1  /*
 2   * Copyright (C) 2017 Oleksandr Skachkov <gskachkov@gmail.com>.
 3   * Copyright (C) 2018 Apple Inc. All rights reserved.
 4   *
 5   * Redistribution and use in source and binary forms, with or without
 6   * modification, are permitted provided that the following conditions
 7   * are met:
 8   * 1. Redistributions of source code must retain the above copyright
 9   *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   *
14   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24   * THE POSSIBILITY OF SUCH DAMAGE.
25   */
26  
27  #pragma once
28  
29  #include "JSFunction.h"
30  
31  namespace JSC {
32  
33  class JSAsyncGeneratorFunction final : public JSFunction {
34      friend class JIT;
35      friend class VM;
36  public:
37      using Base = JSFunction;
38  
39      static constexpr unsigned StructureFlags = Base::StructureFlags;
40  
41      DECLARE_EXPORT_INFO;
42  
43      static JSAsyncGeneratorFunction* create(VM&, FunctionExecutable*, JSScope*);
44      static JSAsyncGeneratorFunction* create(VM&, FunctionExecutable*, JSScope*, Structure*);
45      static JSAsyncGeneratorFunction* createWithInvalidatedReallocationWatchpoint(VM&, FunctionExecutable*, JSScope*);
46  
47      static size_t allocationSize(size_t inlineCapacity)
48      {
49          ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
50          return sizeof(JSAsyncGeneratorFunction);
51      }
52  
53      static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
54      {
55          ASSERT(globalObject);
56          return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
57      }
58  
59  private:
60      JSAsyncGeneratorFunction(VM&, FunctionExecutable*, JSScope*, Structure*);
61  
62      static JSAsyncGeneratorFunction* createImpl(VM&, FunctionExecutable*, JSScope*, Structure*);
63  };
64  static_assert(sizeof(JSAsyncGeneratorFunction) == sizeof(JSFunction), "Some subclasses of JSFunction should be the same size to share IsoSubspace");
65  
66  } // namespace JSC