Make server address into an UCI option.

[stockfish] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index 063ce76e3503d8b6e27107444c7548fb69e8ce84..d0817a3d07b8b3c7c6ab126645af04e71afb2a77 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -19,14 +19,142 @@
 */
 
 #include <iostream>
+#include <thread>
 
 #include "bitboard.h"
 #include "position.h"
 #include "search.h"
 #include "thread.h"
+#include "tt.h"
 #include "uci.h"
 #include "syzygy/tbprobe.h"
 
+#include <grpc/grpc.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include "hashprobe.h"
+#include "hashprobe.grpc.pb.h"
+
+using grpc::Server;
+using grpc::ServerBuilder;
+using grpc::ServerContext;
+using grpc::Status;
+using grpc::StatusCode;
+using namespace hashprobe;
+
+Status HashProbeImpl::Probe(ServerContext* context,
+                            const HashProbeRequest* request,
+                           HashProbeResponse *response) {
+       Position pos(request->fen(), /*isChess960=*/false, Threads.main());
+       if (!pos.pos_is_ok()) {
+               return Status(StatusCode::INVALID_ARGUMENT, "Invalid FEN");
+       }
+
+       bool invert = (pos.side_to_move() == BLACK);
+       Search::StateStackPtr setup_states = Search::StateStackPtr(new std::stack<StateInfo>);
+
+       ProbeMove(&pos, setup_states.get(), invert, response->mutable_root());
+
+       MoveList<LEGAL> moves(pos);
+       for (const ExtMove* em = moves.begin(); em != moves.end(); ++em) {
+               HashProbeLine *line = response->add_line();
+               FillMove(em->move, line->mutable_move());
+               setup_states->push(StateInfo());
+               pos.do_move(em->move, setup_states->top(), pos.gives_check(em->move, CheckInfo(pos)));
+               ProbeMove(&pos, setup_states.get(), !invert, line);
+               pos.undo_move(em->move);
+       }
+
+       return Status::OK;
+}
+
+void HashProbeImpl::FillMove(Move move, HashProbeMove* decoded) {
+       if (!is_ok(move)) return;
+
+       Square from = from_sq(move);
+       Square to = to_sq(move);
+
+       if (type_of(move) == CASTLING) {
+               to = make_square(to > from ? FILE_G : FILE_C, rank_of(from));
+       }
+               
+       decoded->set_from_sq(UCI::square(from));
+       decoded->set_to_sq(UCI::square(to));
+
+       if (type_of(move) == PROMOTION) {
+               decoded->set_promotion(std::string() + " PNBRQK"[promotion_type(move)]);
+       }
+}
+
+void HashProbeImpl::ProbeMove(Position* pos, std::stack<StateInfo>* setup_states, bool invert, HashProbeLine* response) {
+       bool found;
+       TTEntry *entry = TT.probe(pos->key(), found);
+       response->set_found(found);
+       if (found) {
+               Value value = entry->value();
+               Value eval = entry->eval();
+               Bound bound = entry->bound();
+
+               if (invert) {
+                       value = -value;
+                       eval = -eval;
+                       if (bound == BOUND_UPPER) {
+                               bound = BOUND_LOWER;
+                       } else if (bound == BOUND_LOWER) {
+                               bound = BOUND_UPPER;
+                       }
+               }
+
+               response->set_depth(entry->depth());
+               FillValue(eval, response->mutable_eval());
+               if (entry->depth() > DEPTH_NONE) {
+                       FillValue(value, response->mutable_value());
+               }
+               response->set_bound(HashProbeLine::ValueBound(bound));
+
+               // Follow the PV until we hit an illegal move.
+               std::stack<Move> pv;
+               std::set<Key> seen;
+               while (found && is_ok(entry->move())) {
+                       FillMove(entry->move(), response->add_pv());
+                       if (seen.count(pos->key())) break;
+                       pv.push(entry->move());
+                       seen.insert(pos->key());
+                       setup_states->push(StateInfo());
+                       pos->do_move(entry->move(), setup_states->top(), pos->gives_check(entry->move(), CheckInfo(*pos)));
+                       entry = TT.probe(pos->key(), found);
+               }
+
+               // Unroll the PV back again, so the Position object remains unchanged.
+               while (!pv.empty()) {
+                       pos->undo_move(pv.top());
+                       pv.pop();
+               }
+       }
+}
+
+void HashProbeImpl::FillValue(Value value, HashProbeScore* score) {
+       if (abs(value) < VALUE_MATE - MAX_PLY) {
+               score->set_score_type(HashProbeScore::SCORE_CP);
+               score->set_score_cp(value * 100 / PawnValueEg);
+       } else {
+               score->set_score_type(HashProbeScore::SCORE_MATE);
+               score->set_score_mate((value > 0 ? VALUE_MATE - value + 1 : -VALUE_MATE - value) / 2);
+       }
+}
+
+HashProbeThread::HashProbeThread(const std::string &server_address) {
+       builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
+       builder.RegisterService(&service);
+       server = std::move(builder.BuildAndStart());
+       std::cout << "Server listening on " << server_address << std::endl;
+       std::thread([this]{ server->Wait(); }).detach();
+}
+
+void HashProbeThread::Shutdown() {
+       server->Shutdown();
+}
+
 namespace PSQT {
   void init();
 }
@@ -42,10 +170,11 @@ int main(int argc, char* argv[]) {
   Bitbases::init();
   Search::init();
   Pawns::init();
-  Threads.init();
+  Threads.set(Options["Threads"]);
+  Search::clear(); // After threads are up
 
   UCI::loop(argc, argv);
 
-  Threads.exit();
+  Threads.set(0);
   return 0;
 }