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michael |
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/* PEAK Library |
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* |
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* Copyright (c) 2003 |
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* Stephane Thiell <mbuna@bugged.org>. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#define RCSID "$Id: utilities.c,v 1.1.1.1 2003/12/30 02:29:39 mbuna Exp $" |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "utilities.h" |
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#include <assert.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/param.h> |
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#include <sys/resource.h> |
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#ifdef HAVE_SYS_MPCTL_H |
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#include <sys/mpctl.h> |
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#endif |
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#ifdef HAVE_SYS_SYSCTL_H |
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#include <sys/sysctl.h> |
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#endif |
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#include "internal.h" |
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/* peak_get_ncpus */ |
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#if defined(HAVE_SYSCTL) && defined(CTL_HW) && defined(HW_NCPU) |
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/* BSD sysctl */ |
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int |
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peak_get_ncpus() |
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{ |
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int mib[2], ncpus; |
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size_t len; |
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mib[0] = CTL_HW; |
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mib[1] = HW_NCPU; |
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len = sizeof(ncpus); |
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if (sysctl(mib, 2, &ncpus, &len, NULL, 0) == -1) |
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PEAK_HALT; |
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return ncpus; |
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} |
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#elif defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN) |
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/* POSIX.1 sysconf */ |
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int |
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peak_get_ncpus() |
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{ |
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return sysconf(_SC_NPROCESSORS_ONLN); |
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} |
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#elif defined(HAVE_MPCTL) |
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/* HP-UX mpctl */ |
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int |
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peak_get_ncpus() |
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{ |
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return mpctl(MPC_GETNUMSPUS, NULL, NULL); |
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} |
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#endif |
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/* peak_set_fdlimit */ |
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#undef RLIMIT_FD_MAX |
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#if defined(RLIMIT_NOFILE) |
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# define RLIMIT_FD_MAX RLIMIT_NOFILE |
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#elif defined(RLIMIT_FDMAX) |
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# define RLIMIT_FD_MAX RLIMIT_FDMAX |
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#elif defined(RLIMIT_OFILE) |
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# define RLIMIT_FD_MAX RLIMIT_OFILE |
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#elif defined(RLIMIT_OPEN_MAX) |
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# define RLIMIT_FD_MAX RLIMIT_OPEN_MAX |
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#endif |
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#if defined(HAVE_SETRLIMIT) && defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) |
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#define PEAK_CAN_SETRLIMIT |
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#else |
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#warning PEAK cannot set resource limit (setrlimit) |
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#endif |
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int |
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peak_set_fdlimit(int maxfiles) |
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{ |
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#ifdef PEAK_CAN_SETRLIMIT |
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struct rlimit limit; |
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if (!getrlimit(RLIMIT_FD_MAX, &limit)) |
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{ |
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if (limit.rlim_max < maxfiles) |
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return limit.rlim_max; |
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limit.rlim_cur = limit.rlim_max; /* make soft limit the max */ |
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setrlimit(RLIMIT_FD_MAX, &limit); |
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} |
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#endif |
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return maxfiles; |
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} |
