resource.c revision 290001 
1/*
2 * Copyright (C) 2004, 2007, 2008  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001  Internet Software Consortium.
4 *
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.
8 *
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.
16 */
17
18/* $Id: resource.c,v 1.10 2008/07/11 23:47:09 tbox Exp $ */
19
20#include <config.h>
21
22#include <stdio.h>
23
24#include <isc/platform.h>
25#include <isc/resource.h>
26#include <isc/result.h>
27#include <isc/util.h>
28
29#include "errno2result.h"
30
31/*
32 * Windows limits the maximum number of open files to 2048
33 */
34
35#define WIN32_MAX_OPEN_FILES	2048
36
37isc_result_t
38isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value) {
39	isc_resourcevalue_t rlim_value;
40	int wresult;
41
42	if (resource != isc_resource_openfiles)
43		return (ISC_R_NOTIMPLEMENTED);
44
45
46	if (value == ISC_RESOURCE_UNLIMITED)
47		rlim_value = WIN32_MAX_OPEN_FILES;
48	else
49		rlim_value = min(value, WIN32_MAX_OPEN_FILES);
50
51	wresult = _setmaxstdio((int) rlim_value);
52
53	if (wresult > 0)
54		return (ISC_R_SUCCESS);
55	else
56		return (isc__errno2result(errno));
57}
58
59isc_result_t
60isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
61
62	if (resource != isc_resource_openfiles)
63		return (ISC_R_NOTIMPLEMENTED);
64
65	*value = WIN32_MAX_OPEN_FILES;
66	return (ISC_R_SUCCESS);
67}
68
69isc_result_t
70isc_resource_getcurlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
71	return (isc_resource_getlimit(resource, value));
72}
73