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Rewrite async I/O

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Use the starting thread to wait for GUI input and instead use
the other threads to search. The consequence is that now think()
is alwasy started on a differnt thread than the caller that
returns immediately waiting for input. This reformat greatly
simplifies the code and is more in line with the common way
to implement this feature.

As a side effect now we don't need anymore Makefile tricks
with sleep() to allow profile builds.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-11-23 20:07:29 +01:00
parent e9dc2e9e1e
commit ed04c010eb
7 changed files with 134 additions and 203 deletions
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48
src/uci.cpp
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@@ -45,7 +45,7 @@ namespace {
void set_option(istringstream& up);
void set_position(Position& pos, istringstream& up);
bool go(Position& pos, istringstream& up);
void go(Position& pos, istringstream& up);
void perft(Position& pos, istringstream& up);
}
@@ -61,22 +61,22 @@ void uci_loop() {
string cmd, token;
bool quit = false;
while (!quit)
while (!quit && getline(cin, cmd))
{
Threads.getline(cmd);
istringstream is(cmd);
is >> skipws >> token;
if (token == "quit")
quit = true;
quit = (token == "quit");
else if (token == "stop")
{ /* avoid to reply "Unknown command: stop" */ }
if (token == "quit" || token == "stop" || token == "ponderhit")
{
uci_async_command(token);
Threads[0].wake_up(); // In case is waiting for stop or ponderhit
}
else if (token == "go")
quit = !go(pos, is);
go(pos, is);
else if (token == "ucinewgame")
pos.from_fen(StarFEN, false);
@@ -190,19 +190,21 @@ namespace {
// string, and then calls think(). Returns false if a quit command
// is received while thinking, true otherwise.
bool go(Position& pos, istringstream& is) {
void go(Position& pos, istringstream& is) {
string token;
SearchLimits limits;
std::vector<Move> searchMoves;
int time[] = { 0, 0 }, inc[] = { 0, 0 };
memset(&Limits, 0, sizeof(SearchLimits));
SearchMoves.clear();
RootPosition = &pos;
while (is >> token)
{
if (token == "infinite")
limits.infinite = true;
Limits.infinite = true;
else if (token == "ponder")
limits.ponder = true;
Limits.ponder = true;
else if (token == "wtime")
is >> time[WHITE];
else if (token == "btime")
@@ -212,23 +214,23 @@ namespace {
else if (token == "binc")
is >> inc[BLACK];
else if (token == "movestogo")
is >> limits.movesToGo;
is >> Limits.movesToGo;
else if (token == "depth")
is >> limits.maxDepth;
is >> Limits.maxDepth;
else if (token == "nodes")
is >> limits.maxNodes;
is >> Limits.maxNodes;
else if (token == "movetime")
is >> limits.maxTime;
is >> Limits.maxTime;
else if (token == "searchmoves")
while (is >> token)
searchMoves.push_back(move_from_uci(pos, token));
SearchMoves.push_back(move_from_uci(pos, token));
}
searchMoves.push_back(MOVE_NONE);
limits.time = time[pos.side_to_move()];
limits.increment = inc[pos.side_to_move()];
SearchMoves.push_back(MOVE_NONE);
Limits.time = time[pos.side_to_move()];
Limits.increment = inc[pos.side_to_move()];
return think(pos, limits, &searchMoves[0]);
Threads.start_thinking();
}