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/*
* Copyright (C) 2009 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*/
#ifndef ScopedPersistent_h
#define ScopedPersistent_h
#include <v8.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
template<typename T>
class ScopedPersistent {
WTF_MAKE_NONCOPYABLE(ScopedPersistent);
public:
ScopedPersistent() { }
explicit ScopedPersistent(v8::Handle<T> handle)
: m_handle(v8::Persistent<T>::New(handle))
{
}
~ScopedPersistent()
{
clear();
}
ALWAYS_INLINE v8::Persistent<T> get() const { return m_handle; }
ALWAYS_INLINE v8::Persistent<T> operator->() const { return m_handle; }
bool isEmpty() const { return m_handle.IsEmpty(); }
void set(v8::Handle<T> handle)
{
clear();
m_handle = v8::Persistent<T>::New(handle);
}
void adopt(v8::Persistent<T> handle)
{
clear();
m_handle = handle;
}
// Note: This is clear in the OwnPtr sense, not the v8::Handle sense.
void clear()
{
if (m_handle.IsEmpty())
return;
m_handle.Dispose();
m_handle.Clear();
}
private:
v8::Persistent<T> m_handle;
};
} // namespace WebCore
#endif // ScopedPersistent_h
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