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https://github.com/jerryscript-project/jerryscript.git
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81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
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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 JERRY_MEM_POOL_INTERNAL
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#error "Please, use mem_poolman.h instead of mem_pool.h"
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#endif
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#ifndef JERRY_MEM_POOL_H
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#define JERRY_MEM_POOL_H
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#include "mem-config.h"
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#include "mem-heap.h"
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/** \addtogroup pool Memory pool
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* @{
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*/
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/**
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* Size of a pool (header + chunks)
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*/
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#define MEM_POOL_SIZE \
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((size_t) JERRY_MIN (sizeof (mem_pool_state_t) + (1ull << MEM_POOL_MAX_CHUNKS_NUMBER_LOG) * MEM_POOL_CHUNK_SIZE, \
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JERRY_ALIGNDOWN (mem_heap_recommend_allocation_size (sizeof (mem_pool_state_t) + \
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CONFIG_MEM_LEAST_CHUNK_NUMBER_IN_POOL * \
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MEM_POOL_CHUNK_SIZE) \
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- sizeof (mem_pool_state_t), \
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MEM_POOL_CHUNK_SIZE)) + sizeof (mem_pool_state_t))
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/**
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* Number of chunks in a pool
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*/
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#define MEM_POOL_CHUNKS_NUMBER ((MEM_POOL_SIZE - sizeof (mem_pool_state_t)) / MEM_POOL_CHUNK_SIZE)
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/**
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* Get pool's space size
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*/
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#define MEM_POOL_SPACE_START(pool_header_p) ((uint8_t*) ((mem_pool_state_t*) pool_header_p + 1))
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/**
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* Index of chunk in a pool
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*/
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typedef uint8_t mem_pool_chunk_index_t;
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/**
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* State of a memory pool
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*/
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typedef struct __attribute__ ((aligned (MEM_ALIGNMENT))) mem_pool_state_t
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{
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/** Offset of first free chunk from the beginning of the pool (mem_pool_chunk_index_t) */
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mem_pool_chunk_index_t first_free_chunk : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
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/** Number of free chunks (mem_pool_chunk_index_t) */
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mem_pool_chunk_index_t free_chunks_number : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
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/** Pointer to the next pool with same chunk size */
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mem_cpointer_t next_pool_cp : MEM_CP_WIDTH;
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} mem_pool_state_t;
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extern void mem_pool_init (mem_pool_state_t *pool_p, size_t pool_size);
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extern uint8_t* mem_pool_alloc_chunk (mem_pool_state_t *pool_p);
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extern void mem_pool_free_chunk (mem_pool_state_t *pool_p, uint8_t *chunk_p);
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extern bool __attr_const___ mem_pool_is_chunk_inside (mem_pool_state_t *pool_p, uint8_t *chunk_p);
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/**
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* @}
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*/
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#endif /* JERRY_MEM_POOL_H */
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