Zoltan Herczeg
6d67b8dff9
Property names were always required a string reference which consumed a large amount of memory for arrays. This patch reduces this consumption by directly storing the value part of certain strings. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* Copyright 2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ECMA_PROPERTY_HASHMAP_H
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#define ECMA_PROPERTY_HASHMAP_H
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmapropertyhashmap Property hashmap
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* @{
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*/
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/**
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* Recommended minimum number of items in a property cache.
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*/
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#define ECMA_PROPERTY_HASMAP_MINIMUM_SIZE 32
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/**
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* Property hash.
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*/
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typedef struct
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{
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ecma_property_header_t header; /**< header of the property */
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uint32_t max_property_count; /**< maximum property count (power of 2) */
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uint32_t null_count; /**< number of NULLs in the map */
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/*
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* The hash is followed by max_property_count ecma_cpointer_t
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* compressed pointers and (max_property_count + 7) / 8 bytes
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* which stores a flag for each compressed pointer.
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*
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* If the compressed pointer is equal to ECMA_NULL_POINTER
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* - flag is cleared if the entry is NULL
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* - flag is set if the entry is deleted
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*
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* If the compressed pointer is not equal to ECMA_NULL_POINTER
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* - flag is cleared if the first entry of a property pair is referenced
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* - flag is set if the second entry of a property pair is referenced
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*/
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} ecma_property_hashmap_t;
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extern void ecma_property_hashmap_create (ecma_object_t *);
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extern void ecma_property_hashmap_free (ecma_object_t *);
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extern void ecma_property_hashmap_insert (ecma_object_t *, ecma_string_t *, ecma_property_pair_t *, int);
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extern void ecma_property_hashmap_delete (ecma_object_t *, jmem_cpointer_t, ecma_property_t *);
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#ifndef CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE
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extern ecma_property_t *ecma_property_hashmap_find (ecma_property_hashmap_t *, ecma_string_t *, jmem_cpointer_t *);
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#endif /* !CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE */
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/**
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* @}
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* @}
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*/
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#endif /* !ECMA_PROPERTY_HASHMAP_H */
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