gnushogi/sysdeps.c

   1 /*
   2  * FILE: sysdeps.c
   3  *
   4  *     System-dependent functions for GNU Shogi.
   5  *
   6  * ----------------------------------------------------------------------
   7  * Copyright (c) 1993, 1994, 1995 Matthias Mutz
   8  * Copyright (c) 1999 Michael Vanier and the Free Software Foundation
   9  *
  10  * GNU SHOGI is based on GNU CHESS
  11  *
  12  * Copyright (c) 1988, 1989, 1990 John Stanback
  13  * Copyright (c) 1992 Free Software Foundation
  14  *
  15  * This file is part of GNU SHOGI.
  16  *
  17  * GNU Shogi is free software; you can redistribute it and/or modify it
  18  * under the terms of the GNU General Public License as published by the
  19  * Free Software Foundation; either version 1, or (at your option) any
  20  * later version.
  21  *
  22  * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
  23  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  24  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  25  * for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License along
  28  * with GNU Shogi; see the file COPYING.  If not, write to the Free
  29  * Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  30  * ----------------------------------------------------------------------
  31  *
  32  */
  33
  34 #include "gnushogi.h"
  35
  36 #if HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 #if HAVE_SYS_FILIO_H
  41 /* Definition of FIONREAD */
  42 #include <sys/filio.h>
  43 #endif
  44
  45
  46 /* Forward declarations. */
  47
  48 void ElapsedTime_NOFIONREAD(ElapsedTime_mode iop);
  49 void ElapsedTime_FIONREAD(ElapsedTime_mode iop);
  50
  51
  52 /*
  53  * Determine the time that has passed since the search was started. If the
  54  * elapsed time exceeds the target(ResponseTime + ExtraTime) then set timeout
  55  * to true which will terminate the search.
  56  * iop = COMPUTE_MODE calculate et, bump ETnodes
  57  * iop = COMPUTE_AND_INIT_MODE calculate et, set timeout if time exceeded,
  58  *     set reference time
  59  */
  60
  61 /*
  62  * ElapsedTime() is actually a wrapper function around the different
  63  * versions of ElapsedTime_XXX().  This allows us to compile all the
  64  * different ways of measuring time in one executable.
  65  */
  66
  67 void
  68 ElapsedTime(ElapsedTime_mode iop)
  69 {
  70     switch (display_type)
  71     {
  72     case DISPLAY_RAW:
  73         ElapsedTime_NOFIONREAD(iop);
  74         break;
  75
  76     default:
  77         ElapsedTime_FIONREAD(iop);
  78         break;
  79     }
  80 }
  81
  82
  83
  84 #ifdef HAVE_GETTIMEOFDAY
  85 void
  86 ElapsedTime_FIONREAD(ElapsedTime_mode iop)
  87 {
  88     long current_time;
  89     int  i;
  90     int  nchar;
  91
  92     struct timeval tv;
  93     extern int errno;
  94
  95     if ((i = ioctl((int) 0, FIONREAD, &nchar)))
  96     {
  97         perror("FIONREAD");
  98         fprintf(stderr,
  99                 "You probably have a non-ANSI <ioctl.h>; "
 100                 "see README. %d %d %x\n",
 101                 i, errno, FIONREAD);
 102         exit(1);
 103     }
 104
 105     if (nchar)
 106     {
 107         if (!flag.timeout)
 108             flag.back = true;
 109
 110         flag.bothsides = false;
 111     }
 112
 113     gettimeofday(&tv, NULL);
 114     current_time = tv.tv_sec*100 + (tv.tv_usec/10000);
 115
 116 #  ifdef INTERRUPT_TEST
 117     if (iop == INIT_INTERRUPT_MODE)
 118     {
 119         itime0 = current_time;
 120     }
 121     else if (iop == COMPUTE_INTERRUPT_MODE)
 122     {
 123         it = current_time - itime0;
 124     }
 125     else
 126 #  endif
 127     {
 128         et = current_time - time0;
 129         ETnodes = NodeCnt + znodes;
 130
 131         if (et < 0)
 132         {
 133 #  ifdef INTERRUPT_TEST
 134             printf("elapsed time %ld not positive\n", et);
 135 #  endif
 136             et = 0;
 137         }
 138
 139         if (iop == COMPUTE_AND_INIT_MODE)
 140         {
 141             if ((et > ResponseTime + ExtraTime) && (Sdepth > MINDEPTH))
 142                 flag.timeout = true;
 143
 144             time0 = current_time;
 145         }
 146
 147         if (!NOT_CURSES)
 148         {
 149 #  ifdef QUIETBACKGROUND
 150             if (!background)
 151 #  endif /* QUIETBACKGROUND */
 152                 UpdateClocks();
 153         }
 154     }
 155 }
 156
 157
 158 void
 159 ElapsedTime_NOFIONREAD(ElapsedTime_mode iop)
 160 {
 161     struct timeval tv;
 162     long current_time;
 163
 164     gettimeofday(&tv, NULL);
 165     current_time = tv.tv_sec*100 + (tv.tv_usec/10000);
 166
 167 #  ifdef INTERRUPT_TEST
 168     if (iop == INIT_INTERRUPT_MODE)
 169     {
 170         itime0 = current_time;
 171     }
 172     else if (iop == COMPUTE_INTERRUPT_MODE)
 173     {
 174         it = current_time - itime0;
 175     }
 176     else
 177 #  endif
 178     {
 179         et = current_time - time0;
 180         ETnodes = NodeCnt + znodes;
 181
 182         if (et < 0)
 183         {
 184 #  ifdef INTERRUPT_TEST
 185             printf("elapsed time %ld not positive\n", et);
 186 #  endif
 187             et = 0;
 188         }
 189
 190         if (iop == COMPUTE_AND_INIT_MODE)
 191         {
 192             if ((et > ResponseTime + ExtraTime) && (Sdepth > MINDEPTH))
 193                 flag.timeout = true;
 194
 195             time0 = current_time;
 196         }
 197
 198         if (!NOT_CURSES)
 199         {
 200 #  ifdef QUIETBACKGROUND
 201             if (!background)
 202 #  endif /* QUIETBACKGROUND */
 203                 UpdateClocks();
 204         }
 205     }
 206 }
 207
 208
 209 #else /* !HAVE_GETTIMEOFDAY */
 210
 211
 212 /*
 213  * Determine the time that has passed since the search was started.  If the
 214  * elapsed time exceeds the target (ResponseTime + ExtraTime) then set
 215  * timeout to true which will terminate the search.
 216  *
 217  * iop = 0   calculate et, bump ETnodes
 218  * iop = 1   calculate et, set timeout if time exceeded, calculate et
 219  *
 220  */
 221
 222 void
 223 ElapsedTime_FIONREAD(ElapsedTime_mode iop)
 224 {
 225     long current_time;
 226     int  nchar;
 227     int  i;
 228
 229     extern int errno;
 230
 231
 232     if ((i = ioctl((int) 0, FIONREAD, &nchar)))
 233     {
 234         perror("FIONREAD");
 235         fprintf(stderr,
 236                 "You probably have a non-ANSI <ioctl.h>; "
 237                 "see README. %d %d %x\n",
 238                 i, errno, FIONREAD);
 239         exit(1);
 240     }
 241
 242     if (nchar)
 243     {
 244         if (!flag.timeout)
 245             flag.back = true;
 246         flag.bothsides = false;
 247     }
 248
 249     et = ((current_time = time((long *) 0)) - time0) * 100;
 250
 251 #ifdef INTERRUPT_TEST
 252     if (iop == INIT_INTERRUPT_MODE)
 253     {
 254         itime0 = current_time;
 255     }
 256     else if (iop == COMPUTE_INTERRUPT_MODE)
 257     {
 258         it = current_time - itime0;
 259     }
 260     else
 261 #endif
 262     {
 263         ETnodes = NodeCnt + znodes;
 264
 265         if (et < 0)
 266         {
 267 #ifdef INTERRUPT_TEST
 268             printf("elapsed time %ld not positive\n", et);
 269 #endif
 270             et = 0;
 271         }
 272
 273         if (iop == COMPUTE_AND_INIT_MODE)
 274         {
 275             if ((et > (ResponseTime + ExtraTime)) && (Sdepth > MINDEPTH))
 276                 flag.timeout = true;
 277
 278             time0 = current_time;
 279         }
 280
 281         if (!NOT_CURSES)
 282         {
 283 #ifdef QUIETBACKGROUND
 284             if (!background)
 285 #endif /* QUIETBACKGROUND */
 286                 UpdateClocks();
 287         }
 288     }
 289 }
 290
 291
 292
 293 void
 294 ElapsedTime_NOFIONREAD(ElapsedTime_mode iop)
 295 {
 296     long current_time;
 297
 298     et = ((current_time = time((long *) 0)) - time0) * 100;
 299
 300 #ifdef INTERRUPT_TEST
 301     if (iop == INIT_INTERRUPT_MODE)
 302     {
 303         itime0 = current_time;
 304     }
 305     else if (iop == COMPUTE_INTERRUPT_MODE)
 306     {
 307         it = current_time - itime0;
 308     }
 309     else
 310 #endif
 311     {
 312         ETnodes = NodeCnt + znodes;
 313
 314         if (et < 0)
 315         {
 316 #ifdef INTERRUPT_TEST
 317             printf("elapsed time %ld not positive\n", et);
 318 #endif
 319             et = 0;
 320         }
 321
 322         if (iop == COMPUTE_AND_INIT_MODE)
 323         {
 324             if ((et > (ResponseTime + ExtraTime)) && (Sdepth > MINDEPTH))
 325                 flag.timeout = true;
 326
 327             time0 = current_time;
 328         }
 329
 330         if (!NOT_CURSES)
 331         {
 332 #ifdef QUIETBACKGROUND
 333             if (!background)
 334 #endif /* QUIETBACKGROUND */
 335                 UpdateClocks();
 336         }
 337     }
 338 }
 339
 340
 341 #endif /* HAVE_GETTIMEOFDAY */
 342
 343
 344
 345
 346