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/* $OpenBSD: alloc.c,v 1.14 2016/02/06 23:50:10 krw Exp $ */
/* Memory allocation... */
/*
* Copyright (c) 1995, 1996, 1998 The Internet Software Consortium.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of The Internet Software Consortium nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This software has been written for the Internet Software Consortium
* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
* Enterprises. To learn more about the Internet Software Consortium,
* see ``http://www.vix.com/isc''. To learn more about Vixie
* Enterprises, see ``http://www.vix.com''.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include "dhcp.h"
#include "tree.h"
#include "dhcpd.h"
struct lease_state *free_lease_states;
struct tree_cache *free_tree_caches;
struct tree_cache *
new_tree_cache(char *name)
{
struct tree_cache *rval;
if (free_tree_caches) {
rval = free_tree_caches;
free_tree_caches = (struct tree_cache *)(rval->value);
} else {
rval = calloc(1, sizeof(struct tree_cache));
if (!rval)
error("unable to allocate tree cache for %s.", name);
}
return (rval);
}
void
free_tree_cache(struct tree_cache *ptr)
{
ptr->value = (unsigned char *)free_tree_caches;
free_tree_caches = ptr;
}
struct lease_state *
new_lease_state(char *name)
{
struct lease_state *rval;
if (free_lease_states) {
rval = free_lease_states;
free_lease_states = free_lease_states->next;
} else {
rval = calloc(1, sizeof(struct lease_state));
if (!rval)
error("unable to allocate lease state for %s.", name);
}
return (rval);
}
void
free_lease_state(struct lease_state *ptr, char *name)
{
free(ptr->prl);
ptr->next = free_lease_states;
free_lease_states = ptr;
}
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