Date: Fri, 9 May 2008 11:17:27 -0700 From: "Steve Franks" <stevefranks@ieee.org> To: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: CLOCK_REALTIME undefined on my system Message-ID: <539c60b90805091117l57ed9966h99d6ae5f45925cdf@mail.gmail.com>
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The manpage (http://www.freebsd.org/cgi/man.cgi?query=clock_gettime&sektion=2&apropos=0&manpath=FreeBSD+7.0-RELEASE) for clock_gettime() specifies the correct header as <time.h>, which I am using, and I don't see any errors on clock_gettime(), but the param I need, listed in the manpage, CLOCK_REALTIME is undefined. Any ideas how this could be? I've recently cvsup'd standard-supfile, so you'd think I'm up to date... I'm also getting an implicit declaration of isnormal(), and math.h is clearly included... Steve /* * fclock.c * * Copyright (C) 2005 Hein Roehrig * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. * */ #define _ISOC99_SOURCE #define _POSIX_C_SOURCE 199309L #include <unistd.h> #include <stdlib.h> #include <stdio.h> #include <time.h> #ifndef __MINGW32__ #include <sys/times.h> #endif #include <math.h> #include <assert.h> /* ------------------------------------------------------------------ */ #ifdef __APPLE__ #include <mach/mach_time.h> #include <sys/types.h> #include <sys/time.h> long double frealtime() { long double result; static uint64_t start_mat; static long double start_time; static double multiplier; mach_timebase_info_data_t mtid; struct timeval tv; if(!mtid.denom == 0) { mach_timebase_info(&mtid); multiplier = (double)mtid.numer / (double)mtid.denom; gettimeofday(&tv, NULL); start_time = (long double)tv.tv_sec + (long double)tv.tv_usec * 1000.0; start_mat = mach_absolute_time(); } result = start_time + (mach_absolute_time() - start_mat) * multiplier; assert(isnormal(result)); assert(result > 0); return result; } #else /* def __APPLE__ */ /* ------------------------------------------------------------------ */ #ifdef _POSIX_TIMERS long double frealtime() { long double result; struct timespec t; if (clock_gettime(CLOCK_REALTIME, &t)==-1) { perror("frealtime (clock_gettime)"); exit(EXIT_FAILURE); } result = (long double)t.tv_sec + (long double)t.tv_nsec*(long double)1e-9; assert(isnormal(result)); assert(result > 0); return result; } #else /* def _POSIX_TIMERS */ /* ------------------------------------------------------------------ */ #ifdef __MINGW32__ #include <sys/timeb.h> long double frealtime() { long double result; struct timeb t; ftime(&t); result = (long double)t.time + (long double)t.millitm * (long double)1e-3; assert(isnormal(result)); assert(result > 0); return result; } #else /* def __MINGW32__ */ /* ------------------------------------------------------------------ */ #ifndef CLK_TCK static clock_t CLK_TCK = 0; static void set_clk_tck(void) __attribute__ ((constructor)); static void set_clk_tck(void) { long v = sysconf(_SC_CLK_TCK); if (v == -1) { perror("sysconf(_SC_CLK_TCK)"); exit(EXIT_FAILURE); } CLK_TCK = v; } #endif long double frealtime() { long double result; struct tms t; clock_t c=times(&t); if (c==(clock_t)-1) { perror("frealtime (times)"); exit(EXIT_FAILURE); } result = (long double)c/CLK_TCK; assert(isnormal(result)); assert(result > 0); return result; } #endif #endif #endif
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