1  /*
 2   * Copyright (C) 2006-2019 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 JSCallbackFunction_h
27  #define JSCallbackFunction_h
28  
29  #include "InternalFunction.h"
30  #include "JSObjectRef.h"
31  
32  namespace JSC {
33  
34  class JSCallbackFunction final : public InternalFunction {
35      friend struct APICallbackFunction;
36  public:
37      typedef InternalFunction Base;
38  
39      template<typename CellType, SubspaceAccess mode>
40      static IsoSubspace* subspaceFor(VM& vm)
41      {
42          return vm.callbackFunctionSpace<mode>();
43      }
44  
45      static JSCallbackFunction* create(VM&, JSGlobalObject*, JSObjectCallAsFunctionCallback, const String& name);
46  
47      DECLARE_INFO;
48      
49      // InternalFunction mish-mashes constructor and function behavior -- we should 
50      // refactor the code so this override isn't necessary
51      static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) 
52      { 
53          return Structure::create(vm, globalObject, proto, TypeInfo(InternalFunctionType, StructureFlags), info()); 
54      }
55  
56  private:
57      JSCallbackFunction(VM&, Structure*, JSObjectCallAsFunctionCallback);
58      void finishCreation(VM&, const String& name);
59  
60      JSObjectCallAsFunctionCallback functionCallback() { return m_callback; }
61  
62      JSObjectCallAsFunctionCallback m_callback { nullptr };
63  };
64  
65  } // namespace JSC
66  
67  #endif // JSCallbackFunction_h