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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 "wtf/Noncopyable.h"
#include <v8.h>
namespace blink {
template<typename T>
class ScopedPersistent {
WTF_MAKE_NONCOPYABLE(ScopedPersistent);
public:
ScopedPersistent() { }
ScopedPersistent(v8::Isolate* isolate, v8::Handle<T> handle)
: m_handle(isolate, handle)
{
}
~ScopedPersistent()
{
clear();
}
ALWAYS_INLINE v8::Local<T> newLocal(v8::Isolate* isolate) const
{
return v8::Local<T>::New(isolate, m_handle);
}
template<typename P>
void setWeak(P* parameters, void (*callback)(const v8::WeakCallbackData<T, P>&))
{
m_handle.SetWeak(parameters, callback);
}
bool isEmpty() const { return m_handle.IsEmpty(); }
bool isWeak() const { return m_handle.IsWeak(); }
void set(v8::Isolate* isolate, v8::Handle<T> handle)
{
m_handle.Reset(isolate, handle);
}
// Note: This is clear in the OwnPtr sense, not the v8::Handle sense.
void clear()
{
m_handle.Reset();
}
bool operator==(const ScopedPersistent<T>& other)
{
return m_handle == other.m_handle;
}
template <class S>
bool operator==(const v8::Handle<S> other) const
{
return m_handle == other;
}
private:
// FIXME: This function does an unsafe handle access. Remove it.
friend class V8AbstractEventListener;
friend class V8PerIsolateData;
ALWAYS_INLINE v8::Persistent<T>& getUnsafe()
{
return m_handle;
}
v8::Persistent<T> m_handle;
};
} // namespace blink
#endif // ScopedPersistent_h
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