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Change slave_available() API

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To return a pointer to the available
thread instead of a bool. This allows
to simplify the core loop in split().

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2013-02-06 09:36:13 +01:00
parent 88c3670edf
commit 14c2c1395b
3 changed files with 12 additions and 15 deletions
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23
src/thread.cpp
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@@ -229,13 +229,13 @@ void ThreadPool::read_uci_options() {
// slave_available() tries to find an idle thread which is available as a slave
// for the thread 'master'.
bool ThreadPool::slave_available(Thread* master) const {
Thread* ThreadPool::available_slave(Thread* master) const {
for (const_iterator it = begin(); it != end(); ++it)
if ((*it)->is_available_to(master))
return true;
return *it;
return false;
return NULL;
}
@@ -290,18 +290,15 @@ void Thread::split(Position& pos, Stack* ss, Value alpha, Value beta, Value* bes
activeSplitPoint = &sp;
size_t slavesCnt = 1; // This thread is always included
Thread* slave;
for (ThreadPool::iterator it = Threads.begin(); it != Threads.end() && !Fake; ++it)
while ( (slave = Threads.available_slave(this)) != NULL
&& ++slavesCnt <= Threads.maxThreadsPerSplitPoint && !Fake)
{
Thread* slave = *it;
if (slave->is_available_to(this) && ++slavesCnt <= Threads.maxThreadsPerSplitPoint)
{
sp.slavesMask |= 1ULL << slave->idx;
slave->activeSplitPoint = &sp;
slave->searching = true; // Slave leaves idle_loop()
slave->notify_one(); // Could be sleeping
}
sp.slavesMask |= 1ULL << slave->idx;
slave->activeSplitPoint = &sp;
slave->searching = true; // Slave leaves idle_loop()
slave->notify_one(); // Could be sleeping
}
sp.mutex.unlock();