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GeneratorObject.cpp
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108 lines (89 loc) · 4.58 KB
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/*
* Copyright (c) 2019-present Samsung Electronics Co., Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include "Escargot.h"
#include "GeneratorObject.h"
#include "interpreter/ByteCodeInterpreter.h"
#include "Context.h"
#include "Environment.h"
#include "EnvironmentRecord.h"
#include "IteratorObject.h"
namespace Escargot {
GeneratorObject::GeneratorObject(ExecutionState& state, Object* proto, ExecutionState* executionState, Value* registerFile, ByteCodeBlock* blk)
: Object(state, proto)
, m_generatorState(GeneratorState::SuspendedStart)
, m_executionPauser(state, this, executionState, registerFile, blk)
{
}
void* GeneratorObject::operator new(size_t size)
{
ASSERT(size == sizeof(GeneratorObject));
static MAY_THREAD_LOCAL bool typeInited = false;
static MAY_THREAD_LOCAL GC_descr descr;
if (!typeInited) {
GC_word obj_bitmap[GC_BITMAP_SIZE(GeneratorObject)] = { 0 };
fillGCDescriptor(obj_bitmap);
descr = GC_make_descriptor(obj_bitmap, GC_WORD_LEN(GeneratorObject));
typeInited = true;
}
return GC_MALLOC_EXPLICITLY_TYPED(size, descr);
}
// https://www.ecma-international.org/ecma-262/6.0/#sec-generatorvalidate
GeneratorObject* GeneratorObject::generatorValidate(ExecutionState& state, const Value& generator)
{
if (!generator.isObject()) {
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, ErrorObject::Messages::GlobalObject_ThisNotObject);
}
if (!generator.asObject()->isGeneratorObject()) {
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, state.context()->staticStrings().Generator.string(), true, state.context()->staticStrings().next.string(), ErrorObject::Messages::GlobalObject_CalledOnIncompatibleReceiver);
}
GeneratorObject* gen = generator.asObject()->asGeneratorObject();
if (gen->generatorState() == GeneratorObject::GeneratorState::Executing) {
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "Generator is already running");
}
return gen;
}
// https://www.ecma-international.org/ecma-262/6.0/#sec-generatorresume
Value GeneratorObject::generatorResume(ExecutionState& state, const Value& generator, const Value& value)
{
GeneratorObject* gen = generatorValidate(state, generator);
if (gen->m_generatorState >= GeneratorObject::GeneratorState::CompletedReturn) {
return IteratorObject::createIterResultObject(state, Value(), true);
}
ASSERT(gen->m_generatorState == GeneratorObject::GeneratorState::SuspendedStart || gen->m_generatorState == GeneratorObject::GeneratorState::SuspendedYield);
gen->m_generatorState = GeneratorObject::GeneratorState::Executing;
return ExecutionPauser::start(state, gen->executionPauser(), gen, value, false, false, ExecutionPauser::Generator);
}
// https://www.ecma-international.org/ecma-262/6.0/#sec-generatorresumeabrupt
Value GeneratorObject::generatorResumeAbrupt(ExecutionState& state, const Value& generator, const Value& value, GeneratorObject::GeneratorAbruptType type)
{
GeneratorObject* gen = generatorValidate(state, generator);
if (gen->m_generatorState == GeneratorObject::GeneratorState::SuspendedStart) {
gen->m_generatorState = GeneratorObject::GeneratorState::CompletedReturn;
}
if (gen->generatorState() >= GeneratorObject::GeneratorState::CompletedReturn) {
if (type == GeneratorObject::GeneratorAbruptType::Return) {
return IteratorObject::createIterResultObject(state, value, true);
}
state.throwException(value);
}
ASSERT(gen->generatorState() == GeneratorObject::GeneratorState::SuspendedYield);
gen->m_generatorState = GeneratorObject::GeneratorState::Executing;
return ExecutionPauser::start(state, gen->executionPauser(), gen, value, type == GeneratorObject::GeneratorAbruptType::Return, type == GeneratorObject::GeneratorAbruptType::Throw, ExecutionPauser::Generator);
}
} // namespace Escargot