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
31namespace JSC {
32
33class JSAsyncGeneratorFunction final : public JSFunction {
34 friend class JIT;
35 friend class VM;
36public:
37 using Base = JSFunction;
38
39 const static unsigned StructureFlags = Base::StructureFlags;
40
41 template<typename CellType, SubspaceAccess>
42 static IsoSubspace* subspaceFor(VM& vm)
43 {
44 return &vm.functionSpace;
45 }
46
47 DECLARE_EXPORT_INFO;
48
49 static JSAsyncGeneratorFunction* create(VM&, FunctionExecutable*, JSScope*);
50 static JSAsyncGeneratorFunction* create(VM&, FunctionExecutable*, JSScope*, Structure*);
51 static JSAsyncGeneratorFunction* createWithInvalidatedReallocationWatchpoint(VM&, FunctionExecutable*, JSScope*);
52
53 static size_t allocationSize(size_t inlineCapacity)
54 {
55 ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
56 return sizeof(JSAsyncGeneratorFunction);
57 }
58
59 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
60 {
61 ASSERT(globalObject);
62 return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
63 }
64
65 enum class AsyncGeneratorState : int32_t {
66 Completed = -1,
67 Executing = -2,
68 SuspendedStart = -3,
69 SuspendedYield = -4,
70 AwaitingReturn = -5
71 };
72
73 enum class AsyncGeneratorSuspendReason : int32_t {
74 None = 0,
75 Yield = -1,
76 Await = -2
77 };
78private:
79 JSAsyncGeneratorFunction(VM&, FunctionExecutable*, JSScope*, Structure*);
80
81 static JSAsyncGeneratorFunction* createImpl(VM&, FunctionExecutable*, JSScope*, Structure*);
82};
83static_assert(sizeof(JSAsyncGeneratorFunction) == sizeof(JSFunction), "Some subclasses of JSFunction should be the same size to share IsoSubspace");
84
85} // namespace JSC
86