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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <config.h>
#include <isc/os.h>
#ifdef HAVE_SYSCONF
#include <unistd.h>
#ifndef __hpux
static inline long
sysconf_ncpus(void) {
#if defined(_SC_NPROCESSORS_ONLN)
return sysconf((_SC_NPROCESSORS_ONLN));
#elif defined(_SC_NPROC_ONLN)
return sysconf((_SC_NPROC_ONLN));
#else
return (0);
#endif
}
#endif
#endif /* HAVE_SYSCONF */
#ifdef __hpux
#include <sys/pstat.h>
static inline int
hpux_ncpus(void) {
struct pst_dynamic psd;
if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) != -1)
return (psd.psd_proc_cnt);
else
return (0);
}
#endif /* __hpux */
#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
#include <sys/types.h> /* for FreeBSD */
#include <sys/param.h> /* for NetBSD */
#include <sys/sysctl.h>
static int
sysctl_ncpus(void) {
int ncpu, result;
size_t len;
len = sizeof(ncpu);
result = sysctlbyname("hw.ncpu", &ncpu, &len , 0, 0);
if (result != -1)
return (ncpu);
return (0);
}
#endif
unsigned int
isc_os_ncpus(void) {
long ncpus = 0;
#ifdef __hpux
ncpus = hpux_ncpus();
#elif defined(HAVE_SYSCONF)
ncpus = sysconf_ncpus();
#endif
#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
if (ncpus <= 0)
ncpus = sysctl_ncpus();
#endif
if (ncpus <= 0)
ncpus = 1;
return ((unsigned int)ncpus);
}
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