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Call poll() before to check for stopped search

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Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2008-12-19 10:47:40 +01:00
parent 96d0501735
commit 2d0146fe1d
1 changed files with 23 additions and 19 deletions
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42
src/search.cpp
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@ -940,16 +940,17 @@ namespace {
assert(ply >= 0 && ply < PLY_MAX);
assert(threadID >= 0 && threadID < ActiveThreads);
// Initialize, and make an early exit in case of an aborted search,
// an instant draw, maximum ply reached, etc.
if (AbortSearch || thread_should_stop(threadID))
return Value(0);
if (depth < OnePly)
return qsearch(pos, ss, alpha, beta, Depth(0), ply, threadID);
// Initialize, and make an early exit in case of an aborted search,
// an instant draw, maximum ply reached, etc.
init_node(pos, ss, ply, threadID);
// After init_node() that calls poll()
if (AbortSearch || thread_should_stop(threadID))
return Value(0);
if (pos.is_draw())
return VALUE_DRAW;
@ -1132,21 +1133,22 @@ namespace {
assert(ply >= 0 && ply < PLY_MAX);
assert(threadID >= 0 && threadID < ActiveThreads);
EvalInfo ei;
// Initialize, and make an early exit in case of an aborted search,
// an instant draw, maximum ply reached, etc.
if (AbortSearch || thread_should_stop(threadID))
return Value(0);
if (depth < OnePly)
return qsearch(pos, ss, beta-1, beta, Depth(0), ply, threadID);
// Initialize, and make an early exit in case of an aborted search,
// an instant draw, maximum ply reached, etc.
init_node(pos, ss, ply, threadID);
// After init_node() that calls poll()
if (AbortSearch || thread_should_stop(threadID))
return Value(0);
if (pos.is_draw())
return VALUE_DRAW;
EvalInfo ei;
if (ply >= PLY_MAX - 1)
return evaluate(pos, ei, threadID);
@ -1189,8 +1191,8 @@ namespace {
Value nullValue = -search(pos, ss, -(beta-1), depth-R*OnePly, ply+1, false, threadID);
// Check for a null capture artifact, if the value without the null capture
// is above beta then there is a good possibility that this is a cut-node.
// We will do an IID later to find a ttMove.
// is above beta then mark the node as a suspicious failed low. We will verify
// later if we are really under threat.
if ( UseNullDrivenIID
&& nullValue < beta
&& depth > 6 * OnePly
@ -1256,7 +1258,9 @@ namespace {
{
// The null move failed low due to a suspicious capture. Perhaps we
// are facing a null capture artifact due to the side to move change
// and this is a cut-node. So it's a good time to search for a ttMove.
// and this position should fail high. So do a normal search with a
// reduced depth to get a good ttMove to use in the following full
// depth search.
Move tm = ss[ply].threatMove;
assert(tm != MOVE_NONE);
@ -1419,15 +1423,14 @@ namespace {
assert(ply >= 0 && ply < PLY_MAX);
assert(threadID >= 0 && threadID < ActiveThreads);
EvalInfo ei;
// Initialize, and make an early exit in case of an aborted search,
// an instant draw, maximum ply reached, etc.
init_node(pos, ss, ply, threadID);
// After init_node() that calls poll()
if (AbortSearch || thread_should_stop(threadID))
return Value(0);
init_node(pos, ss, ply, threadID);
if (pos.is_draw())
return VALUE_DRAW;
@ -1437,6 +1440,7 @@ namespace {
return value_from_tt(tte->value(), ply);
// Evaluate the position statically
EvalInfo ei;
bool isCheck = pos.is_check();
Value staticValue = (isCheck ? -VALUE_INFINITE : evaluate(pos, ei, threadID));