDeref(V8ClassIndex::V8WrapperType type, void* domObject)
62 {
63 if (m_owningThread == WTF::currentThread()) {
64 // No need to delay the work. We can deref right now.
65 derefObject(type, domObject);
66 return;
67 }
68
69 // We need to do the deref on the correct thread.
70 m_delayedObjectMap.set(domObject, type);
71
72 // Post a task to the owning thread in order to process the delayed queue.
73 // FIXME: For now, we can only post to main thread due to WTF task posting limitation. We will fix this when we work on nested worker.
74 if (!m_delayedProcessingScheduled) {
75 m_delayedProcessingScheduled = true;
76 if (isMainThread())
77 WTF::callOnMainThread(&derefDelayedObjectsInCurrentThread, 0);
78 }
79 }
80
derefObject(V8ClassIndex::V8WrapperType type,void * domObject)81 void DOMData::derefObject(V8ClassIndex::V8WrapperType type, void* domObject)
82 {
83 switch (type) {
84 case V8ClassIndex::NODE:
85 static_cast<Node*>(domObject)->deref();
86 break;
87
88 #define MakeCase(type, name) \
89 case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
90 DOM_OBJECT_TYPES(MakeCase) // This includes both active and non-active.
91 #undef MakeCase
92
93 #if ENABLE(SVG)
94 #define MakeCase(type, name) \
95 case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
96 SVG_OBJECT_TYPES(MakeCase) // This also includes SVGElementInstance.
97 #undef MakeCase
98
99 #define MakeCase(type, name) \
100 case V8ClassIndex::type: \
101 static_cast<V8SVGPODTypeWrapper<name>*>(domObject)->deref(); break;
102 SVG_POD_NATIVE_TYPES(MakeCase)
103 #undef MakeCase
104 #endif
105
106 default:
107 ASSERT_NOT_REACHED();
108 break;
109 }
110 }
111
derefDelayedObjects()112 void DOMData::derefDelayedObjects()
113 {
114 WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
115
116 m_delayedProcessingScheduled = false;
117
118 for (DelayedObjectMap::iterator iter(m_delayedObjectMap.begin()); iter != m_delayedObjectMap.end(); ++iter)
119 derefObject(iter->second, iter->first);
120
121 m_delayedObjectMap.clear();
122 }
123
derefDelayedObjectsInCurrentThread(void *)124 void DOMData::derefDelayedObjectsInCurrentThread(void*)
125 {
126 getCurrent()->derefDelayedObjects();
127 }
128
129 } // namespace WebCore
130