C++ (Cpp) rt_memheap_realloc Examples

Example #1

File: memheap.c Project: aspirefhaha/smartcontroller_rtthread

void *rt_realloc(void *rmem, rt_size_t newsize)
{
    void *new_ptr;
    struct rt_memheap_item *header_ptr;

    if (rmem == RT_NULL)
        return rt_malloc(newsize);

    /* get old memory item */
    header_ptr = (struct rt_memheap_item *)
                 ((rt_uint8_t *)rmem - RT_MEMHEAP_SIZE);

    new_ptr = rt_memheap_realloc(header_ptr->pool_ptr, rmem, newsize);
    if (new_ptr == RT_NULL && newsize != 0)
    {
        /* allocate memory block from other memheap */
        new_ptr = rt_malloc(newsize);
        if (new_ptr != RT_NULL && rmem != RT_NULL)
        {
            rt_size_t oldsize;

            /* get the size of old memory block */
            oldsize = MEMITEM_SIZE(header_ptr);
            if (newsize > oldsize)
                rt_memcpy(new_ptr, rmem, oldsize);
            else
                rt_memcpy(new_ptr, rmem, newsize);
        }
    }

    return new_ptr;
}

Example #2

File: drv_sram.c Project: AubrCool/rt-thread-lpc408x

void *sram_realloc(void *ptr, unsigned long size)
{
    return rt_memheap_realloc(&system_heap, ptr, size);
}