1 /* $OpenBSD: alloc.c,v 1.12 2010/01/02 04:21:16 krw Exp $ */ 2 3 /* Memory allocation... */ 4 5 /* 6 * Copyright (c) 1995, 1996, 1998 The Internet Software Consortium. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of The Internet Software Consortium nor the names 19 * of its contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND 23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR 27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * This software has been written for the Internet Software Consortium 37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie 38 * Enterprises. To learn more about the Internet Software Consortium, 39 * see ``http://www.vix.com/isc''. To learn more about Vixie 40 * Enterprises, see ``http://www.vix.com''. 41 */ 42 43 #include "dhcpd.h" 44 45 struct lease_state *free_lease_states; 46 struct tree_cache *free_tree_caches; 47 48 struct tree_cache * 49 new_tree_cache(char *name) 50 { 51 struct tree_cache *rval; 52 53 if (free_tree_caches) { 54 rval = free_tree_caches; 55 free_tree_caches = (struct tree_cache *)(rval->value); 56 } else { 57 rval = calloc(1, sizeof(struct tree_cache)); 58 if (!rval) 59 error("unable to allocate tree cache for %s.", name); 60 } 61 return (rval); 62 } 63 64 void 65 free_tree_cache(struct tree_cache *ptr) 66 { 67 ptr->value = (unsigned char *)free_tree_caches; 68 free_tree_caches = ptr; 69 } 70 71 struct lease_state * 72 new_lease_state(char *name) 73 { 74 struct lease_state *rval; 75 76 if (free_lease_states) { 77 rval = free_lease_states; 78 free_lease_states = free_lease_states->next; 79 } else { 80 rval = calloc(1, sizeof(struct lease_state)); 81 if (!rval) 82 error("unable to allocate lease state for %s.", name); 83 } 84 85 return (rval); 86 } 87 88 void 89 free_lease_state(struct lease_state *ptr, char *name) 90 { 91 if (ptr->prl) 92 free(ptr->prl); 93 ptr->next = free_lease_states; 94 free_lease_states = ptr; 95 } 96