142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/* source/mm/other/sgl_mm.c
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*
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* MIT License
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*
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* Copyright(c) 2023-present All contributors of SGL
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* Document reference link: https://sgl-docs.readthedocs.io
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* @file sgl_mm.c
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* @brief SGL Memory Management - Default (weak) implementations
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*
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* @warning DO NOT MODIFY THIS FILE!
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*
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* This file provides default weak implementations of the memory management
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* functions. These functions use the standard C library (malloc/free/realloc).
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*
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* To customize memory management for your platform:
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* 1. Create your own implementation file in your project
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* 2. Define the same functions WITHOUT the weak attribute
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* 3. Your implementation will automatically override these defaults
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*
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* Functions available for override:
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* - void* sgl_mm_alloc(size_t size)
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* - void sgl_mm_free(void *ptr)
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* - void* sgl_mm_realloc(void *ptr, size_t size)
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*
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* Example (in your application code):
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* @code
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* void* sgl_mm_alloc(size_t size) {
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* return my_custom_allocator(size);
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* }
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* @endcode
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*/
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#include <stdint.h>
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#include <sgl_mm.h>
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#include <sgl_log.h>
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#include <sgl_cfgfix.h>
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#include <stdlib.h>
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#include <string.h>
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static sgl_mm_monitor_t mem = {
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.total_size = 0,
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.free_size = 0,
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.used_size = 0,
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};
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/**
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* @brief initialize memory pool
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* @param mem_start start address of memory pool
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* @param len length of memory pool
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*/
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void sgl_mm_init(void *mem_start, size_t len)
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{
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mem.total_size += len;
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}
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/**
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* @brief add memory pool
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* @param mem_start start address of memory pool
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* @param len length of memory pool
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*/
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void sgl_mm_add_pool(void *mem_start, size_t len)
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{
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mem.total_size += len;
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}
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/**
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* @brief memory alloc, the function is unsafe, you should ensure that
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* the requested size is smaller than the free size of memory
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*
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* @param size request size of memory
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*
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* @return point to request memory address
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*/
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sgl_weak_fn void* sgl_malloc(size_t size)
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{
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void *p = malloc(size);
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memset(p, 0, size);
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return p;
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}
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/**
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* @brief memory realloc, the function is unsafe, you should ensure that
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* the requested size is smaller than the free size of memory
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* @param p the pointer of request size of memory
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* @param size request size of memory
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*/
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sgl_weak_fn void* sgl_realloc(void *p, size_t size)
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{
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return realloc(p, size);
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}
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/**
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* @brief memory free
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*
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* @param p the pointer of request size of memory
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*
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* @return none
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*/
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sgl_weak_fn void sgl_free(void *p)
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{
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//mem.used_size -= ;
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free(p);
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}
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sgl_mm_monitor_t sgl_mm_get_monitor(void)
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{
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int integer = (mem.used_size * 100) / mem.total_size;
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int decimal = (mem.used_size * 10000) / mem.total_size - (integer * 100);
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mem.used_rate = integer << 8 | decimal;
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mem.free_size = mem.total_size - mem.used_size;
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return mem;
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}
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