75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
/*
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* File : lwp_memheap.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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*/
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#ifndef __LWP_MEMHEAP_H__
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#define __LWP_MEMHEAP_H__
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#include <stdint.h>
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#include <rtthread.h>
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/**
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* memory item on the heap
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*/
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struct rt_lwp_memheap_item
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{
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rt_uint32_t magic; /**< magic number for memheap */
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struct rt_lwp_memheap *pool_ptr; /**< point of pool */
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struct rt_lwp_memheap_item *next; /**< next memheap item */
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struct rt_lwp_memheap_item *prev; /**< prev memheap item */
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struct rt_lwp_memheap_item *next_free; /**< next free memheap item */
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struct rt_lwp_memheap_item *prev_free; /**< prev free memheap item */
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};
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/**
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* Base structure of memory heap object
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*/
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struct rt_lwp_memheap
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{
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struct rt_object parent; /**< inherit from rt_object */
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void *start_addr; /**< pool start address and size */
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rt_uint32_t pool_size; /**< pool size */
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rt_uint32_t available_size; /**< available size */
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rt_uint32_t max_used_size; /**< maximum allocated size */
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struct rt_lwp_memheap_item *block_list; /**< used block list */
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struct rt_lwp_memheap_item *free_list; /**< free block list */
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struct rt_lwp_memheap_item free_header; /**< free block list header */
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struct rt_semaphore lock; /**< semaphore lock */
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rt_list_t mlist;
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};
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extern rt_err_t rt_lwp_memheap_init(struct rt_lwp_memheap *memheap, const char *name, void *start_addr, rt_uint32_t size);
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extern void *rt_lwp_memheap_alloc(struct rt_lwp_memheap *heap, rt_uint32_t size);
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extern void rt_lwp_memheap_free(void *ptr);
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extern void *rt_lwp_memheap_realloc(struct rt_lwp_memheap *heap, void *ptr, rt_size_t newsize);
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extern rt_bool_t rt_lwp_memheap_is_empty(struct rt_lwp_memheap *memheap);
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extern rt_bool_t rt_lwp_memheap_unavailable_size_get(void);
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#endif
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