JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / runtime / SymbolTable.cpp

diff --git a/runtime/SymbolTable.cpp b/runtime/SymbolTable.cpp
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+/*
+ * Copyright (C) 2012 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
+ */
+
+#include "config.h"
+#include "SymbolTable.h"
+
+namespace JSC {
+
+const ClassInfo SharedSymbolTable::s_info = { "SharedSymbolTable", 0, 0, 0, CREATE_METHOD_TABLE(SharedSymbolTable) };
+
+SymbolTableEntry& SymbolTableEntry::copySlow(const SymbolTableEntry& other)
+{
+    ASSERT(other.isFat());
+    FatEntry* newFatEntry = new FatEntry(*other.fatEntry());
+    freeFatEntry();
+    m_bits = bitwise_cast<intptr_t>(newFatEntry);
+    return *this;
+}
+
+void SharedSymbolTable::destroy(JSCell* cell)
+{
+    SharedSymbolTable* thisObject = jsCast<SharedSymbolTable*>(cell);
+    thisObject->SharedSymbolTable::~SharedSymbolTable();
+}
+
+void SymbolTableEntry::freeFatEntrySlow()
+{
+    ASSERT(isFat());
+    delete fatEntry();
+}
+
+bool SymbolTableEntry::couldBeWatched()
+{
+    if (!isFat())
+        return false;
+    WatchpointSet* watchpoints = fatEntry()->m_watchpoints.get();
+    if (!watchpoints)
+        return false;
+    return watchpoints->isStillValid();
+}
+
+void SymbolTableEntry::attemptToWatch()
+{
+    FatEntry* entry = inflate();
+    if (!entry->m_watchpoints)
+        entry->m_watchpoints = adoptRef(new WatchpointSet(InitializedWatching));
+}
+
+bool* SymbolTableEntry::addressOfIsWatched()
+{
+    ASSERT(couldBeWatched());
+    return fatEntry()->m_watchpoints->addressOfIsWatched();
+}
+
+void SymbolTableEntry::addWatchpoint(Watchpoint* watchpoint)
+{
+    ASSERT(couldBeWatched());
+    fatEntry()->m_watchpoints->add(watchpoint);
+}
+
+void SymbolTableEntry::notifyWriteSlow()
+{
+    WatchpointSet* watchpoints = fatEntry()->m_watchpoints.get();
+    if (!watchpoints)
+        return;
+    watchpoints->notifyWrite();
+}
+
+SymbolTableEntry::FatEntry* SymbolTableEntry::inflateSlow()
+{
+    FatEntry* entry = new FatEntry(m_bits);
+    m_bits = bitwise_cast<intptr_t>(entry);
+    return entry;
+}
+
+} // namespace JSC
+