95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
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* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2000, 2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: os.c,v 1.18 2007/06/19 23:47:18 tbox Exp $ */
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#include <config.h>
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#include <isc/os.h>
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#ifdef HAVE_SYSCONF
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#include <unistd.h>
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#ifndef __hpux
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static inline long
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sysconf_ncpus(void) {
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#if defined(_SC_NPROCESSORS_ONLN)
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return sysconf((_SC_NPROCESSORS_ONLN));
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#elif defined(_SC_NPROC_ONLN)
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return sysconf((_SC_NPROC_ONLN));
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#else
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return (0);
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#endif
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}
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#endif
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#endif /* HAVE_SYSCONF */
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#ifdef __hpux
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#include <sys/pstat.h>
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static inline int
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hpux_ncpus(void) {
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struct pst_dynamic psd;
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if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) != -1)
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return (psd.psd_proc_cnt);
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else
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return (0);
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}
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#endif /* __hpux */
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#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
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#include <sys/types.h> /* for FreeBSD */
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#include <sys/param.h> /* for NetBSD */
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#include <sys/sysctl.h>
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static int
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sysctl_ncpus(void) {
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int ncpu, result;
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size_t len;
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len = sizeof(ncpu);
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result = sysctlbyname("hw.ncpu", &ncpu, &len , 0, 0);
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if (result != -1)
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return (ncpu);
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return (0);
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}
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#endif
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unsigned int
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isc_os_ncpus(void) {
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long ncpus = 0;
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#ifdef __hpux
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ncpus = hpux_ncpus();
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#elif defined(HAVE_SYSCONF)
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ncpus = sysconf_ncpus();
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#endif
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#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
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if (ncpus <= 0)
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ncpus = sysctl_ncpus();
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#endif
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if (ncpus <= 0)
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ncpus = 1;
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return ((unsigned int)ncpus);
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}
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