gnushogi/tcontrl.c

   1 /*
   2  * FILE: tcontrl.c
   3  *
   4  * ----------------------------------------------------------------------
   5  *
   6  * Copyright (c) 2012 Free Software Foundation
   7  *
   8  * GNU SHOGI is based on GNU CHESS
   9  *
  10  * This file is part of GNU SHOGI.
  11  *
  12  * GNU Shogi is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 3 of the License,
  15  * or (at your option) any later version.
  16  *
  17  * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
  18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with GNU Shogi; see the file COPYING. If not, see
  24  * <http://www.gnu.org/licenses/>.
  25  * ----------------------------------------------------------------------
  26  *
  27  */
  28
  29
  30 #include "gnushogi.h"
  31 #include <math.h>
  32
  33 #define ALTERNATIVE_TC
  34
  35
  36 /*
  37  * In a networked enviroment gnushogi might be compiled on different hosts
  38  * with different random number generators; that is not acceptable if they
  39  * are going to share the same transposition table.
  40  */
  41
  42 static unsigned long next = 1;
  43
  44 unsigned int
  45 urand(void)
  46 {
  47     next *= 1103515245;
  48     next += 12345;
  49     return ((unsigned int) (next >> 16) & 0xFFFF);
  50 }
  51
  52
  53
  54 void
  55 gsrand(unsigned int seed)
  56 {
  57     next = seed;
  58 }
  59
  60
  61
  62 void
  63 TimeCalc()
  64 {
  65     /* adjust number of moves remaining in gamein games */
  66     int increment = 0;
  67     int topsum = 0;
  68     int tcompsum = 0;
  69     int me, him;
  70     int i;
  71
  72     /* Don't do anything until you have enough numbers. */
  73     if (GameCnt < (MINGAMEIN * 2))
  74         return;
  75
  76     /* Calculate average time in sec for last MINGAMEIN moves. */
  77     for (i = 0; i < MINGAMEIN; i++)
  78     {
  79         tcompsum += timecomp[i];
  80         topsum += timeopp[i];
  81     }
  82
  83     topsum   /= (100 * MINGAMEIN);
  84     tcompsum /= (100 * MINGAMEIN);
  85
  86     /* If I have less time than opponent add another move. */
  87     me  = TimeControl.clock[computer] / 100;
  88     him = TimeControl.clock[opponent] / 100;
  89
  90     if (me < him)
  91         increment += 2;
  92
  93     if (((him - me) > 60) || ((me < him) && (me < 120)))
  94         increment++;
  95
  96     /* If I am losing more time with each move add another. */
  97     /* If (!((me - him) > 60) && tcompsum > topsum) increment++; */
  98
  99     if (tcompsum > topsum)
 100     {
 101         increment += 2;
 102     }
 103     else if ((TimeControl.moves[computer] < MINMOVES) && !increment)
 104     {
 105         /* ... but don't let moves go below MINMOVES. */
 106         increment++;
 107     }
 108     else if ((me > him) && (tcompsum < topsum))
 109     {
 110         /* If I am doing really well use more time per move. */
 111         increment = -1;
 112     }
 113
 114     /* If not fischer clock be careful about time. */
 115     /* CHECKME: what's a fischer clock? */
 116
 117     if ((TCadd == 0) && (increment > 0))
 118         increment += 2;
 119
 120     if ((me == 0) && (increment > 0))
 121         increment += 2;
 122
 123     TimeControl.moves[computer] += increment;
 124 }
 125
 126
 127
 128 /*
 129  * Set ResponseTime, TCcount, and TCleft.
 130  */
 131
 132 void SetResponseTime(short side)
 133 {
 134 #ifdef ALTERNATIVE_TC
 135     int DetermineTCcount = true;
 136
 137     if (TCflag)
 138     {
 139         TCcount = 0;
 140
 141         if (TimeControl.moves[side] < 1)
 142             TimeControl.moves[side] = 1;
 143
 144         /* special case time per move specified */
 145         if (flag.onemove)
 146         {
 147             ResponseTime = TimeControl.clock[side] - 100;
 148             TCleft = 0;
 149         }
 150         else
 151         {
 152             /* calculate avg time per move remaining */
 153             if (TimeControl.clock[side] <= 0)
 154             {
 155                 ResponseTime = 0;
 156                 TCleft = (long)MINRESPONSETIME / MAXTCCOUNTX;
 157             }
 158             else
 159             {
 160                 short rtf = in_opening_stage ? 8 : 2;
 161                 short tcq = in_opening_stage ? 2 : 4;
 162
 163                 TimeControl.clock[side] += TCadd;
 164                 ResponseTime = (TimeControl.clock[side])
 165                     / (((TimeControl.moves[side]) * rtf) + 1);
 166                 TCleft = (long)ResponseTime / tcq;
 167                 ResponseTime += TCadd / 2;
 168             }
 169
 170             if (TimeControl.moves[side] < 5)
 171             {
 172                 TCcount = MAXTCCOUNTX - 10;
 173
 174                 if (TCcount < 0)
 175                     TCcount = 0;
 176
 177                 DetermineTCcount = false;
 178             }
 179         }
 180
 181         if (ResponseTime < MINRESPONSETIME)
 182         {
 183             ResponseTime = MINRESPONSETIME;
 184             TCcount = MAXTCCOUNTX - 10;
 185
 186             if (TCcount < 0)
 187                 TCcount = 0;
 188
 189             DetermineTCcount = false;
 190         }
 191
 192         if (!hard_time_limit && (ResponseTime < 2 * MINRESPONSETIME))
 193         {
 194             TCcount = MAXTCCOUNTX - 10;
 195
 196             if (TCcount < 0)
 197                 TCcount = 0;
 198
 199             DetermineTCcount = false;
 200         }
 201     }
 202     else
 203     {
 204         TCleft = 0;
 205         ResponseTime = MaxResponseTime;
 206         ElapsedTime(COMPUTE_AND_INIT_MODE);
 207     }
 208
 209     if (DetermineTCcount)
 210     {
 211         if (TCleft )
 212         {
 213             int AllowedCounts
 214                 = ((int)((TimeControl.clock[side] - ResponseTime)) / 2)
 215                 / TCleft;
 216
 217             if (AllowedCounts <= 0)
 218                 TCcount = MAXTCCOUNTX;
 219             else if (AllowedCounts > MAXTCCOUNTX)
 220                 TCcount = 0;
 221             else
 222                 TCcount = MAXTCCOUNTX - AllowedCounts;
 223         }
 224         else
 225         {
 226             TCcount = MAXTCCOUNTX;
 227         }
 228     }
 229
 230     if (ResponseTime < MINRESPONSETIME)
 231         ResponseTime = MINRESPONSETIME;
 232
 233 #else
 234
 235     if (TCflag)
 236     {
 237         TCcount = 0;
 238
 239         if (TimeControl.moves[side] < 1)
 240             TimeControl.moves[side] = 1;
 241
 242         /* special case time per move specified */
 243         if (flag.onemove)
 244         {
 245             ResponseTime = TimeControl.clock[side] - 100;
 246             TCleft = 0;
 247         }
 248         else
 249         {
 250             /* calculate avg time per move remaining */
 251             TimeControl.clock[side] += TCadd;
 252
 253             ResponseTime = (TimeControl.clock[side])
 254                 / (((TimeControl.moves[side]) * 2) + 1);
 255             TCleft = (int) ResponseTime / 3;
 256             ResponseTime += TCadd / 2;
 257
 258             if (TimeControl.moves[side] < 5)
 259                 TCcount = MAXTCCOUNTX - 10;
 260         }
 261
 262         if (ResponseTime < 101)
 263         {
 264             ResponseTime = 100;
 265             TCcount = MAXTCCOUNTX - 10;
 266         }
 267         else if (ResponseTime < 200)
 268         {
 269             TCcount = MAXTCCOUNTX - 10;
 270         }
 271     }
 272     else
 273     {
 274         ResponseTime = MaxResponseTime;
 275         TCleft = 0;
 276         ElapsedTime(COMPUTE_AND_INIT_MODE);
 277     }
 278
 279     if (TCleft)
 280     {
 281         TCcount = ((int)((TimeControl.clock[side] - ResponseTime)) / 2)
 282             / TCleft;
 283
 284         if (TCcount > MAXTCCOUNTX)
 285             TCcount = 0;
 286         else
 287             TCcount = MAXTCCOUNTX - TCcount;
 288     }
 289     else
 290     {
 291         TCcount = MAXTCCOUNTX;
 292     }
 293 #endif
 294
 295     assert(TCcount <= MAXTCCOUNTX);
 296 }
 297
 298
 299
 300 void
 301 CheckForTimeout(int score, int globalscore, int Jscore, int zwndw)
 302 {
 303     if (flag.musttimeout || (Sdepth >= MaxSearchDepth))
 304         flag.timeout = true;
 305
 306     else if (TCflag && (Sdepth > (MINDEPTH - 1)) && (TCcount < MAXTCCOUNTR))
 307     {
 308         if (killr0[1] != PrVar[1] /* || Killr0[2] != PrVar[2] */)
 309         {
 310             TCcount++;
 311             ExtraTime += TCleft;
 312         }
 313
 314         if ((TCcount < MAXTCCOUNTR)
 315             && (abs(score - globalscore) / Sdepth) > ZDELTA)
 316         {
 317             TCcount++;
 318             ExtraTime += TCleft;
 319         }
 320     }
 321
 322     if ((score > (Jscore - zwndw)) && (score > (Tree[1].score + 250)))
 323         ExtraTime = 0;
 324
 325     ElapsedTime(COMPUTE_MODE);
 326
 327     if (root->flags & exact)
 328         flag.timeout = true;
 329     /*else if (Tree[1].score < -SCORE_LIMIT) flag.timeout = true;
 330      */
 331 #if defined OLDTIME || !defined HAVE_GETTIMEOFDAY
 332     else if (!(Sdepth < MINDEPTH)
 333              && TCflag
 334              && ((4 * et) > (2*ResponseTime + ExtraTime)))
 335         flag.timeout = true;
 336 #else
 337     else if (!(Sdepth < MINDEPTH)
 338              && TCflag
 339              && ((int)(1.93913099l * (pow((double)et, 1.12446928l)))
 340                  > (ResponseTime + ExtraTime)))
 341         flag.timeout = true;
 342 #endif
 343
 344     if (flag.timeout)
 345         ShowMessage("timeout");
 346 }