os.c revision 290001 
1/*
2 * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000-2002  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: os.c,v 1.8 2007/06/19 23:47:19 tbox Exp $ */
19
20#include <windows.h>
21
22#include <isc/os.h>
23
24static BOOL bInit = FALSE;
25static SYSTEM_INFO SystemInfo;
26
27static void
28initialize_action(void) {
29	if (bInit)
30		return;
31
32	GetSystemInfo(&SystemInfo);
33	bInit = TRUE;
34}
35
36unsigned int
37isc_os_ncpus(void) {
38	long ncpus = 1;
39	initialize_action();
40	ncpus = SystemInfo.dwNumberOfProcessors;
41	if (ncpus <= 0)
42		ncpus = 1;
43
44	return ((unsigned int)ncpus);
45}
46