rt-thread/examples/kernel/heap_realloc.c

#include <rtthread.h>
#include "tc_comm.h"

/*
 * This is an example for heap malloc
 */

static rt_bool_t mem_check(rt_uint8_t *ptr, rt_uint8_t value, rt_uint32_t len)
{
	while (len)
	{
		if (*ptr != value) return RT_FALSE;

		ptr ++;
		len --;
	}

	return RT_TRUE;
}

static void heap_realloc_init()
{
	rt_uint8_t res = TC_STAT_PASSED;
	rt_uint8_t *ptr1, *ptr2, *ptr3, *ptr4, *ptr5;

	ptr1 = rt_malloc(1);
	ptr2 = rt_malloc(13);
	ptr3 = rt_malloc(31);
	ptr4 = rt_malloc(127);
	ptr5 = rt_malloc(0);

	memset(ptr1, 1, 1);
	memset(ptr2, 2, 13);
	memset(ptr3, 3, 31);
	memset(ptr4, 4, 127);

	if (mem_check(ptr1, 1, 1)   != RT_FALSE) goto _failed;
	if (mem_check(ptr2, 2, 13)  != RT_FALSE) goto _failed;
	if (mem_check(ptr3, 3, 31)  != RT_FALSE) goto _failed;
	if (mem_check(ptr4, 4, 127) != RT_FALSE) goto _failed;

	ptr1 = rt_realloc(ptr1, 13);
	ptr2 = rt_realloc(ptr2, 31);
	ptr3 = rt_realloc(ptr3, 127);
	ptr4 = rt_realloc(ptr4, 1);
	ptr5 = rt_realloc(ptr5, 0);
	if (ptr5)
	{
		rt_kprintf("realloc(ptr, 0) should return NULL\n");
		res = TC_STAT_FAILED;
	}

	if (mem_check(ptr1, 1, 1)   != RT_FALSE) goto _failed;
	if (mem_check(ptr2, 2, 13)  != RT_FALSE) goto _failed;
	if (mem_check(ptr3, 3, 31)  != RT_FALSE) goto _failed;
	if (mem_check(ptr4, 4, 1)	!= RT_FALSE) goto _failed;

	rt_free(ptr4);
	rt_free(ptr3);
	rt_free(ptr3);
	rt_free(ptr1);

	tc_done(res);
}

#ifdef RT_USING_TC
int _tc_heap_realloc()
{
	heap_realloc_init();

	return 0;
}
FINSH_FUNCTION_EXPORT(_tc_heap_realloc, a heap re-malloc test);
#else
int rt_application_init()
{
	heap_realloc_init();

	return 0;
}
#endif