138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* Implementation of the CPU_TIME intrinsic.
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Copyright (C) 2003, 2007, 2009 Free Software Foundation, Inc.
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include "time_1.h"
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/* The most accurate way to get the CPU time is getrusage ().
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If we have times(), that's good enough, too. */
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#if !defined (HAVE_GETRUSAGE) || !defined (HAVE_SYS_RESOURCE_H)
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/* For times(), we _must_ know the number of clock ticks per second. */
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# if defined (HAVE_TIMES) && (defined (HZ) || defined (_SC_CLK_TCK) || defined (CLK_TCK))
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# ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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# endif
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# if defined (HAVE_SYS_TIMES_H)
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# include <sys/times.h>
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# endif
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# ifndef HZ
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# if defined _SC_CLK_TCK
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# define HZ sysconf(_SC_CLK_TCK)
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# else
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# define HZ CLK_TCK
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# endif
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# endif
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# endif /* HAVE_TIMES etc. */
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#endif /* !HAVE_GETRUSAGE || !HAVE_SYS_RESOURCE_H */
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static inline void __cpu_time_1 (long *, long *) ATTRIBUTE_ALWAYS_INLINE;
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static inline void
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__cpu_time_1 (long *sec, long *usec)
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{
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#if defined(__MINGW32__) || defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
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long user_sec, user_usec, system_sec, system_usec;
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__time_1 (&user_sec, &user_usec, &system_sec, &system_usec);
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*sec = user_sec + system_sec;
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*usec = user_usec + system_usec;
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#else /* ! HAVE_GETRUSAGE || ! HAVE_SYS_RESOURCE_H */
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#ifdef HAVE_TIMES
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struct tms buf;
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times (&buf);
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*sec = 0;
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*usec = (buf.tms_utime + buf.tms_stime) * (1000000 / HZ);
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#else /* ! HAVE_TIMES */
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/* We have nothing to go on. Return -1. */
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*sec = -1;
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*usec = 0;
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#endif /* HAVE_TIMES */
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#endif /* __MINGW32__ || HAVE_GETRUSAGE */
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}
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extern void cpu_time_4 (GFC_REAL_4 *);
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iexport_proto(cpu_time_4);
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void cpu_time_4 (GFC_REAL_4 *time)
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{
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long sec, usec;
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__cpu_time_1 (&sec, &usec);
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*time = sec + usec * (GFC_REAL_4)1.e-6;
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}
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iexport(cpu_time_4);
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extern void cpu_time_8 (GFC_REAL_8 *);
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export_proto(cpu_time_8);
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void cpu_time_8 (GFC_REAL_8 *time)
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{
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long sec, usec;
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__cpu_time_1 (&sec, &usec);
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*time = sec + usec * (GFC_REAL_8)1.e-6;
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}
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#ifdef HAVE_GFC_REAL_10
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extern void cpu_time_10 (GFC_REAL_10 *);
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export_proto(cpu_time_10);
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void cpu_time_10 (GFC_REAL_10 *time)
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{
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long sec, usec;
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__cpu_time_1 (&sec, &usec);
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*time = sec + usec * (GFC_REAL_10)1.e-6;
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}
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#endif
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#ifdef HAVE_GFC_REAL_16
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extern void cpu_time_16 (GFC_REAL_16 *);
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export_proto(cpu_time_16);
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void cpu_time_16 (GFC_REAL_16 *time)
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{
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long sec, usec;
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__cpu_time_1 (&sec, &usec);
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*time = sec + usec * (GFC_REAL_16)1.e-6;
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}
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#endif
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extern void second_sub (GFC_REAL_4 *);
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export_proto(second_sub);
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void
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second_sub (GFC_REAL_4 *s)
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{
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cpu_time_4 (s);
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}
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extern GFC_REAL_4 second (void);
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export_proto(second);
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GFC_REAL_4
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second (void)
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{
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GFC_REAL_4 s;
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cpu_time_4 (&s);
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return s;
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}
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