clock.c revision 60484
1/* ANSI-compatible clock function. 2 Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc. 3 4This file is part of the libiberty library. This library is free 5software; you can redistribute it and/or modify it under the 6terms of the GNU General Public License as published by the 7Free Software Foundation; either version 2, or (at your option) 8any later version. 9 10This library is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along with GNU CC; see the file COPYING. If not, write to 17the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19As a special exception, if you link this library with files 20compiled with a GNU compiler to produce an executable, this does not cause 21the resulting executable to be covered by the GNU General Public License. 22This exception does not however invalidate any other reasons why 23the executable file might be covered by the GNU General Public License. */ 24 25#include "config.h" 26 27#ifdef HAVE_GETRUSAGE 28#include <sys/time.h> 29#include <sys/resource.h> 30#endif 31 32#ifdef HAVE_TIMES 33#ifdef HAVE_SYS_PARAM_H 34#include <sys/param.h> 35#endif 36#include <sys/times.h> 37#endif 38 39#ifdef HAVE_UNISTD_H 40#include <unistd.h> 41#endif 42 43#ifdef _SC_CLK_TCK 44#define GNU_HZ sysconf(_SC_CLK_TCK) 45#else 46#ifdef HZ 47#define GNU_HZ HZ 48#else 49#ifdef CLOCKS_PER_SEC 50#define GNU_HZ CLOCKS_PER_SEC 51#endif 52#endif 53#endif 54 55/* FIXME: should be able to declare as clock_t. */ 56 57long 58clock () 59{ 60#ifdef HAVE_GETRUSAGE 61 struct rusage rusage; 62 63 getrusage (0, &rusage); 64 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec 65 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec); 66#else 67#ifdef HAVE_TIMES 68 struct tms tms; 69 70 times (&tms); 71 return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); 72#else 73#ifdef VMS 74 struct 75 { 76 int proc_user_time; 77 int proc_system_time; 78 int child_user_time; 79 int child_system_time; 80 } vms_times; 81 82 times (&vms_times); 83 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000; 84#else 85 /* A fallback, if nothing else available. */ 86 return 0; 87#endif /* VMS */ 88#endif /* HAVE_TIMES */ 89#endif /* HAVE_GETRUSAGE */ 90} 91 92