Add webkit to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 213 insertions, 0 deletions

diff --git a/webkit/pending/TreeShared.h b/webkit/pending/TreeShared.h
new file mode 100644
index 0000000..377f381
--- /dev/null
+++ b/webkit/pending/TreeShared.h
@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef TreeShared_h
+#define TreeShared_h
+
+#include "RefCounted.h"
+
+namespace WebCore {
+
+#if USE(V8_BINDING)
+
+template<class T> class TreeShared : public Peerable, Noncopyable {
+public:
+    TreeShared() : m_refCount(0), m_parent(0), m_peer(0)
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = false;
+        m_inRemovedLastRefFunction = false;
+#endif
+    }
+
+    TreeShared(T* parent) : m_refCount(0), m_parent(parent), m_peer(0)
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = false;
+        m_inRemovedLastRefFunction = false;
+#endif
+    }
+
+    virtual ~TreeShared()
+    { 
+        ASSERT(m_deletionHasBegun);
+        ASSERT(!m_peer);
+    }
+
+    void ref()
+    {
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+        ++m_refCount;
+    }
+
+    void deref() 
+    { 
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+
+        if (--m_refCount <= 0 && !m_parent && !m_peer) {
+#ifndef NDEBUG
+            m_inRemovedLastRefFunction = true;
+#endif
+            removedLastRef();
+        } 
+    }
+
+    void setPeer(void* peer) 
+    {
+        m_peer = peer;
+        if (m_refCount <= 0 && !m_parent && !m_peer) {
+#ifndef NDEBUG
+            m_inRemovedLastRefFunction = true;
+#endif
+            removedLastRef();
+        }
+    }
+
+    void* peer() const { return m_peer; }
+
+    bool hasOneRef()
+    {
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+        if (m_peer)
+            return m_refCount == 0;
+        return m_refCount == 1; 
+    }
+
+    int refCount() const
+    {
+        if (m_peer)
+            return m_refCount + 1;
+        return m_refCount; 
+    }
+
+    // setParent never deletes the node even if the node only has a
+    // parent and no other references.  For DOM nodes the deletion
+    // done in ContainerNode::removeAllChildren.
+    void setParent(T* parent) { m_parent = parent; }
+    T* parent() const { return m_parent; }
+
+#ifndef NDEBUG
+    bool m_deletionHasBegun;
+    bool m_inRemovedLastRefFunction;
+#endif
+
+private:
+    virtual void removedLastRef()
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = true;
+#endif
+        delete static_cast<T*>(this);
+    }
+
+    int m_refCount;
+    T* m_parent;
+    void* m_peer;
+};
+
+#elif USE(JAVASCRIPTCORE_BINDINGS)
+
+template<class T> class TreeShared : Noncopyable {
+public:
+    TreeShared()
+        : m_refCount(0)
+        , m_parent(0)
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = false;
+        m_inRemovedLastRefFunction = false;
+#endif
+    }
+    TreeShared(T* parent)
+        : m_refCount(0)
+        , m_parent(0)
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = false;
+        m_inRemovedLastRefFunction = false;
+#endif
+    }
+    virtual ~TreeShared()
+    {
+        ASSERT(m_deletionHasBegun);
+    }
+
+    void ref()
+    {
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+        ++m_refCount;
+    }
+
+    void deref()
+    {
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+        if (--m_refCount <= 0 && !m_parent) {
+#ifndef NDEBUG
+            m_inRemovedLastRefFunction = true;
+#endif
+            removedLastRef();
+        }
+    }
+
+    bool hasOneRef() const
+    {
+        ASSERT(!m_deletionHasBegun);
+        ASSERT(!m_inRemovedLastRefFunction);
+        return m_refCount == 1;
+    }
+
+    int refCount() const
+    {
+        return m_refCount;
+    }
+
+    void setParent(T* parent) { m_parent = parent; }
+    T* parent() const { return m_parent; }
+
+#ifndef NDEBUG
+    bool m_deletionHasBegun;
+    bool m_inRemovedLastRefFunction;
+#endif
+
+private:
+    virtual void removedLastRef()
+    {
+#ifndef NDEBUG
+        m_deletionHasBegun = true;
+#endif
+        delete this;
+    }
+
+    int m_refCount;
+    T* m_parent;
+};
+
+#else
+#error "You must include config.h before TreeShared.h"
+#endif
+
+}
+
+#endif // TreeShared.h