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/*
* Copyright (C) 2019-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSInternalFieldObjectImpl.h"
namespace JSC {
class JSGenerator final : public JSInternalFieldObjectImpl<6> {
public:
using Base = JSInternalFieldObjectImpl<6>;
// JSGenerator has one inline storage slot, which is pointing internalField(0).
static size_t allocationSize(Checked<size_t> inlineCapacity)
{
ASSERT_UNUSED(inlineCapacity, inlineCapacity == 0U);
return sizeof(JSGenerator);
}
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.generatorSpace<mode>();
}
enum class ResumeMode : int32_t {
NormalMode = 0,
ReturnMode = 1,
ThrowMode = 2
};
enum class State : int32_t {
Completed = -1,
Executing = -2,
Init = 0,
};
// [this], @generator, @generatorState, @generatorValue, @generatorResumeMode, @generatorFrame.
enum class Argument : int32_t {
ThisValue = 0,
Generator = 1,
State = 2,
Value = 3,
ResumeMode = 4,
Frame = 5,
NumberOfArguments = Frame,
};
enum class Field : uint32_t {
// FIXME: JSGenerator should support PolyProto, since generator tends to be created with poly proto mode.
// We reserve the first internal field for PolyProto property. This offset is identical to JSFinalObject's first inline storage slot which will be used for PolyProto.
PolyProto = 0,
State,
Next,
This,
Frame,
Context,
};
static_assert(numberOfInternalFields == 6);
static std::array<JSValue, numberOfInternalFields> initialValues()
{
return { {
jsNull(),
jsNumber(static_cast<int32_t>(State::Init)),
jsUndefined(),
jsUndefined(),
jsUndefined(),
jsUndefined(),
} };
}
static JSGenerator* create(VM&, Structure*);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
DECLARE_VISIT_CHILDREN;
private:
JSGenerator(VM&, Structure*);
void finishCreation(VM&);
};
OVERLOAD_RELATIONAL_OPERATORS_FOR_ENUM_CLASS_WITH_INTEGRALS(JSGenerator::Argument);
} // namespace JSC
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