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Fix UCI 'button' options

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When a button fires UCIOption::operator=() is called and from
there the on_change() function. Now it happens that in case of
a button the on_change() function resets option's value to
"false" triggering again UCIOption::operator=() that calls again
on_change() and so on in an endless loop that is experienced
by the user as an application hang.

Rework the button logic to fix the issue and also be more clear
about how button works.

Reported by several people working with Scid and tracked down
to the "Clear Hash" UCI button by Steven Atkinson.

Bug recently introduced by 2ef5b4066e.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-03-17 10:29:33 +01:00
parent 9934b8ec31
commit ee838f56f7
2 changed files with 15 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/ucioption.cpp
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@@ -33,10 +33,10 @@ OptionsMap Options; // Global object
namespace {
/// 'On change' actions, triggered by an option's value change
void on_eval(UCIOption&) { Eval::init(); }
void on_threads(UCIOption&) { Threads.read_uci_options(); }
void on_hash_size(UCIOption& o) { TT.set_size(o); }
void on_clear_hash(UCIOption& o) { TT.clear(); o = false; } // UCI button
void on_eval(const UCIOption&) { Eval::init(); }
void on_threads(const UCIOption&) { Threads.read_uci_options(); }
void on_hash_size(const UCIOption& o) { TT.set_size(o); }
void on_clear_hash(const UCIOption&) { TT.clear(); }
/// Our case insensitive less() function as required by UCI protocol
bool ci_less(char c1, char c2) { return tolower(c1) < tolower(c2); }
@@ -74,7 +74,7 @@ OptionsMap::OptionsMap() {
o["Threads"] = UCIOption(cpus, 1, MAX_THREADS);
o["Use Sleeping Threads"] = UCIOption(true, on_threads);
o["Hash"] = UCIOption(32, 4, 8192, on_hash_size);
o["Clear Hash"] = UCIOption(false, on_clear_hash);
o["Clear Hash"] = UCIOption(on_clear_hash);
o["Ponder"] = UCIOption(true);
o["OwnBook"] = UCIOption(true);
o["MultiPV"] = UCIOption(1, 1, 500);
@@ -121,6 +121,9 @@ UCIOption::UCIOption(const char* v, Fn* f) : type("string"), min(0), max(0), idx
UCIOption::UCIOption(bool v, Fn* f) : type("check"), min(0), max(0), idx(Options.size()), on_change(f)
{ defaultValue = currentValue = (v ? "true" : "false"); }
UCIOption::UCIOption(Fn* f) : type("button"), min(0), max(0), idx(Options.size()), on_change(f)
{ defaultValue = currentValue = "false"; }
UCIOption::UCIOption(int v, int minv, int maxv, Fn* f) : type("spin"), min(minv), max(maxv), idx(Options.size()), on_change(f)
{ std::ostringstream ss; ss << v; defaultValue = currentValue = ss.str(); }
@@ -134,12 +137,15 @@ void UCIOption::operator=(const string& v) {
assert(!type.empty());
if ( !v.empty()
&& (type == "check") == (v == "true" || v == "false")
&& (type == "check" || type == "button") == (v == "true" || v == "false")
&& (type != "spin" || (atoi(v.c_str()) >= min && atoi(v.c_str()) <= max)))
{
currentValue = v;
if (on_change)
(*on_change)(*this);
if (type == "button")
currentValue = "false";
}
}