/* $OpenBSD: alloc.c,v 1.12 2010/01/02 04:21:16 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 "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) { if (ptr->prl) free(ptr->prl); ptr->next = free_lease_states; free_lease_states = ptr; }