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 3 of the License,
  20  * or (at your option) any 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, see
  29  * <http://www.gnu.org/licenses/>.
  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 #if HAVE_ERRNO_H
  46 /* Definition of errno(). */
  47 #include <errno.h>
  48 #endif
  49
  50 /* Forward declarations. */
  51
  52 void ElapsedTime_NOFIONREAD(ElapsedTime_mode iop);
  53 void ElapsedTime_FIONREAD(ElapsedTime_mode iop);
  54
  55
  56 /*
  57  * Determine the time that has passed since the search was started. If the
  58  * elapsed time exceeds the target(ResponseTime + ExtraTime) then set timeout
  59  * to true which will terminate the search.
  60  * iop = COMPUTE_MODE calculate et, bump ETnodes
  61  * iop = COMPUTE_AND_INIT_MODE calculate et, set timeout if time exceeded,
  62  *     set reference time
  63  */
  64
  65 /*
  66  * ElapsedTime() is actually a wrapper function around the different
  67  * versions of ElapsedTime_XXX().  This allows us to compile all the
  68  * different ways of measuring time in one executable.
  69  */
  70
  71 void
  72 ElapsedTime(ElapsedTime_mode iop)
  73 {
  74     switch (display_type)
  75     {
  76     case DISPLAY_RAW:
  77         ElapsedTime_NOFIONREAD(iop);
  78         break;
  79
  80     default:
  81         ElapsedTime_FIONREAD(iop);
  82         break;
  83     }
  84 }
  85
  86
  87
  88 #ifdef HAVE_GETTIMEOFDAY
  89 void
  90 ElapsedTime_FIONREAD(ElapsedTime_mode iop)
  91 {
  92     long current_time;
  93     int  i;
  94     int  nchar;
  95
  96     struct timeval tv;
  97
  98     if ((i = ioctl((int) 0, FIONREAD, &nchar)))
  99     {
 100         perror("FIONREAD");
 101         fprintf(stderr,
 102                 "You probably have a non-ANSI <ioctl.h>; "
 103                 "see README. %d %d %x\n",
 104                 i, errno, FIONREAD);
 105         exit(1);
 106     }
 107
 108     if (nchar)
 109     {
 110         if (!flag.timeout)
 111             flag.back = true;
 112
 113         flag.bothsides = false;
 114     }
 115
 116     gettimeofday(&tv, NULL);
 117     current_time = tv.tv_sec*100 + (tv.tv_usec/10000);
 118
 119 #  ifdef INTERRUPT_TEST
 120     if (iop == INIT_INTERRUPT_MODE)
 121     {
 122         itime0 = current_time;
 123     }
 124     else if (iop == COMPUTE_INTERRUPT_MODE)
 125     {
 126         it = current_time - itime0;
 127     }
 128     else
 129 #  endif
 130     {
 131         et = current_time - time0;
 132         ETnodes = NodeCnt + znodes;
 133
 134         if (et < 0)
 135         {
 136 #  ifdef INTERRUPT_TEST
 137             printf("elapsed time %ld not positive\n", et);
 138 #  endif
 139             et = 0;
 140         }
 141
 142         if (iop == COMPUTE_AND_INIT_MODE)
 143         {
 144             if ((et > ResponseTime + ExtraTime) && (Sdepth > MINDEPTH))
 145                 flag.timeout = true;
 146
 147             time0 = current_time;
 148         }
 149
 150         if (!NOT_CURSES)
 151         {
 152 #  ifdef QUIETBACKGROUND
 153             if (!background)
 154 #  endif /* QUIETBACKGROUND */
 155                 UpdateClocks();
 156         }
 157     }
 158 }
 159
 160
 161 void
 162 ElapsedTime_NOFIONREAD(ElapsedTime_mode iop)
 163 {
 164     struct timeval tv;
 165     long current_time;
 166
 167     gettimeofday(&tv, NULL);
 168     current_time = tv.tv_sec*100 + (tv.tv_usec/10000);
 169
 170 #  ifdef INTERRUPT_TEST
 171     if (iop == INIT_INTERRUPT_MODE)
 172     {
 173         itime0 = current_time;
 174     }
 175     else if (iop == COMPUTE_INTERRUPT_MODE)
 176     {
 177         it = current_time - itime0;
 178     }
 179     else
 180 #  endif
 181     {
 182         et = current_time - time0;
 183         ETnodes = NodeCnt + znodes;
 184
 185         if (et < 0)
 186         {
 187 #  ifdef INTERRUPT_TEST
 188             printf("elapsed time %ld not positive\n", et);
 189 #  endif
 190             et = 0;
 191         }
 192
 193         if (iop == COMPUTE_AND_INIT_MODE)
 194         {
 195             if ((et > ResponseTime + ExtraTime) && (Sdepth > MINDEPTH))
 196                 flag.timeout = true;
 197
 198             time0 = current_time;
 199         }
 200
 201         if (!NOT_CURSES)
 202         {
 203 #  ifdef QUIETBACKGROUND
 204             if (!background)
 205 #  endif /* QUIETBACKGROUND */
 206                 UpdateClocks();
 207         }
 208     }
 209 }
 210
 211
 212 #else /* !HAVE_GETTIMEOFDAY */
 213
 214
 215 /*
 216  * Determine the time that has passed since the search was started.  If the
 217  * elapsed time exceeds the target (ResponseTime + ExtraTime) then set
 218  * timeout to true which will terminate the search.
 219  *
 220  * iop = 0   calculate et, bump ETnodes
 221  * iop = 1   calculate et, set timeout if time exceeded, calculate et
 222  *
 223  */
 224
 225 void
 226 ElapsedTime_FIONREAD(ElapsedTime_mode iop)
 227 {
 228     long current_time;
 229     int  nchar;
 230     int  i;
 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