1 files changed, 86 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/GCHandle.cpp b/Source/JavaScriptCore/runtime/GCHandle.cpp
new file mode 100644
index 0000000..297de38
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/GCHandle.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#include "config.h"
+#include "GCHandle.h"
+
+namespace JSC {
+
+WeakGCHandlePool* WeakGCHandle::pool()
+{
+    uintptr_t pool = (reinterpret_cast<uintptr_t>(this) & WeakGCHandlePool::poolMask);
+    return reinterpret_cast<WeakGCHandlePool*>(pool);
+}
+
+WeakGCHandlePool::WeakGCHandlePool()
+{
+    ASSERT(sizeof(WeakGCHandlePool) <= WeakGCHandlePool::poolSize);
+    m_entriesSize = 0;
+    m_initialAlloc = 1;
+    m_entries[0].setNextInFreeList(0);
+}
+
+WeakGCHandle* WeakGCHandlePool::allocate(JSCell* cell)
+{
+    ASSERT(cell);
+    ASSERT(m_entries[0].isNext());
+    unsigned freeList = m_entries[0].getNextInFreeList();
+    ASSERT(freeList < WeakGCHandlePool::numPoolEntries);
+    ASSERT(m_entriesSize < WeakGCHandlePool::numPoolEntries);
+
+    if (m_entriesSize == WeakGCHandlePool::numPoolEntries - 1)
+        return 0;
+
+    if (freeList) {
+        unsigned i = freeList;
+        freeList = m_entries[i].getNextInFreeList();
+        m_entries[i].set(cell);
+        m_entries[0].setNextInFreeList(freeList);
+        ++m_entriesSize;
+        return &m_entries[i];
+    }
+
+    ASSERT(m_initialAlloc < WeakGCHandlePool::numPoolEntries);
+
+    unsigned i = m_initialAlloc;
+    ++m_initialAlloc;
+    m_entries[i].set(cell);
+    ++m_entriesSize;
+    return &m_entries[i];
+
+}
+
+void WeakGCHandlePool::free(WeakGCHandle* handle)
+{
+    ASSERT(handle->pool() == this);
+    ASSERT(m_entries[0].isNext());
+    unsigned freeList = m_entries[0].getNextInFreeList();
+    ASSERT(freeList < WeakGCHandlePool::numPoolEntries);
+    handle->setNextInFreeList(freeList);
+    m_entries[0].setNextInFreeList(handle - m_entries);
+    --m_entriesSize;
+}
+
+}