rt-thread/examples/libc/memory.c

57 lines
876 B
C

/*
* memory.c
*
* Created on: 2010-11-17
* Author: bernard
*/
#include <stdio.h>
#include <stdlib.h>
#include <finsh.h>
#include <errno.h>
static int errors = 0;
static void merror(const char *msg)
{
++errors;
printf("Error: %s\n", msg);
}
int libc_mem(void)
{
void *p;
int save;
errno = 0;
p = malloc(-1);
save = errno;
if (p != NULL)
merror("malloc (-1) succeeded.");
if (p == NULL && save != ENOMEM)
merror("errno is not set correctly");
p = malloc(10);
if (p == NULL)
merror("malloc (10) failed.");
/* realloc (p, 0) == free (p). */
p = realloc(p, 0);
if (p != NULL)
merror("realloc (p, 0) failed.");
p = malloc(0);
if (p == NULL)
{
printf("malloc(0) returns NULL\n");
}
p = realloc(p, 0);
if (p != NULL)
merror("realloc (p, 0) failed.");
return errors != 0;
}
FINSH_FUNCTION_EXPORT(libc_mem, memory test for libc);