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      1 /* Implementation of the CPU_TIME intrinsic.
      2    Copyright (C) 2003-2022 Free Software Foundation, Inc.
      3 
      4 This file is part of the GNU Fortran runtime library (libgfortran).
      5 
      6 Libgfortran is free software; you can redistribute it and/or
      7 modify it under the terms of the GNU General Public
      8 License as published by the Free Software Foundation; either
      9 version 3 of the License, or (at your option) any later version.
     10 
     11 Libgfortran is distributed in the hope that it will be useful,
     12 but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 GNU General Public License for more details.
     15 
     16 Under Section 7 of GPL version 3, you are granted additional
     17 permissions described in the GCC Runtime Library Exception, version
     18 3.1, as published by the Free Software Foundation.
     19 
     20 You should have received a copy of the GNU General Public License and
     21 a copy of the GCC Runtime Library Exception along with this program;
     22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     23 <http://www.gnu.org/licenses/>.  */
     24 
     25 #include "libgfortran.h"
     26 #include "time_1.h"
     27 
     28 
     29 static void
     30 __cpu_time_1 (long *sec, long *usec)
     31 {
     32   long user_sec, user_usec, system_sec, system_usec;
     33   if (gf_cputime (&user_sec, &user_usec, &system_sec, &system_usec) == 0)
     34     {
     35       *sec = user_sec + system_sec;
     36       *usec = user_usec + system_usec;
     37     }
     38   else
     39     {
     40       *sec = -1;
     41       *usec = 0;
     42     }
     43 }
     44 
     45 
     46 extern void cpu_time_4 (GFC_REAL_4 *);
     47 iexport_proto(cpu_time_4);
     48 
     49 void cpu_time_4 (GFC_REAL_4 *time)
     50 {
     51   long sec, usec;
     52   __cpu_time_1 (&sec, &usec);
     53   *time = sec + usec * GFC_REAL_4_LITERAL(1.e-6);
     54 }
     55 iexport(cpu_time_4);
     56 
     57 extern void cpu_time_8 (GFC_REAL_8 *);
     58 export_proto(cpu_time_8);
     59 
     60 void cpu_time_8 (GFC_REAL_8 *time)
     61 {
     62   long sec, usec;
     63   __cpu_time_1 (&sec, &usec);
     64   *time = sec + usec * GFC_REAL_8_LITERAL(1.e-6);
     65 }
     66 
     67 #ifdef HAVE_GFC_REAL_10
     68 extern void cpu_time_10 (GFC_REAL_10 *);
     69 export_proto(cpu_time_10);
     70 
     71 void cpu_time_10 (GFC_REAL_10 *time)
     72 {
     73   long sec, usec;
     74   __cpu_time_1 (&sec, &usec);
     75   *time = sec + usec * GFC_REAL_10_LITERAL(1.e-6);
     76 }
     77 #endif
     78 
     79 #ifdef HAVE_GFC_REAL_16
     80 extern void cpu_time_16 (GFC_REAL_16 *);
     81 export_proto(cpu_time_16);
     82 
     83 void cpu_time_16 (GFC_REAL_16 *time)
     84 {
     85   long sec, usec;
     86   __cpu_time_1 (&sec, &usec);
     87   *time = sec + usec * GFC_REAL_16_LITERAL(1.e-6);
     88 }
     89 #endif
     90 
     91 extern void second_sub (GFC_REAL_4 *);
     92 export_proto(second_sub);
     93 
     94 void
     95 second_sub (GFC_REAL_4 *s)
     96 {
     97   cpu_time_4 (s);
     98 }
     99 
    100 extern GFC_REAL_4 second (void);
    101 export_proto(second);
    102 
    103 GFC_REAL_4
    104 second (void)
    105 {
    106   GFC_REAL_4 s;
    107   cpu_time_4 (&s);
    108   return s;
    109 }
    110