arkcompiler_ets_runtime/ecmascript/ecma_string_table.h
xiongluo cf451e377d constant string optimization
Signed-off-by: xiongluo <xiongluo@huawei.com>
Change-Id: Ieabea29874752fed615b0a911cf4118e791663eb
2023-05-08 17:07:03 +08:00

75 lines
2.8 KiB
C++

/*
* Copyright (c) 2021 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ECMASCRIPT_STRING_TABLE_H
#define ECMASCRIPT_STRING_TABLE_H
#include "ecmascript/mem/c_containers.h"
#include "ecmascript/mem/space.h"
#include "ecmascript/mem/visitor.h"
namespace panda::ecmascript {
class EcmaString;
class EcmaVM;
class JSPandaFile;
class EcmaStringTable {
public:
explicit EcmaStringTable(const EcmaVM *vm);
virtual ~EcmaStringTable()
{
table_.clear();
}
void InternEmptyString(EcmaString *emptyStr);
EcmaString *GetOrInternString(const JSHandle<EcmaString> &firstString, const JSHandle<EcmaString> &secondString);
EcmaString *GetOrInternString(const uint8_t *utf8Data, uint32_t utf8Len, bool canBeCompress);
EcmaString *CreateAndInternStringNonMovable(const uint8_t *utf8Data, uint32_t utf8Len);
EcmaString *GetOrInternString(const uint16_t *utf16Data, uint32_t utf16Len, bool canBeCompress);
EcmaString *GetOrInternString(EcmaString *string);
EcmaString *GetOrInternStringWithSpaceType(const uint8_t *utf8Data, uint32_t utf8Len, bool canBeCompress,
MemSpaceType type, bool isConstantString, uint32_t idOffset);
EcmaString *GetOrInternStringWithSpaceType(const uint16_t *utf16Data, uint32_t utf16Len, bool canBeCompress,
MemSpaceType type);
void SweepWeakReference(const WeakRootVisitor &visitor);
bool CheckStringTableValidity();
private:
NO_COPY_SEMANTIC(EcmaStringTable);
NO_MOVE_SEMANTIC(EcmaStringTable);
EcmaString *GetString(const JSHandle<EcmaString> &firstString, const JSHandle<EcmaString> &secondString) const;
EcmaString *GetString(const uint8_t *utf8Data, uint32_t utf8Len, bool canBeCompress) const;
EcmaString *GetString(const uint16_t *utf16Data, uint32_t utf16Len) const;
EcmaString *GetString(EcmaString *string) const;
void InternString(EcmaString *string);
void InsertStringIfNotExist(EcmaString *string)
{
EcmaString *str = GetString(string);
if (str == nullptr) {
InternString(string);
}
}
CUnorderedMultiMap<uint32_t, EcmaString *> table_;
const EcmaVM *vm_{nullptr};
friend class SnapshotProcessor;
};
} // namespace panda::ecmascript
#endif // ECMASCRIPT_STRING_TABLE_H