diff options
Diffstat (limited to 'gnu/egcs/libf2c/libU77/dtime_.c')
| -rw-r--r-- | gnu/egcs/libf2c/libU77/dtime_.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/gnu/egcs/libf2c/libU77/dtime_.c b/gnu/egcs/libf2c/libU77/dtime_.c new file mode 100644 index 00000000000..aa34bc027e0 --- /dev/null +++ b/gnu/egcs/libf2c/libU77/dtime_.c @@ -0,0 +1,169 @@ +/* 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_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 */ +} |