diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/v8/SharedPersistent.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WebCore/bindings/v8/SharedPersistent.h Fri Sep 17 09:02:29 2010 +0300 @@ -0,0 +1,77 @@ +/* + * 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 SharedPersistent_h +#define SharedPersistent_h + +#include +#include +#include + +namespace WebCore { + + // A shareable reference to a v8 persistent handle. Using a shared + // persistent any number of objects can share a reference to a v8 + // object and when it should no longer be accessible the object's + // owner can clear it. + template + class SharedPersistent : public RefCounted > { + public: + void set(v8::Persistent value) + { + m_value = value; + } + v8::Persistent get() + { + return m_value; + } + void disposeHandle() + { + if (!m_value.IsEmpty()) { + m_value.Dispose(); + m_value.Clear(); + } + } + static PassRefPtr > create(v8::Persistent value) + { + return adoptRef(new SharedPersistent(value)); + } + static PassRefPtr > create() + { + return create(v8::Persistent()); + } + private: + explicit SharedPersistent(v8::Persistent value) : m_value(value) { } + v8::Persistent m_value; + }; + +} // namespace WebCore + +#endif // SharedPersistent_h