| 1 | /* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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| 2 | This file is part of GNU Fortran libU77 library.
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| 3 |
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| 4 | This library is free software; you can redistribute it and/or modify it
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| 5 | under the terms of the GNU Library General Public License as published
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| 6 | by the Free Software Foundation; either version 2 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | GNU Fortran is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | Library General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Library General Public
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| 15 | License along with GNU Fortran; see the file COPYING.LIB. If
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| 16 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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| 17 | Boston, MA 02111-1307, USA. */
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| 18 |
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| 19 | #ifdef HAVE_CONFIG_H
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| 20 | #include "config.h"
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| 21 | #endif
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| 22 | #if HAVE_STDLIB_H
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| 23 | # include <stdlib.h>
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| 24 | #endif
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| 25 | #if HAVE_UNISTD_H
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| 26 | # include <unistd.h>
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| 27 | #endif
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| 28 | #include <sys/types.h>
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| 29 | #if HAVE_SYS_TIMES_H
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| 30 | # include <sys/times.h>
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| 31 | #endif
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| 32 | #if HAVE_SYS_PARAM_H
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| 33 | # include <sys/param.h>
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| 34 | #endif
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| 35 | #if HAVE_GETRUSAGE
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| 36 | # include <sys/time.h>
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| 37 | # include <sys/resource.h>
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| 38 | #endif
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| 39 | #if defined (_WIN32)
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| 40 | # include <windows.h>
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| 41 | # undef min
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| 42 | # undef max
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| 43 | #endif
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| 44 | #include <errno.h> /* for ENOSYS */
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| 45 | #include "f2c.h"
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| 46 |
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| 47 | /* For dtime, etime we store the clock tick parameter (clk_tck) the
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| 48 | first time either of them is invoked rather than each time. This
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| 49 | approach probably speeds up each invocation by avoiding a system
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| 50 | call each time, but means that the overhead of the first call is
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| 51 | different to all others. */
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| 52 | static long clk_tck = 0;
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| 53 |
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| 54 | #ifdef KR_headers
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| 55 | double G77_dtime_0 (tarray)
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| 56 | real tarray[2];
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| 57 | #else
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| 58 | double G77_dtime_0 (real tarray[2])
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| 59 | #endif
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| 60 | {
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| 61 | #if defined (_WIN32)
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| 62 | static int win32_platform = -1;
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| 63 |
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| 64 | if (win32_platform == -1)
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| 65 | {
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| 66 | OSVERSIONINFO osv;
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| 67 | osv.dwOSVersionInfoSize = sizeof (osv);
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| 68 | GetVersionEx (&osv);
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| 69 | win32_platform = osv.dwPlatformId;
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| 70 | }
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| 71 |
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| 72 | /* We need to use this hack on non-NT platforms, where the first call
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| 73 | returns 0.0 and subsequent ones return the correct value. */
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| 74 | if (win32_platform != VER_PLATFORM_WIN32_NT)
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| 75 | {
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| 76 | static unsigned long long clock_freq;
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| 77 | static unsigned long long old_count;
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| 78 | unsigned long long count;
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| 79 | double delta;
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| 80 | LARGE_INTEGER counter_val;
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| 81 |
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| 82 | if (clock_freq == 0)
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| 83 | {
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| 84 | LARGE_INTEGER freq;
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| 85 | if (! QueryPerformanceFrequency (&freq))
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| 86 | {
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| 87 | errno = ENOSYS;
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| 88 | return 0.0;
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| 89 | }
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| 90 | else
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| 91 | {
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| 92 | clock_freq = ((unsigned long long) freq.HighPart << 32)
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| 93 | + ((unsigned) freq.LowPart);
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| 94 | }
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| 95 | }
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| 96 |
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| 97 | if (! QueryPerformanceCounter (&counter_val))
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| 98 | return -1.0;
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| 99 |
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| 100 | count = ((unsigned long long) counter_val.HighPart << 32)
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| 101 | + (unsigned) counter_val.LowPart;
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| 102 | delta = ((double) (count - old_count)) / clock_freq;
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| 103 | tarray[0] = (float) delta;
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| 104 | tarray[1] = 0.0;
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| 105 | old_count = count;
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| 106 | }
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| 107 | else
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| 108 | {
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| 109 | static unsigned long long old_utime, old_stime;
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| 110 | unsigned long long utime, stime;
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| 111 | FILETIME creation_time, exit_time, kernel_time, user_time;
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| 112 |
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| 113 | GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time,
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| 114 | &kernel_time, &user_time);
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| 115 | utime = ((unsigned long long) user_time.dwHighDateTime << 32)
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| 116 | + (unsigned) user_time.dwLowDateTime;
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| 117 | stime = ((unsigned long long) kernel_time.dwHighDateTime << 32)
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| 118 | + (unsigned) kernel_time.dwLowDateTime;
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| 119 |
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| 120 | tarray[0] = (utime - old_utime) / 1.0e7;
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| 121 | tarray[1] = (stime - old_stime) / 1.0e7;
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| 122 | old_utime = utime;
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| 123 | old_stime = stime;
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| 124 | }
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| 125 | return tarray[0] + tarray[1];
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| 126 |
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| 127 | #elif defined (HAVE_GETRUSAGE) || defined (HAVE_TIMES)
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| 128 | /* The getrusage version is only the default for convenience. */
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| 129 | #ifdef HAVE_GETRUSAGE
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| 130 | float utime, stime;
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| 131 | static float old_utime = 0.0, old_stime = 0.0;
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| 132 | struct rusage rbuff;
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| 133 |
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| 134 | if (getrusage (RUSAGE_SELF, &rbuff) != 0)
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| 135 | abort ();
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| 136 | utime = (float) (rbuff.ru_utime).tv_sec +
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| 137 | (float) (rbuff.ru_utime).tv_usec/1000000.0;
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| 138 | tarray[0] = utime - (float) old_utime;
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| 139 | stime = (float) (rbuff.ru_stime).tv_sec +
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| 140 | (float) (rbuff.ru_stime).tv_usec/1000000.0;
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| 141 | tarray[1] = stime - old_stime;
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| 142 | #else /* HAVE_GETRUSAGE */
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| 143 | time_t utime, stime;
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| 144 | static time_t old_utime = 0, old_stime = 0;
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| 145 | struct tms buffer;
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| 146 |
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| 147 | /* NeXTStep seems to define _SC_CLK_TCK but not to have sysconf;
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| 148 | fixme: does using _POSIX_VERSION help? */
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| 149 | # if defined _SC_CLK_TCK && defined _POSIX_VERSION
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| 150 | if (! clk_tck) clk_tck = sysconf(_SC_CLK_TCK);
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| 151 | # elif defined CLOCKS_PER_SECOND
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| 152 | if (! clk_tck) clk_tck = CLOCKS_PER_SECOND;
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| 153 | # elif defined CLK_TCK
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| 154 | if (! clk_tck) clk_tck = CLK_TCK;
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| 155 | # elif defined HZ
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| 156 | if (! clk_tck) clk_tck = HZ;
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| 157 | # elif defined HAVE_GETRUSAGE
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| 158 | # else
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| 159 | #error Dont know clock tick length
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| 160 | # endif
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| 161 | if (times(&buffer) == (clock_t)-1) return -1.0;
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| 162 | utime = buffer.tms_utime; stime = buffer.tms_stime;
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| 163 | tarray[0] = ((float)(utime - old_utime)) / (float)clk_tck;
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| 164 | tarray[1] = ((float)(stime - old_stime)) / (float)clk_tck;
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| 165 | #endif /* HAVE_GETRUSAGE */
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| 166 | old_utime = utime; old_stime = stime;
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| 167 | return (tarray[0]+tarray[1]);
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| 168 | #else /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */
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| 169 | errno = ENOSYS;
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| 170 | return 0.0;
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| 171 | #endif /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */
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| 172 | }
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