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Annotation of embedaddon/ntp/lib/isc/unix/os.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
                      3:  * Copyright (C) 2000, 2001  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 1.18 2007/06/19 23:47:18 tbox Exp $ */
                     19: 
                     20: #include <config.h>
                     21: 
                     22: #include <isc/os.h>
                     23: 
                     24: 
                     25: #ifdef HAVE_SYSCONF
                     26: 
                     27: #include <unistd.h>
                     28: 
                     29: #ifndef __hpux
                     30: static inline long
                     31: sysconf_ncpus(void) {
                     32: #if defined(_SC_NPROCESSORS_ONLN)
                     33:        return sysconf((_SC_NPROCESSORS_ONLN));
                     34: #elif defined(_SC_NPROC_ONLN)
                     35:        return sysconf((_SC_NPROC_ONLN));
                     36: #else
                     37:        return (0);
                     38: #endif
                     39: }
                     40: #endif
                     41: #endif /* HAVE_SYSCONF */
                     42: 
                     43: 
                     44: #ifdef __hpux
                     45: 
                     46: #include <sys/pstat.h>
                     47: 
                     48: static inline int
                     49: hpux_ncpus(void) {
                     50:        struct pst_dynamic psd;
                     51:        if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) != -1)
                     52:                return (psd.psd_proc_cnt);
                     53:        else
                     54:                return (0);
                     55: }
                     56: 
                     57: #endif /* __hpux */
                     58: 
                     59: #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
                     60: #include <sys/types.h>  /* for FreeBSD */
                     61: #include <sys/param.h>  /* for NetBSD */
                     62: #include <sys/sysctl.h>
                     63: 
                     64: static int
                     65: sysctl_ncpus(void) {
                     66:        int ncpu, result;
                     67:        size_t len;
                     68: 
                     69:        len = sizeof(ncpu);
                     70:        result = sysctlbyname("hw.ncpu", &ncpu, &len , 0, 0);
                     71:        if (result != -1)
                     72:                return (ncpu);
                     73:        return (0);
                     74: }
                     75: #endif
                     76: 
                     77: unsigned int
                     78: isc_os_ncpus(void) {
                     79:        long ncpus = 0;
                     80: 
                     81: #ifdef __hpux
                     82:        ncpus = hpux_ncpus();
                     83: #elif defined(HAVE_SYSCONF)
                     84:        ncpus = sysconf_ncpus();
                     85: #endif
                     86: #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
                     87:        if (ncpus <= 0)
                     88:                ncpus = sysctl_ncpus();
                     89: #endif
                     90:        if (ncpus <= 0)
                     91:                ncpus = 1;
                     92: 
                     93:        return ((unsigned int)ncpus);
                     94: }