138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/* source/mm/bump/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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* WARNING: This memory allocator is not support free operation, if you free the memory, the memory will be corrupted.
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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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static void *bump_mem_start = NULL;
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static size_t bump_mem_offset = 0;
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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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bump_mem_start = mem_start;
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mem.total_size += len;
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mem.free_size = mem.total_size;
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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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SGL_UNUSED(mem_start);
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SGL_UNUSED(len);
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SGL_LOG_ERROR("sgl_mm_add_pool is not supported");
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SGL_ASSERT(0);
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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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void* sgl_malloc(size_t size)
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{
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uint8_t *ptr = (uint8_t*)bump_mem_start;
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if (size == 0 || (bump_mem_offset + size) > mem.total_size) {
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return NULL;
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}
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ptr += bump_mem_offset;
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bump_mem_offset += size;
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mem.used_size += size;
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mem.free_size -= size;
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return (void*)ptr;
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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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void* sgl_realloc(void *p, size_t size)
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{
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SGL_UNUSED(p);
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SGL_UNUSED(size);
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SGL_LOG_ERROR("sgl_realloc is not supported");
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SGL_ASSERT(0);
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return NULL;
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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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void sgl_free(void *p)
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{
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SGL_UNUSED(p);
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SGL_LOG_ERROR("sgl_free is not supported");
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SGL_ASSERT(0);
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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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