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     const static unsigned StructureFlags = OverridesHasInstance | Base::StructureFlags;
  40
  41     static JSBoundFunction* create(VM&, JSGlobalObject*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs, int, const String&);
  42
  43     static bool customHasInstance(JSObject*, ExecState*, JSValue);
  44
  45     JSObject* targetFunction() { return m_targetFunction.get(); }
  46     JSValue boundThis() { return m_boundThis.get(); }
  47     JSValue boundArgs() { return m_boundArgs.get(); }
  48
  49     static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  50     {
  51         ASSERT(globalObject);
  52         return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
  53     }
  54
  55     DECLARE_INFO;
  56
  57 protected:
  58     static void visitChildren(JSCell*, SlotVisitor&);
  59
  60 private:
  61     JSBoundFunction(VM&, JSGlobalObject*, Structure*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs);
  62
  63     void finishCreation(VM&, NativeExecutable*, int, const String&);
  64
  65     WriteBarrier<JSObject> m_targetFunction;
  66     WriteBarrier<Unknown> m_boundThis;
  67     WriteBarrier<Unknown> m_boundArgs;
  68 };
  69
  70 } // namespace JSC
  71
  72 #endif // JSFunction_h