1 /* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
2 This file is part of GNU Fortran libU77 library.
4 This library is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Library General Public License as published
6 by the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 GNU Fortran is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with GNU Fortran; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
25 #include <sys/types.h>
27 # include <sys/times.h>
30 # include <sys/param.h>
33 # include <sys/time.h>
34 # include <sys/resource.h>
41 #include <errno.h> /* for ENOSYS */
44 /* For dtime, etime we store the clock tick parameter (clk_tck) the
45 first time either of them is invoked rather than each time. This
46 approach probably speeds up each invocation by avoiding a system
47 call each time, but means that the overhead of the first call is
48 different to all others. */
49 static long clk_tck
= 0;
52 double G77_etime_0 (tarray
)
55 double G77_etime_0 (real tarray
[2])
59 static int win32_platform
= -1;
60 double usertime
, systime
;
62 if (win32_platform
== -1)
65 osv
.dwOSVersionInfoSize
= sizeof (osv
);
67 win32_platform
= osv
.dwPlatformId
;
70 /* non-NT platforms don't have a clue as to how long a process has
71 been running, so simply return the uptime. Bad judgement call? */
72 if (win32_platform
!= VER_PLATFORM_WIN32_NT
)
74 static unsigned long long clock_freq
;
75 static unsigned long long old_count
;
76 unsigned long long count
;
77 LARGE_INTEGER counter_val
;
82 if (! QueryPerformanceFrequency (&freq
))
89 clock_freq
= ((unsigned long long) freq
.HighPart
<< 32)
90 + ((unsigned) freq
.LowPart
);
91 if (! QueryPerformanceCounter (&counter_val
))
93 old_count
= ((unsigned long long) counter_val
.HighPart
<< 32)
94 + (unsigned) counter_val
.LowPart
;
98 if (! QueryPerformanceCounter (&counter_val
))
101 count
= ((unsigned long long) counter_val
.HighPart
<< 32)
102 + (unsigned) counter_val
.LowPart
;
103 tarray
[0] = usertime
= (double) (count
- old_count
) / clock_freq
;
104 tarray
[1] = systime
= 0.0;
108 FILETIME creation_time
, exit_time
, kernel_time
, user_time
;
109 unsigned long long utime
, stime
;
111 GetProcessTimes (GetCurrentProcess (), &creation_time
, &exit_time
,
112 &kernel_time
, &user_time
);
113 utime
= ((unsigned long long) user_time
.dwHighDateTime
<< 32)
114 + (unsigned) user_time
.dwLowDateTime
;
115 stime
= ((unsigned long long) kernel_time
.dwHighDateTime
<< 32)
116 + (unsigned) kernel_time
.dwLowDateTime
;
118 tarray
[0] = usertime
= utime
/ 1.0e7
;
119 tarray
[1] = systime
= stime
/ 1.0e7
;
121 return usertime
+ systime
;
123 #elif defined (HAVE_GETRUSAGE) || defined (HAVE_TIMES)
124 /* The getrusage version is only the default for convenience. */
125 #ifdef HAVE_GETRUSAGE
128 if (getrusage (RUSAGE_SELF
, &rbuff
) != 0)
130 tarray
[0] = ((float) (rbuff
.ru_utime
).tv_sec
+
131 (float) (rbuff
.ru_utime
).tv_usec
/1000000.0);
132 tarray
[1] = ((float) (rbuff
.ru_stime
).tv_sec
+
133 (float) (rbuff
.ru_stime
).tv_usec
/1000000.0);
134 #else /* HAVE_GETRUSAGE */
137 /* NeXTStep seems to define _SC_CLK_TCK but not to have sysconf;
138 fixme: does using _POSIX_VERSION help? */
139 # if defined _SC_CLK_TCK && defined _POSIX_VERSION
140 if (! clk_tck
) clk_tck
= sysconf(_SC_CLK_TCK
);
141 # elif defined CLOCKS_PER_SECOND
142 if (! clk_tck
) clk_tck
= CLOCKS_PER_SECOND
;
143 # elif defined CLK_TCK
144 if (! clk_tck
) clk_tck
= CLK_TCK
;
146 if (! clk_tck
) clk_tck
= HZ
;
147 # elif defined HAVE_GETRUSAGE
149 #error Dont know clock tick length
151 if (times(&buffer
) == (clock_t)-1) return -1.0;
152 tarray
[0] = (float) buffer
.tms_utime
/ (float)clk_tck
;
153 tarray
[1] = (float) buffer
.tms_stime
/ (float)clk_tck
;
154 #endif /* HAVE_GETRUSAGE */
155 return (tarray
[0]+tarray
[1]);
156 #else /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */
159 #endif /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */