| /* Implementation of the CPU_TIME intrinsic. |
| Copyright (C) 2003, 2007, 2009 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Fortran 95 runtime library (libgfortran). |
| |
| Libgfortran 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 3 of the License, or (at your option) any later version. |
| |
| Libgfortran 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "libgfortran.h" |
| #include "time_1.h" |
| |
| /* The most accurate way to get the CPU time is getrusage (). |
| If we have times(), that's good enough, too. */ |
| #if !defined (HAVE_GETRUSAGE) || !defined (HAVE_SYS_RESOURCE_H) |
| /* For times(), we _must_ know the number of clock ticks per second. */ |
| # if defined (HAVE_TIMES) && (defined (HZ) || defined (_SC_CLK_TCK) || defined (CLK_TCK)) |
| # ifdef HAVE_SYS_PARAM_H |
| # include <sys/param.h> |
| # endif |
| # if defined (HAVE_SYS_TIMES_H) |
| # include <sys/times.h> |
| # endif |
| # ifndef HZ |
| # if defined _SC_CLK_TCK |
| # define HZ sysconf(_SC_CLK_TCK) |
| # else |
| # define HZ CLK_TCK |
| # endif |
| # endif |
| # endif /* HAVE_TIMES etc. */ |
| #endif /* !HAVE_GETRUSAGE || !HAVE_SYS_RESOURCE_H */ |
| |
| static inline void __cpu_time_1 (long *, long *) ATTRIBUTE_ALWAYS_INLINE; |
| |
| static inline void |
| __cpu_time_1 (long *sec, long *usec) |
| { |
| #if defined(__MINGW32__) || defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) |
| long user_sec, user_usec, system_sec, system_usec; |
| __time_1 (&user_sec, &user_usec, &system_sec, &system_usec); |
| *sec = user_sec + system_sec; |
| *usec = user_usec + system_usec; |
| #else /* ! HAVE_GETRUSAGE || ! HAVE_SYS_RESOURCE_H */ |
| #ifdef HAVE_TIMES |
| struct tms buf; |
| times (&buf); |
| *sec = 0; |
| *usec = (buf.tms_utime + buf.tms_stime) * (1000000 / HZ); |
| #else /* ! HAVE_TIMES */ |
| /* We have nothing to go on. Return -1. */ |
| *sec = -1; |
| *usec = 0; |
| #endif /* HAVE_TIMES */ |
| #endif /* __MINGW32__ || HAVE_GETRUSAGE */ |
| } |
| |
| |
| extern void cpu_time_4 (GFC_REAL_4 *); |
| iexport_proto(cpu_time_4); |
| |
| void cpu_time_4 (GFC_REAL_4 *time) |
| { |
| long sec, usec; |
| __cpu_time_1 (&sec, &usec); |
| *time = sec + usec * (GFC_REAL_4)1.e-6; |
| } |
| iexport(cpu_time_4); |
| |
| extern void cpu_time_8 (GFC_REAL_8 *); |
| export_proto(cpu_time_8); |
| |
| void cpu_time_8 (GFC_REAL_8 *time) |
| { |
| long sec, usec; |
| __cpu_time_1 (&sec, &usec); |
| *time = sec + usec * (GFC_REAL_8)1.e-6; |
| } |
| |
| #ifdef HAVE_GFC_REAL_10 |
| extern void cpu_time_10 (GFC_REAL_10 *); |
| export_proto(cpu_time_10); |
| |
| void cpu_time_10 (GFC_REAL_10 *time) |
| { |
| long sec, usec; |
| __cpu_time_1 (&sec, &usec); |
| *time = sec + usec * (GFC_REAL_10)1.e-6; |
| } |
| #endif |
| |
| #ifdef HAVE_GFC_REAL_16 |
| extern void cpu_time_16 (GFC_REAL_16 *); |
| export_proto(cpu_time_16); |
| |
| void cpu_time_16 (GFC_REAL_16 *time) |
| { |
| long sec, usec; |
| __cpu_time_1 (&sec, &usec); |
| *time = sec + usec * (GFC_REAL_16)1.e-6; |
| } |
| #endif |
| |
| extern void second_sub (GFC_REAL_4 *); |
| export_proto(second_sub); |
| |
| void |
| second_sub (GFC_REAL_4 *s) |
| { |
| cpu_time_4 (s); |
| } |
| |
| extern GFC_REAL_4 second (void); |
| export_proto(second); |
| |
| GFC_REAL_4 |
| second (void) |
| { |
| GFC_REAL_4 s; |
| cpu_time_4 (&s); |
| return s; |
| } |