rt-thread-official/examples/libc/memory.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
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*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2010-11-17 Bernard first version
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*/
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#include <stdio.h>
#include <stdlib.h>
#include <finsh.h>
#include <errno.h>
static int errors = 0;
static void merror(const char *msg)
{
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++errors;
printf("Error: %s\n", msg);
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}
int libc_mem(void)
{
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void *p;
int save;
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errno = 0;
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p = malloc(-1);
save = errno;
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if (p != NULL)
merror("malloc (-1) succeeded.");
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if (p == NULL && save != ENOMEM)
merror("errno is not set correctly");
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p = malloc(10);
if (p == NULL)
merror("malloc (10) failed.");
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/* realloc (p, 0) == free (p). */
p = realloc(p, 0);
if (p != NULL)
merror("realloc (p, 0) failed.");
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p = malloc(0);
if (p == NULL)
{
printf("malloc(0) returns NULL\n");
}
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p = realloc(p, 0);
if (p != NULL)
merror("realloc (p, 0) failed.");
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return errors != 0;
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}
FINSH_FUNCTION_EXPORT(libc_mem, memory test for libc);