| /* Copyright (C) 1995, 1996 Free Software Foundation, Inc. |
| This file is part of GNU Fortran libU77 library. |
| |
| This library is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Library General Public License as published |
| by the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| GNU Fortran 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with GNU Fortran; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #if HAVE_UNISTD_H |
| # include <unistd.h> |
| #endif |
| #include <sys/types.h> |
| #include <sys/times.h> |
| #include <sys/param.h> |
| #if HAVE_GETRUSAGE |
| # include <sys/time.h> |
| # include <sys/resource.h> |
| #endif |
| #include "f2c.h" |
| |
| /* For dtime, etime we store the clock tick parameter (clk_tck) the |
| first time either of them is invoked rather than each time. This |
| approach probably speeds up each invocation by avoiding a system |
| call each time, but means that the overhead of the first call is |
| different to all others. */ |
| static long clk_tck = 0; |
| |
| #ifdef KR_headers |
| doublereal G77_etime_0 (tarray) |
| real tarray[2]; |
| #else |
| doublereal G77_etime_0 (real tarray[2]) |
| #endif |
| { |
| /* The getrusage version is only the default for convenience. */ |
| #ifdef HAVE_GETRUSAGE |
| struct rusage rbuff; |
| |
| if (getrusage (RUSAGE_SELF, &rbuff) != 0) |
| abort (); |
| tarray[0] = ((float) (rbuff.ru_utime).tv_sec + |
| (float) (rbuff.ru_utime).tv_usec/1000000.0); |
| tarray[1] = ((float) (rbuff.ru_stime).tv_sec + |
| (float) (rbuff.ru_stime).tv_usec/1000000.0); |
| #else /* HAVE_GETRUSAGE */ |
| struct tms buffer; |
| |
| /* NeXTStep seems to define _SC_CLK_TCK but not to have sysconf; |
| fixme: does using _POSIX_VERSION help? */ |
| # if defined _SC_CLK_TCK && defined _POSIX_VERSION |
| if (! clk_tck) clk_tck = sysconf(_SC_CLK_TCK); |
| # elif defined CLOCKS_PER_SECOND |
| if (! clk_tck) clk_tck = CLOCKS_PER_SECOND; |
| # elif defined CLK_TCK |
| if (! clk_tck) clk_tck = CLK_TCK; |
| # elif defined HAVE_GETRUSAGE |
| # else |
| #error Dont know clock tick length |
| # endif |
| if (times(&buffer) < 0) return -1.0; |
| tarray[0] = (float) buffer.tms_utime / (float)clk_tck; |
| tarray[1] = (float) buffer.tms_stime / (float)clk_tck; |
| #endif /* HAVE_GETRUSAGE */ |
| return (tarray[0]+tarray[1]); |
| } |