git.sesse.net Git - stockfish/blob - src/main.cpp

   1 /*
   2   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   3   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   4   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
   5   Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
   6
   7   Stockfish is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   Stockfish is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <iostream>
  22 #include <thread>
  23
  24 #include "bitboard.h"
  25 #include "position.h"
  26 #include "search.h"
  27 #include "thread.h"
  28 #include "tt.h"
  29 #include "uci.h"
  30 #include "syzygy/tbprobe.h"
  31
  32 #include <grpc/grpc.h>
  33 #include <grpc++/server.h>
  34 #include <grpc++/server_builder.h>
  35 #include "hashprobe.grpc.pb.h"
  36
  37 using grpc::Server;
  38 using grpc::ServerBuilder;
  39 using grpc::ServerContext;
  40 using grpc::Status;
  41 using grpc::StatusCode;
  42
  43 class HashProbeImpl final : public HashProbe::Service {
  44 public:
  45         Status Probe(ServerContext* context,
  46                      const HashProbeRequest* request,
  47                      HashProbeResponse *response) {
  48                 Position pos(request->fen(), /*isChess960=*/false, Threads.main());
  49                 if (!pos.pos_is_ok()) {
  50                         return Status(StatusCode::INVALID_ARGUMENT, "Invalid FEN");
  51                 }
  52
  53                 bool invert = (pos.side_to_move() == BLACK);
  54
  55                 HashProbeMove *root_move = response->add_move();
  56                 root_move->set_move(MOVE_NONE);
  57                 ProbeMove(pos.key(), invert, root_move);
  58
  59                 MoveList<LEGAL> moves(pos);
  60                 for (const ExtMove* em = moves.begin(); em != moves.end(); ++em) {
  61                         HashProbeMove *move = response->add_move();
  62                         move->set_move(em->move);
  63                         ProbeMove(pos.key_after(em->move), !invert, move);
  64                 }
  65
  66                 return Status::OK;
  67         }
  68
  69         void ProbeMove(const int64_t key, bool invert, HashProbeMove* response) {
  70                 bool found;
  71                 TTEntry *entry = TT.probe(key, found);
  72                 response->set_found(found);
  73                 if (found) {
  74                         Value value = entry->value();
  75                         Value eval = entry->eval();
  76                         Bound bound = entry->bound();
  77
  78                         if (invert) {
  79                                 value = -value;
  80                                 eval = -eval;
  81                                 if (bound == BOUND_UPPER) {
  82                                         bound = BOUND_LOWER;
  83                                 } else if (bound == BOUND_LOWER) {
  84                                         bound = BOUND_UPPER;
  85                                 }
  86                         }
  87
  88                         response->set_pv_move(entry->move());
  89                         response->set_depth(entry->depth());
  90                         response->set_eval(eval);
  91                         response->set_value(value);
  92                         response->set_bound(HashProbeMove::ValueBound(bound));
  93                 }
  94         }
  95 };
  96
  97 void rpc_thread()
  98 {
  99         std::string server_address("0.0.0.0:50051");
 100         HashProbeImpl service;
 101
 102         ServerBuilder builder;
 103         builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
 104         builder.RegisterService(&service);
 105         std::unique_ptr<Server> server(builder.BuildAndStart());
 106         std::cout << "Server listening on " << server_address << std::endl;
 107         server->Wait();
 108 }
 109
 110 namespace PSQT {
 111   void init();
 112 }
 113
 114 int main(int argc, char* argv[]) {
 115
 116   std::cout << engine_info() << std::endl;
 117
 118   UCI::init(Options);
 119   PSQT::init();
 120   Bitboards::init();
 121   Position::init();
 122   Bitbases::init();
 123   Search::init();
 124   Pawns::init();
 125   Threads.set(Options["Threads"]);
 126   Search::clear(); // After threads are up
 127
 128   std::thread(&rpc_thread).detach();
 129
 130   UCI::loop(argc, argv);
 131
 132   Threads.set(0);
 133   return 0;
 134 }