bind/lib/isc/win32/resource.c

/*
 * Copyright (C) 2000, 2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: resource.c,v 1.4 2001/10/26 02:29:43 mayer Exp $ */

#include <config.h>

#include <stdio.h>

#include <isc/platform.h>
#include <isc/resource.h>
#include <isc/result.h>
#include <isc/util.h>

#include "errno2result.h"

/*
 * Windows limits the maximum number of open files to 2048
 */

#define RLIMIT_NOFILE	2048

isc_result_t
isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value) {
	isc_resourcevalue_t rlim_value;
	int wresult;

	if (resource != isc_resource_openfiles)
		return (ISC_R_NOTIMPLEMENTED);


	if (value == ISC_RESOURCE_UNLIMITED)
		rlim_value = RLIMIT_NOFILE;
	else
		rlim_value = min(value, RLIMIT_NOFILE);

	wresult = _setmaxstdio((int) rlim_value);

	if (wresult > 0)
		return (ISC_R_SUCCESS);
	else
		return (isc__errno2result(errno));
}

isc_result_t
isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value) {

	if (resource != isc_resource_openfiles)
		return (ISC_R_NOTIMPLEMENTED);

	*value = RLIMIT_NOFILE;
	return (ISC_R_SUCCESS);
}