Function sbuf_delete

freebsd/kern/subr_sbuf.c:870–884

* Clear an sbuf, free its buffer if necessary. */

 * Clear an sbuf, free its buffer if necessary.
 */
void
sbuf_delete(struct sbuf *s)
{
	int isdyn;

	assert_sbuf_integrity(s);
	/* don't care if it's finished or not */

	if (SBUF_ISDYNAMIC(s))
		SBFREE(s->s_buf);
	isdyn = SBUF_ISDYNSTRUCT(s);
	memset(s, 0, sizeof(*s));
	if (isdyn)
		SBFREE(s);
}

/*
 * Check if an sbuf has been finished.