/contrib/bind9/lib/isc/unix/os.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 94 lines · 59 code · 18 blank · 17 comment · 8 complexity · 6c272d1af00b5894927c6d97b3b2c404 MD5 · raw file
- /*
- * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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: os.c,v 1.18 2007/06/19 23:47:18 tbox Exp $ */
- #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);
- }