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