1 /* $OpenBSD: alloc.c,v 1.9 2010/01/01 19:10:24 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 47 void * 48 dmalloc(int size, char *name) 49 { 50 void *foo = calloc(size, sizeof(char)); 51 52 if (!foo) 53 warning("No memory for %s.", name); 54 return (foo); 55 } 56 57 void 58 dfree(void *ptr, char *name) 59 { 60 if (!ptr) { 61 warning("dfree %s: free on null pointer.", name); 62 return; 63 } 64 free(ptr); 65 } 66 67 struct tree_cache *free_tree_caches; 68 69 struct tree_cache * 70 new_tree_cache(char *name) 71 { 72 struct tree_cache *rval; 73 74 if (free_tree_caches) { 75 rval = free_tree_caches; 76 free_tree_caches = (struct tree_cache *)(rval->value); 77 } else { 78 rval = dmalloc(sizeof(struct tree_cache), name); 79 if (!rval) 80 error("unable to allocate tree cache for %s.", name); 81 } 82 return (rval); 83 } 84 85 void 86 free_hash_bucket(struct hash_bucket *ptr, char *name) 87 { 88 dfree(ptr, name); 89 } 90 91 void 92 free_tree_cache(struct tree_cache *ptr) 93 { 94 ptr->value = (unsigned char *)free_tree_caches; 95 free_tree_caches = ptr; 96 } 97 98 void 99 free_tree(struct tree *ptr, char *name) 100 { 101 dfree(ptr, name); 102 } 103 104 struct lease_state * 105 new_lease_state(char *name) 106 { 107 struct lease_state *rval; 108 109 if (free_lease_states) { 110 rval = free_lease_states; 111 free_lease_states = 112 (struct lease_state *)(free_lease_states->next); 113 } else 114 rval = dmalloc (sizeof (struct lease_state), name); 115 return (rval); 116 } 117 118 void 119 free_lease_state(struct lease_state *ptr, char *name) 120 { 121 if (ptr->prl) 122 dfree(ptr->prl, name); 123 ptr->next = free_lease_states; 124 free_lease_states = ptr; 125 } 126 127 void 128 free_lease(struct lease *ptr, char *name) 129 { 130 dfree(ptr, name); 131 } 132