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Increase max threads to 128

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Thanks to std::bitset we can easily increase
the limit of active threads above 64.

Thanks to Lucas Braesch for pointing at the
correct solution of using std::bitset.

No functional change.
This commit is contained in:
Marco Costalba
2014-03-18 12:07:26 +01:00
parent fa3f6dcbea
commit aab5863dd4
3 changed files with 15 additions and 17 deletions
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6
src/thread.cpp
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@@ -123,7 +123,7 @@ bool Thread::available_to(const Thread* master) const {
// No split points means that the thread is available as a slave for any
// other thread otherwise apply the "helpful master" concept if possible.
return !size || (splitPoints[size - 1].slavesMask & (1ULL << master->idx));
return !size || splitPoints[size - 1].slavesMask.test(master->idx);
}
@@ -271,7 +271,7 @@ void Thread::split(Position& pos, const Stack* ss, Value alpha, Value beta, Valu
sp.masterThread = this;
sp.parentSplitPoint = activeSplitPoint;
sp.slavesMask = 1ULL << idx;
sp.slavesMask = 0, sp.slavesMask.set(idx);
sp.depth = depth;
sp.bestValue = *bestValue;
sp.bestMove = *bestMove;
@@ -299,7 +299,7 @@ void Thread::split(Position& pos, const Stack* ss, Value alpha, Value beta, Valu
if (!Fake)
for (Thread* slave; (slave = Threads.available_slave(this)) != NULL; )
{
sp.slavesMask |= 1ULL << slave->idx;
sp.slavesMask.set(slave->idx);
slave->activeSplitPoint = &sp;
slave->searching = true; // Slave leaves idle_loop()
slave->notify_one(); // Could be sleeping