webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 79 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/WeakGCMapInlines.h b/Source/JavaScriptCore/runtime/WeakGCMapInlines.h
new file mode 100644
index 000000000..76c1a5d85
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/WeakGCMapInlines.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "HeapInlines.h"
+#include "WeakGCMap.h"
+#include "WeakInlines.h"
+
+namespace JSC {
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+inline WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::WeakGCMap(VM& vm)
+    : m_vm(vm)
+{
+    vm.heap.registerWeakGCMap(this, [this]() {
+        pruneStaleEntries();
+    });
+}
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+inline WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::~WeakGCMap()
+{
+    m_vm.heap.unregisterWeakGCMap(this);
+}
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+inline typename WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::iterator WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::find(const KeyType& key)
+{
+    iterator it = m_map.find(key);
+    iterator end = m_map.end();
+    if (it != end && !it->value) // Found a zombie value.
+        return end;
+    return it;
+}
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+inline typename WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::const_iterator WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::find(const KeyType& key) const
+{
+    return const_cast<WeakGCMap*>(this)->find(key);
+}
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+inline bool WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::contains(const KeyType& key) const
+{
+    return find(key) != m_map.end();
+}
+
+template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
+NEVER_INLINE void WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::pruneStaleEntries()
+{
+    m_map.removeIf([](typename HashMapType::KeyValuePairType& entry) {
+        return !entry.value;
+    });
+}
+
+} // namespace JSC