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      1 /*
      2  * Copyright (C) 2004 Apple Computer, 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef RUNTIME_ROOT_H_
     27 #define RUNTIME_ROOT_H_
     28 
     29 #if PLATFORM(MAC)
     30 #include "jni_jsobject.h"
     31 #endif
     32 #include <heap/Strong.h>
     33 
     34 #include <runtime/WeakGCMap.h>
     35 #include <wtf/Forward.h>
     36 #include <wtf/Noncopyable.h>
     37 #include <wtf/PassRefPtr.h>
     38 #include <wtf/RefCounted.h>
     39 
     40 namespace JSC {
     41 
     42 class Interpreter;
     43 class JSGlobalObject;
     44 
     45 namespace Bindings {
     46 
     47 class RootObject;
     48 class RuntimeObject;
     49 
     50 typedef HashCountedSet<JSObject*> ProtectCountSet;
     51 
     52 extern RootObject* findProtectingRootObject(JSObject*);
     53 extern RootObject* findRootObject(JSGlobalObject*);
     54 
     55 class RootObject : public RefCounted<RootObject> {
     56     friend class JavaJSObject;
     57 
     58 public:
     59     ~RootObject();
     60 
     61     static PassRefPtr<RootObject> create(const void* nativeHandle, JSGlobalObject*);
     62 
     63     bool isValid() { return m_isValid; }
     64     void invalidate();
     65 
     66     void gcProtect(JSObject*);
     67     void gcUnprotect(JSObject*);
     68     bool gcIsProtected(JSObject*);
     69 
     70     const void* nativeHandle() const;
     71     JSGlobalObject* globalObject() const;
     72     void updateGlobalObject(JSGlobalObject*);
     73 
     74     void addRuntimeObject(JSGlobalData&, RuntimeObject*);
     75     void removeRuntimeObject(RuntimeObject*);
     76 
     77     struct InvalidationCallback {
     78         virtual void operator()(RootObject*) = 0;
     79         virtual ~InvalidationCallback();
     80     };
     81     void addInvalidationCallback(InvalidationCallback* callback) { m_invalidationCallbacks.add(callback); }
     82 
     83 private:
     84     RootObject(const void* nativeHandle, JSGlobalObject*);
     85 
     86     bool m_isValid;
     87 
     88     const void* m_nativeHandle;
     89     Strong<JSGlobalObject> m_globalObject;
     90 
     91     ProtectCountSet m_protectCountSet;
     92     WeakGCMap<RuntimeObject*, RuntimeObject> m_runtimeObjects; // Really need a WeakGCSet, but this will do.
     93 
     94     HashSet<InvalidationCallback*> m_invalidationCallbacks;
     95 };
     96 
     97 } // namespace Bindings
     98 
     99 } // namespace JSC
    100 
    101 #endif // RUNTIME_ROOT_H_
    102