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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "platform/heap/PersistentNode.h" | 5 #include "platform/heap/PersistentNode.h" |
6 | 6 |
7 #include "platform/heap/Handle.h" | 7 #include "platform/heap/Handle.h" |
8 | 8 |
9 namespace blink { | 9 namespace blink { |
10 | 10 |
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112 freeListLast->setFreeListNext(m_freeListHead); | 112 freeListLast->setFreeListNext(m_freeListHead); |
113 m_freeListHead = freeListNext; | 113 m_freeListHead = freeListNext; |
114 } | 114 } |
115 prevNext = &slots->m_next; | 115 prevNext = &slots->m_next; |
116 slots = slots->m_next; | 116 slots = slots->m_next; |
117 } | 117 } |
118 } | 118 } |
119 ASSERT(persistentCount == m_persistentCount); | 119 ASSERT(persistentCount == m_persistentCount); |
120 } | 120 } |
121 | 121 |
122 | |
123 namespace { | |
124 class GCObject final : public GarbageCollected<GCObject> { | |
125 public: | |
126 DEFINE_INLINE_TRACE() { } | |
127 }; | |
128 } | |
129 | |
130 void CrossThreadPersistentRegion::prepareForThreadStateTermination(ThreadState*
threadState) | 122 void CrossThreadPersistentRegion::prepareForThreadStateTermination(ThreadState*
threadState) |
131 { | 123 { |
132 // For heaps belonging to a thread that's detaching, any cross-thread persis
tents | 124 // For heaps belonging to a thread that's detaching, any cross-thread persis
tents |
133 // pointing into them needs to be disabled. Do that by clearing out the unde
rlying | 125 // pointing into them needs to be disabled. Do that by clearing out the unde
rlying |
134 // heap reference. | 126 // heap reference. |
135 MutexLocker lock(m_mutex); | 127 MutexLocker lock(m_mutex); |
136 | 128 |
137 // TODO(sof): consider ways of reducing overhead. (e.g., tracking number of
active | 129 // TODO(sof): consider ways of reducing overhead. (e.g., tracking number of
active |
138 // CrossThreadPersistent<>s pointing into the heaps of each ThreadState and
use that | 130 // CrossThreadPersistent<>s pointing into the heaps of each ThreadState and
use that |
139 // count to bail out early.) | 131 // count to bail out early.) |
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156 if (page->orphaned()) | 148 if (page->orphaned()) |
157 continue; | 149 continue; |
158 if (page->arena()->getThreadState() == threadState) | 150 if (page->arena()->getThreadState() == threadState) |
159 persistent->clear(); | 151 persistent->clear(); |
160 } | 152 } |
161 slots = slots->m_next; | 153 slots = slots->m_next; |
162 } | 154 } |
163 } | 155 } |
164 | 156 |
165 } // namespace blink | 157 } // namespace blink |
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