JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / runtime / StructureChain.h

diff --git a/runtime/StructureChain.h b/runtime/StructureChain.h
index 795e6494a7b72cb716db3f247de203f7ad0f19a1..0fbd1e20773e6c46b2482e802bc41d656867988d 100644 (file)
--- a/runtime/StructureChain.h
+++ b/runtime/StructureChain.h
@@ -10,10 +10,10 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *

- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * 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 APPLE COMPUTER, INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. 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
  * 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


@@ -26,25 +26,67 @@
 #ifndef StructureChain_h
 #define StructureChain_h
 
 #ifndef StructureChain_h
 #define StructureChain_h
 

-#include <wtf/OwnArrayPtr.h>
+#include "JSCell.h"
+#include "JSObject.h"
+#include "Structure.h"
+

 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>

+#include <wtf/StdLibExtras.h>

 
 namespace JSC {
 
 
 namespace JSC {
 

-    class Structure;
+class LLIntOffsetsExtractor;
+class Structure;
+
+class StructureChain final : public JSCell {
+    friend class JIT;
+
+public:
+    typedef JSCell Base;
+    static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
+
+    static StructureChain* create(VM& vm, Structure* head)
+    { 
+        StructureChain* chain = new (NotNull, allocateCell<StructureChain>(vm.heap)) StructureChain(vm, vm.structureChainStructure.get());
+        chain->finishCreation(vm, head);
+        return chain;
+    }
+    WriteBarrier<Structure>* head() { return m_vector.get(); }
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+    {
+        return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
+    }
+
+    DECLARE_INFO;
+
+    static const bool needsDestruction = true;
+    static void destroy(JSCell*);
+
+protected:
+    void finishCreation(VM& vm, Structure* head)
+    {
+        Base::finishCreation(vm);
+        size_t size = 0;
+        for (Structure* current = head; current; current = current->storedPrototype().isNull() ? 0 : asObject(current->storedPrototype())->structure())
+            ++size;
+
+        m_vector = std::make_unique<WriteBarrier<Structure>[]>(size + 1);

 
 

-    class StructureChain : public RefCounted<StructureChain> {
-    public:
-        static PassRefPtr<StructureChain> create(Structure* head) { return adoptRef(new StructureChain(head)); }
-        RefPtr<Structure>* head() { return m_vector.get(); }
+        size_t i = 0;
+        for (Structure* current = head; current; current = current->storedPrototype().isNull() ? 0 : asObject(current->storedPrototype())->structure())
+            m_vector[i++].set(vm, this, current);
+    }

 
 

-    private:
-        StructureChain(Structure* head);
+private:
+    friend class LLIntOffsetsExtractor;

 
 

-        OwnArrayPtr<RefPtr<Structure> > m_vector;
-    };
+    StructureChain(VM&, Structure*);
+    std::unique_ptr<WriteBarrier<Structure>[]> m_vector;
+};

 
 } // namespace JSC
 
 
 } // namespace JSC