1  /* Implementation of the CPU_TIME intrinsic.
       2     Copyright (C) 2003-2023 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  }