2 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or 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 1.18 2007/06/19 23:47:17 tbox 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
);