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      1 /*
      2  * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "ScriptInstance.h"
     33 
     34 #ifndef NDEBUG
     35 #include "V8Proxy.h"
     36 #endif
     37 #include <wtf/Assertions.h>
     38 
     39 namespace WebCore {
     40 
     41 V8ScriptInstance::V8ScriptInstance()
     42 {
     43 }
     44 
     45 V8ScriptInstance::V8ScriptInstance(v8::Handle<v8::Object> instance)
     46 {
     47     set(instance);
     48 }
     49 
     50 V8ScriptInstance::~V8ScriptInstance()
     51 {
     52     clear();
     53 }
     54 
     55 v8::Persistent<v8::Object> V8ScriptInstance::instance()
     56 {
     57     return m_instance;
     58 }
     59 
     60 void V8ScriptInstance::clear()
     61 {
     62     if (m_instance.IsEmpty())
     63         return;
     64 #ifndef NDEBUG
     65     V8GCController::unregisterGlobalHandle(this, m_instance);
     66 #endif
     67     m_instance.Dispose();
     68     m_instance.Clear();
     69 }
     70 
     71 void V8ScriptInstance::set(v8::Handle<v8::Object> instance)
     72 {
     73     clear();
     74     if (instance.IsEmpty())
     75         return;
     76 
     77     m_instance = v8::Persistent<v8::Object>::New(instance);
     78 #ifndef NDEBUG
     79     V8GCController::registerGlobalHandle(SCRIPTINSTANCE, this, m_instance);
     80 #endif
     81 }
     82 
     83 } // namespace WebCore
     84