1/*
2 * Copyright (C) 2013 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "JSCast.h"
29#include "JSPromise.h"
30#include "Structure.h"
31
32namespace JSC {
33
34class Exception;
35class JSPromiseConstructor;
36class JSFunction;
37
38class JSPromiseDeferred : public JSCell {
39public:
40 typedef JSCell Base;
41 static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
42
43 struct DeferredData {
44 WTF_FORBID_HEAP_ALLOCATION;
45 public:
46 JSPromise* promise { nullptr };
47 JSFunction* resolve { nullptr };
48 JSFunction* reject { nullptr };
49 };
50 static DeferredData createDeferredData(ExecState*, JSGlobalObject*, JSPromiseConstructor*);
51
52 JS_EXPORT_PRIVATE static JSPromiseDeferred* tryCreate(ExecState*, JSGlobalObject*);
53 JS_EXPORT_PRIVATE static JSPromiseDeferred* create(VM&, JSPromise*, JSFunction* resolve, JSFunction* reject);
54
55 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
56 {
57 return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
58 }
59
60 DECLARE_EXPORT_INFO;
61
62 JSPromise* promise() const { return m_promise.get(); }
63 JSFunction* resolve() const { return m_resolve.get(); }
64 JSFunction* reject() const { return m_reject.get(); }
65
66 JS_EXPORT_PRIVATE void resolve(ExecState*, JSValue);
67 JS_EXPORT_PRIVATE void reject(ExecState*, JSValue);
68 JS_EXPORT_PRIVATE void reject(ExecState*, Exception*);
69
70#ifndef NDEBUG
71 void promiseAsyncPending() { m_promiseIsAsyncPending = true; }
72#endif
73
74protected:
75 JSPromiseDeferred(VM&, Structure*);
76 void finishCreation(VM&, JSPromise*, JSFunction* resolve, JSFunction* reject);
77 static void visitChildren(JSCell*, SlotVisitor&);
78
79private:
80 JSPromiseDeferred(VM&);
81
82#ifndef NDEBUG
83 bool m_promiseIsAsyncPending { false };
84#endif
85
86 WriteBarrier<JSPromise> m_promise;
87 WriteBarrier<JSFunction> m_resolve;
88 WriteBarrier<JSFunction> m_reject;
89};
90
91} // namespace JSC
92