external/bsd/bind/dist/lib/isc/win32/resource.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2007, 2008  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2000, 2001  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: resource.c,v 1.10 2008/07/11 23:47:09 tbox Exp */
  21
  22 #include <config.h>
  23
  24 #include <stdio.h>
  25
  26 #include <isc/platform.h>
  27 #include <isc/resource.h>
  28 #include <isc/result.h>
  29 #include <isc/util.h>
  30
  31 #include "errno2result.h"
  32
  33 /*
  34  * Windows limits the maximum number of open files to 2048
  35  */
  36
  37 #define WIN32_MAX_OPEN_FILES    2048
  38
  39 isc_result_t
  40 isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value) {
  41         isc_resourcevalue_t rlim_value;
  42         int wresult;
  43
  44         if (resource != isc_resource_openfiles)
  45                 return (ISC_R_NOTIMPLEMENTED);
  46
  47
  48         if (value == ISC_RESOURCE_UNLIMITED)
  49                 rlim_value = WIN32_MAX_OPEN_FILES;
  50         else
  51                 rlim_value = min(value, WIN32_MAX_OPEN_FILES);
  52
  53         wresult = _setmaxstdio((int) rlim_value);
  54
  55         if (wresult > 0)
  56                 return (ISC_R_SUCCESS);
  57         else
  58                 return (isc__errno2result(errno));
  59 }
  60
  61 isc_result_t
  62 isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
  63
  64         if (resource != isc_resource_openfiles)
  65                 return (ISC_R_NOTIMPLEMENTED);
  66
  67         *value = WIN32_MAX_OPEN_FILES;
  68         return (ISC_R_SUCCESS);
  69 }
  70
  71 isc_result_t
  72 isc_resource_getcurlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
  73         return (isc_resource_getlimit(resource, value));
  74 }