1/* Implementation of the CPU_TIME intrinsic.
2   Copyright (C) 2003-2020 Free Software Foundation, Inc.
3
4This file is part of the GNU Fortran runtime library (libgfortran).
5
6Libgfortran is free software; you can redistribute it and/or
7modify it under the terms of the GNU General Public
8License as published by the Free Software Foundation; either
9version 3 of the License, or (at your option) any later version.
10
11Libgfortran is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16Under Section 7 of GPL version 3, you are granted additional
17permissions described in the GCC Runtime Library Exception, version
183.1, as published by the Free Software Foundation.
19
20You should have received a copy of the GNU General Public License and
21a copy of the GCC Runtime Library Exception along with this program;
22see 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
29static 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
46extern void cpu_time_4 (GFC_REAL_4 *);
47iexport_proto(cpu_time_4);
48
49void 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}
55iexport(cpu_time_4);
56
57extern void cpu_time_8 (GFC_REAL_8 *);
58export_proto(cpu_time_8);
59
60void 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
68extern void cpu_time_10 (GFC_REAL_10 *);
69export_proto(cpu_time_10);
70
71void 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
80extern void cpu_time_16 (GFC_REAL_16 *);
81export_proto(cpu_time_16);
82
83void 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
91extern void second_sub (GFC_REAL_4 *);
92export_proto(second_sub);
93
94void
95second_sub (GFC_REAL_4 *s)
96{
97  cpu_time_4 (s);
98}
99
100extern GFC_REAL_4 second (void);
101export_proto(second);
102
103GFC_REAL_4
104second (void)
105{
106  GFC_REAL_4 s;
107  cpu_time_4 (&s);
108  return s;
109}
110