gnushogi/tcontrl.c

   1 /*
   2  * FILE: tcontrl.c
   3  *
   4  * ----------------------------------------------------------------------
   5  * Copyright (c) 1993, 1994, 1995 Matthias Mutz
   6  * Copyright (c) 1999 Michael Vanier and the Free Software Foundation
   7  * Copyright (c) 2008, 2013, 2014 Yann Dirson and the Free Software Foundation
   8  *
   9  * GNU SHOGI is based on GNU CHESS
  10  *
  11  * Copyright (c) 1988, 1989, 1990 John Stanback
  12  * Copyright (c) 1992 Free Software Foundation
  13  *
  14  * This file is part of GNU SHOGI.
  15  *
  16  * GNU Shogi is free software; you can redistribute it and/or modify it
  17  * under the terms of the GNU General Public License as published by the
  18  * Free Software Foundation; either version 3 of the License,
  19  * or (at your option) any later version.
  20  *
  21  * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
  22  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  23  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  24  * for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License along
  27  * with GNU Shogi; see the file COPYING. If not, see
  28  * <http://www.gnu.org/licenses/>.
  29  * ----------------------------------------------------------------------
  30  *
  31  */
  32
  33
  34 #include "gnushogi.h"
  35 #include <math.h>
  36
  37 #define ALTERNATIVE_TC
  38
  39
  40 /*
  41  * In a networked enviroment gnushogi might be compiled on different hosts
  42  * with different random number generators; that is not acceptable if they
  43  * are going to share the same transposition table.
  44  */
  45
  46 static unsigned long next = 1;
  47
  48 unsigned int
  49 urand(void)
  50 {
  51     next *= 1103515245;
  52     next += 12345;
  53     return ((unsigned int) (next >> 16) & 0xFFFF);
  54 }
  55
  56
  57
  58 void
  59 gsrand(unsigned int seed)
  60 {
  61     next = seed;
  62 }
  63
  64
  65
  66 void
  67 TimeCalc()
  68 {
  69     /* adjust number of moves remaining in gamein games */
  70     int increment = 0;
  71     int topsum = 0;
  72     int tcompsum = 0;
  73     int me, him;
  74     int i;
  75
  76     /* Don't do anything until you have enough numbers. */
  77     if (GameCnt < (MINGAMEIN * 2))
  78         return;
  79
  80     /* Calculate average time in sec for last MINGAMEIN moves. */
  81     for (i = 0; i < MINGAMEIN; i++)
  82     {
  83         tcompsum += timecomp[i];
  84         topsum += timeopp[i];
  85     }
  86
  87     topsum   /= (100 * MINGAMEIN);
  88     tcompsum /= (100 * MINGAMEIN);
  89
  90     /* If I have less time than opponent add another move. */
  91     me  = TimeControl.clock[computer] / 100;
  92     him = TimeControl.clock[opponent] / 100;
  93
  94     if (me < him)
  95         increment += 2;
  96
  97     if (((him - me) > 60) || ((me < him) && (me < 120)))
  98         increment++;
  99
 100     /* If I am losing more time with each move add another. */
 101     /* If (!((me - him) > 60) && tcompsum > topsum) increment++; */
 102
 103     if (tcompsum > topsum)
 104     {
 105         increment += 2;
 106     }
 107     else if ((TimeControl.moves[computer] < MINMOVES) && !increment)
 108     {
 109         /* ... but don't let moves go below MINMOVES. */
 110         increment++;
 111     }
 112     else if ((me > him) && (tcompsum < topsum))
 113     {
 114         /* If I am doing really well use more time per move. */
 115         increment = -1;
 116     }
 117
 118     /* If not fischer clock be careful about time. */
 119     /* CHECKME: what's a fischer clock? */
 120
 121     if ((TCadd == 0) && (increment > 0))
 122         increment += 2;
 123
 124     if ((me == 0) && (increment > 0))
 125         increment += 2;
 126
 127     TimeControl.moves[computer] += increment;
 128 }
 129
 130
 131
 132 /*
 133  * Set ResponseTime, TCcount, and TCleft.
 134  */
 135
 136 void SetResponseTime(short side)
 137 {
 138 #ifdef ALTERNATIVE_TC
 139     int DetermineTCcount = true;
 140
 141     if (TCflag)
 142     {
 143         TCcount = 0;
 144
 145         if (TimeControl.moves[side] < 1)
 146             TimeControl.moves[side] = 1;
 147
 148         /* special case time per move specified */
 149         if (flag.onemove)
 150         {
 151             ResponseTime = TimeControl.clock[side] - 100;
 152             TCleft = 0;
 153         }
 154         else
 155         {
 156             /* calculate avg time per move remaining */
 157             if (TimeControl.clock[side] <= 0)
 158             {
 159                 ResponseTime = 0;
 160                 TCleft = (long)MINRESPONSETIME / MAXTCCOUNTX;
 161             }
 162             else
 163             {
 164                 short rtf = in_opening_stage ? 8 : 2;
 165                 short tcq = in_opening_stage ? 2 : 4;
 166
 167                 TimeControl.clock[side] += TCadd;
 168                 ResponseTime = (TimeControl.clock[side])
 169                     / (((TimeControl.moves[side]) * rtf) + 1);
 170                 TCleft = (long)ResponseTime / tcq;
 171                 ResponseTime += TCadd / 2;
 172             }
 173
 174             if (TimeControl.moves[side] < 5)
 175             {
 176                 TCcount = MAXTCCOUNTX - 10;
 177
 178                 if (TCcount < 0)
 179                     TCcount = 0;
 180
 181                 DetermineTCcount = false;
 182             }
 183         }
 184
 185         if (ResponseTime < MINRESPONSETIME)
 186         {
 187             ResponseTime = MINRESPONSETIME;
 188             TCcount = MAXTCCOUNTX - 10;
 189
 190             if (TCcount < 0)
 191                 TCcount = 0;
 192
 193             DetermineTCcount = false;
 194         }
 195
 196         if (!hard_time_limit && (ResponseTime < 2 * MINRESPONSETIME))
 197         {
 198             TCcount = MAXTCCOUNTX - 10;
 199
 200             if (TCcount < 0)
 201                 TCcount = 0;
 202
 203             DetermineTCcount = false;
 204         }
 205     }
 206     else
 207     {
 208         TCleft = 0;
 209         ResponseTime = MaxResponseTime;
 210         ElapsedTime(COMPUTE_AND_INIT_MODE);
 211     }
 212
 213     if (DetermineTCcount)
 214     {
 215         if (TCleft )
 216         {
 217             int AllowedCounts
 218                 = ((int)((TimeControl.clock[side] - ResponseTime)) / 2)
 219                 / TCleft;
 220
 221             if (AllowedCounts <= 0)
 222                 TCcount = MAXTCCOUNTX;
 223             else if (AllowedCounts > MAXTCCOUNTX)
 224                 TCcount = 0;
 225             else
 226                 TCcount = MAXTCCOUNTX - AllowedCounts;
 227         }
 228         else
 229         {
 230             TCcount = MAXTCCOUNTX;
 231         }
 232     }
 233
 234     if (ResponseTime < MINRESPONSETIME)
 235         ResponseTime = MINRESPONSETIME;
 236
 237 #else
 238
 239     if (TCflag)
 240     {
 241         TCcount = 0;
 242
 243         if (TimeControl.moves[side] < 1)
 244             TimeControl.moves[side] = 1;
 245
 246         /* special case time per move specified */
 247         if (flag.onemove)
 248         {
 249             ResponseTime = TimeControl.clock[side] - 100;
 250             TCleft = 0;
 251         }
 252         else
 253         {
 254             /* calculate avg time per move remaining */
 255             TimeControl.clock[side] += TCadd;
 256
 257             ResponseTime = (TimeControl.clock[side])
 258                 / (((TimeControl.moves[side]) * 2) + 1);
 259             TCleft = (int) ResponseTime / 3;
 260             ResponseTime += TCadd / 2;
 261
 262             if (TimeControl.moves[side] < 5)
 263                 TCcount = MAXTCCOUNTX - 10;
 264         }
 265
 266         if (ResponseTime < 101)
 267         {
 268             ResponseTime = 100;
 269             TCcount = MAXTCCOUNTX - 10;
 270         }
 271         else if (ResponseTime < 200)
 272         {
 273             TCcount = MAXTCCOUNTX - 10;
 274         }
 275     }
 276     else
 277     {
 278         ResponseTime = MaxResponseTime;
 279         TCleft = 0;
 280         ElapsedTime(COMPUTE_AND_INIT_MODE);
 281     }
 282
 283     if (TCleft)
 284     {
 285         TCcount = ((int)((TimeControl.clock[side] - ResponseTime)) / 2)
 286             / TCleft;
 287
 288         if (TCcount > MAXTCCOUNTX)
 289             TCcount = 0;
 290         else
 291             TCcount = MAXTCCOUNTX - TCcount;
 292     }
 293     else
 294     {
 295         TCcount = MAXTCCOUNTX;
 296     }
 297 #endif
 298
 299     assert(TCcount <= MAXTCCOUNTX);
 300 }
 301
 302
 303
 304 void
 305 CheckForTimeout(int score, int globalscore, int Jscore, int zwndw)
 306 {
 307     if (flag.musttimeout || (Sdepth >= MaxSearchDepth))
 308         flag.timeout = true;
 309
 310     else if (TCflag && (Sdepth > (MINDEPTH - 1)) && (TCcount < MAXTCCOUNTR))
 311     {
 312         if (killr0[1] != PrVar[1] /* || Killr0[2] != PrVar[2] */)
 313         {
 314             TCcount++;
 315             ExtraTime += TCleft;
 316         }
 317
 318         if ((TCcount < MAXTCCOUNTR)
 319             && (abs(score - globalscore) / Sdepth) > ZDELTA)
 320         {
 321             TCcount++;
 322             ExtraTime += TCleft;
 323         }
 324     }
 325
 326     if ((score > (Jscore - zwndw)) && (score > (Tree[1].score + 250)))
 327         ExtraTime = 0;
 328
 329     ElapsedTime(COMPUTE_MODE);
 330
 331     if (root->flags & exact)
 332         flag.timeout = true;
 333     /*else if (Tree[1].score < -SCORE_LIMIT) flag.timeout = true;
 334      */
 335 #if defined OLDTIME || !defined HAVE_GETTIMEOFDAY
 336     else if (!(Sdepth < MINDEPTH)
 337              && TCflag
 338              && ((4 * et) > (2*ResponseTime + ExtraTime)))
 339         flag.timeout = true;
 340 #else
 341     else if (!(Sdepth < MINDEPTH)
 342              && TCflag
 343              && ((int)(1.93913099l * (pow((double)et, 1.12446928l)))
 344                  > (ResponseTime + ExtraTime)))
 345         flag.timeout = true;
 346 #endif
 347
 348     if (flag.timeout)
 349         dsp->ShowMessage("timeout");
 350 }
 351
 352
 353 /*
 354  * Determine the time that has passed since the search was started. If the
 355  * elapsed time exceeds the target(ResponseTime + ExtraTime) then set timeout
 356  * to true which will terminate the search.
 357  * iop = COMPUTE_MODE calculate et, bump ETnodes
 358  * iop = COMPUTE_AND_INIT_MODE calculate et, set timeout if time exceeded,
 359  *     set reference time
 360  */
 361 void
 362 ElapsedTime(ElapsedTime_mode iop)
 363 {
 364     long current_time;
 365 #ifdef HAVE_GETTIMEOFDAY
 366     struct timeval tv;
 367 #endif
 368
 369     dsp->PollForInput();
 370
 371 #ifdef HAVE_GETTIMEOFDAY
 372     gettimeofday(&tv, NULL);
 373     current_time = tv.tv_sec*100 + (tv.tv_usec/10000);
 374 #else
 375     et = ((current_time = time((long *) 0)) - time0) * 100;
 376 #endif
 377
 378 #ifdef INTERRUPT_TEST
 379     if (iop == INIT_INTERRUPT_MODE)
 380     {
 381         itime0 = current_time;
 382     }
 383     else if (iop == COMPUTE_INTERRUPT_MODE)
 384     {
 385         it = current_time - itime0;
 386     }
 387     else
 388 #endif
 389     {
 390 #ifdef HAVE_GETTIMEOFDAY
 391         et = current_time - time0;
 392 #endif
 393         ETnodes = NodeCnt + znodes;
 394
 395         if (et < 0)
 396         {
 397 #ifdef INTERRUPT_TEST
 398             printf("elapsed time %ld not positive\n", et);
 399 #endif
 400             et = 0;
 401         }
 402
 403         if (iop == COMPUTE_AND_INIT_MODE)
 404         {
 405             if ((et > (ResponseTime + ExtraTime)) && (Sdepth > MINDEPTH))
 406                 flag.timeout = true;
 407
 408             time0 = current_time;
 409         }
 410
 411 #ifdef QUIETBACKGROUND
 412         if (!background)
 413 #endif
 414             dsp->UpdateClocks();
 415     }
 416 }
 417
 418
 419 void
 420 SetTimeControl(void)
 421 {
 422     if (TCflag)
 423     {
 424         TimeControl.moves[black] = TimeControl.moves[white] = TCmoves;
 425         TimeControl.clock[black] += 6000L * TCminutes + TCseconds * 100;
 426         TimeControl.clock[white] += 6000L * TCminutes + TCseconds * 100;
 427     }
 428     else
 429     {
 430         TimeControl.moves[black] = TimeControl.moves[white] = 0;
 431         TimeControl.clock[black] = TimeControl.clock[white] = 0;
 432     }
 433
 434     flag.onemove = (TCmoves == 1);
 435     et = 0;
 436     ElapsedTime(COMPUTE_AND_INIT_MODE);
 437 }