Retro68/gcc/newlib/libc/machine/nvptx/realloc.c
2022-10-27 20:55:19 +02:00

33 lines
1.0 KiB
C

/*
* Support file for nvptx in newlib.
* Copyright (c) 2016-2018 Mentor Graphics.
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include <stdlib.h>
void *
realloc (void *old_ptr, size_t new_size)
{
void *new_ptr = malloc (new_size);
if (old_ptr && new_ptr)
{
size_t old_size = *(size_t *)((long long *)old_ptr - 1);
size_t copy_size = old_size > new_size ? new_size : old_size;
__builtin_memcpy (new_ptr, old_ptr, copy_size);
free (old_ptr);
}
return new_ptr;
}