2 * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001 Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: quota.c,v 1.13.18.3 2005/07/27 02:44:21 marka Exp $ */
26 #include <isc/quota.h>
30 isc_quota_init(isc_quota_t *quota, int max) {
34 return (isc_mutex_init("a->lock));
38 isc_quota_destroy(isc_quota_t *quota) {
39 INSIST(quota->used == 0);
43 DESTROYLOCK("a->lock);
47 isc_quota_soft(isc_quota_t *quota, int soft) {
54 isc_quota_max(isc_quota_t *quota, int max) {
61 isc_quota_reserve(isc_quota_t *quota) {
64 if (quota->max == 0 || quota->used < quota->max) {
65 if (quota->soft == 0 || quota->used < quota->soft)
66 result = ISC_R_SUCCESS;
68 result = ISC_R_SOFTQUOTA;
77 isc_quota_release(isc_quota_t *quota) {
79 INSIST(quota->used > 0);
85 isc_quota_attach(isc_quota_t *quota, isc_quota_t **p)
88 INSIST(p != NULL && *p == NULL);
89 result = isc_quota_reserve(quota);
90 if (result == ISC_R_SUCCESS || result == ISC_R_SOFTQUOTA)
96 isc_quota_detach(isc_quota_t **p)
98 INSIST(p != NULL && *p != NULL);
99 isc_quota_release(*p);