runtime/JSBoundFunction.h

   1 /*
   2  * Copyright (C) 2011 Apple 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 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 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 JSBoundFunction_h
  27 #define JSBoundFunction_h
  28
  29 #include "JSFunction.h"
  30
  31 namespace JSC {
  32
  33 EncodedJSValue JSC_HOST_CALL boundFunctionCall(ExecState*);
  34 EncodedJSValue JSC_HOST_CALL boundFunctionConstruct(ExecState*);
  35
  36 class JSBoundFunction : public JSFunction {
  37 public:
  38     typedef JSFunction Base;
  39
  40     static JSBoundFunction* create(ExecState*, JSGlobalObject*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs, int, const Identifier&);
  41
  42     static bool hasInstance(JSObject*, ExecState*, JSValue, JSValue proto);
  43
  44     JSObject* targetFunction() { return m_targetFunction.get(); }
  45     JSValue boundThis() { return m_boundThis.get(); }
  46     JSValue boundArgs() { return m_boundArgs.get(); }
  47
  48     static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
  49     {
  50         ASSERT(globalObject);
  51         return Structure::create(globalData, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), &s_info);
  52     }
  53
  54     static const ClassInfo s_info;
  55
  56 protected:
  57     const static unsigned StructureFlags = OverridesHasInstance | OverridesVisitChildren | Base::StructureFlags;
  58
  59     static void visitChildren(JSCell*, SlotVisitor&);
  60
  61 private:
  62     JSBoundFunction(ExecState*, JSGlobalObject*, Structure*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs);
  63
  64     void finishCreation(ExecState*, NativeExecutable*, int, const Identifier&);
  65
  66     WriteBarrier<JSObject> m_targetFunction;
  67     WriteBarrier<Unknown> m_boundThis;
  68     WriteBarrier<Unknown> m_boundArgs;
  69 };
  70
  71 } // namespace JSC
  72
  73 #endif // JSFunction_h