| /* Copyright (C) 1995, 1996 Free Software Foundation, Inc. |
| This file is part of GNU Fortran libU77 library. |
| |
| This library is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Library General Public License as published |
| by the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| GNU Fortran is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with GNU Fortran; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #if HAVE_STDLIB_H |
| # include <stdlib.h> |
| #endif |
| #if HAVE_UNISTD_H |
| # include <unistd.h> |
| #endif |
| #include <sys/types.h> |
| #if HAVE_SYS_TIMES_H |
| # include <sys/times.h> |
| #endif |
| #if HAVE_SYS_PARAM_H |
| # include <sys/param.h> |
| #endif |
| #if HAVE_GETRUSAGE |
| # include <sys/time.h> |
| # include <sys/resource.h> |
| #endif |
| #if defined (_WIN32) |
| # include <windows.h> |
| # undef min |
| # undef max |
| #endif |
| #include <errno.h> /* for ENOSYS */ |
| #include "f2c.h" |
| |
| /* For dtime, etime we store the clock tick parameter (clk_tck) the |
| first time either of them is invoked rather than each time. This |
| approach probably speeds up each invocation by avoiding a system |
| call each time, but means that the overhead of the first call is |
| different to all others. */ |
| static long clk_tck = 0; |
| |
| #ifdef KR_headers |
| double G77_dtime_0 (tarray) |
| real tarray[2]; |
| #else |
| double G77_dtime_0 (real tarray[2]) |
| #endif |
| { |
| #if defined (_WIN32) |
| static int win32_platform = -1; |
| |
| if (win32_platform == -1) |
| { |
| OSVERSIONINFO osv; |
| osv.dwOSVersionInfoSize = sizeof (osv); |
| GetVersionEx (&osv); |
| win32_platform = osv.dwPlatformId; |
| } |
| |
| /* We need to use this hack on non-NT platforms, where the first call |
| returns 0.0 and subsequent ones return the correct value. */ |
| if (win32_platform != VER_PLATFORM_WIN32_NT) |
| { |
| static unsigned long long clock_freq; |
| static unsigned long long old_count; |
| unsigned long long count; |
| double delta; |
| LARGE_INTEGER counter_val; |
| |
| if (clock_freq == 0) |
| { |
| LARGE_INTEGER freq; |
| if (! QueryPerformanceFrequency (&freq)) |
| { |
| errno = ENOSYS; |
| return 0.0; |
| } |
| else |
| { |
| clock_freq = ((unsigned long long) freq.HighPart << 32) |
| + ((unsigned) freq.LowPart); |
| } |
| } |
| |
| if (! QueryPerformanceCounter (&counter_val)) |
| return -1.0; |
| |
| count = ((unsigned long long) counter_val.HighPart << 32) |
| + (unsigned) counter_val.LowPart; |
| delta = ((double) (count - old_count)) / clock_freq; |
| tarray[0] = (float) delta; |
| tarray[1] = 0.0; |
| old_count = count; |
| } |
| else |
| { |
| static unsigned long long old_utime, old_stime; |
| unsigned long long utime, stime; |
| FILETIME creation_time, exit_time, kernel_time, user_time; |
| |
| GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time, |
| &kernel_time, &user_time); |
| utime = ((unsigned long long) user_time.dwHighDateTime << 32) |
| + (unsigned) user_time.dwLowDateTime; |
| stime = ((unsigned long long) kernel_time.dwHighDateTime << 32) |
| + (unsigned) kernel_time.dwLowDateTime; |
| |
| tarray[0] = (utime - old_utime) / 1.0e7; |
| tarray[1] = (stime - old_stime) / 1.0e7; |
| old_utime = utime; |
| old_stime = stime; |
| } |
| return tarray[0] + tarray[1]; |
| |
| #elif defined (HAVE_GETRUSAGE) || defined (HAVE_TIMES) |
| /* The getrusage version is only the default for convenience. */ |
| #ifdef HAVE_GETRUSAGE |
| float utime, stime; |
| static float old_utime = 0.0, old_stime = 0.0; |
| struct rusage rbuff; |
| |
| if (getrusage (RUSAGE_SELF, &rbuff) != 0) |
| abort (); |
| utime = (float) (rbuff.ru_utime).tv_sec + |
| (float) (rbuff.ru_utime).tv_usec/1000000.0; |
| tarray[0] = utime - (float) old_utime; |
| stime = (float) (rbuff.ru_stime).tv_sec + |
| (float) (rbuff.ru_stime).tv_usec/1000000.0; |
| tarray[1] = stime - old_stime; |
| #else /* HAVE_GETRUSAGE */ |
| time_t utime, stime; |
| static time_t old_utime = 0, old_stime = 0; |
| struct tms buffer; |
| |
| /* NeXTStep seems to define _SC_CLK_TCK but not to have sysconf; |
| fixme: does using _POSIX_VERSION help? */ |
| # if defined _SC_CLK_TCK && defined _POSIX_VERSION |
| if (! clk_tck) clk_tck = sysconf(_SC_CLK_TCK); |
| # elif defined CLOCKS_PER_SECOND |
| if (! clk_tck) clk_tck = CLOCKS_PER_SECOND; |
| # elif defined CLK_TCK |
| if (! clk_tck) clk_tck = CLK_TCK; |
| # elif defined HZ |
| if (! clk_tck) clk_tck = HZ; |
| # elif defined HAVE_GETRUSAGE |
| # else |
| #error Dont know clock tick length |
| # endif |
| if (times(&buffer) == (clock_t)-1) return -1.0; |
| utime = buffer.tms_utime; stime = buffer.tms_stime; |
| tarray[0] = ((float)(utime - old_utime)) / (float)clk_tck; |
| tarray[1] = ((float)(stime - old_stime)) / (float)clk_tck; |
| #endif /* HAVE_GETRUSAGE */ |
| old_utime = utime; old_stime = stime; |
| return (tarray[0]+tarray[1]); |
| #else /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */ |
| errno = ENOSYS; |
| return 0.0; |
| #endif /* ! HAVE_GETRUSAGE && ! HAVE_TIMES */ |
| } |