Slightly change split() API

[stockfish] / src / thread.cpp

diff --git a/src/thread.cpp b/src/thread.cpp
index 12a9527131b6f73bbb8f46a7b8cb6a219f2e994b..b04b8adbb1719e586e818e366b2077fdc01053ab 100644 (file)
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -186,7 +186,7 @@ void ThreadPool::init() {
 
   sleepWhileIdle = true;
   timer = new TimerThread();
-  threads.push_back(new MainThread());
+  push_back(new MainThread());
   read_uci_options();
 }
 
@@ -197,8 +197,8 @@ void ThreadPool::exit() {
 
   delete timer; // As first because check_time() accesses threads data
 
-  for (size_t i = 0; i < threads.size(); i++)
-      delete threads[i];
+  for (iterator it = begin(); it != end(); ++it)
+      delete *it;
 }
 
 
@@ -215,13 +215,13 @@ void ThreadPool::read_uci_options() {
 
   assert(requested > 0);
 
-  while (threads.size() < requested)
-      threads.push_back(new Thread());
+  while (size() < requested)
+      push_back(new Thread());
 
-  while (threads.size() > requested)
+  while (size() > requested)
   {
-      delete threads.back();
-      threads.pop_back();
+      delete back();
+      pop_back();
   }
 }
 
@@ -231,8 +231,8 @@ void ThreadPool::read_uci_options() {
 
 bool ThreadPool::slave_available(Thread* master) const {
 
-  for (size_t i = 0; i < threads.size(); i++)
-      if (threads[i]->is_available_to(master))
+  for (const_iterator it = begin(); it != end(); ++it)
+      if ((*it)->is_available_to(master))
           return true;
 
   return false;
@@ -249,15 +249,14 @@ bool ThreadPool::slave_available(Thread* master) const {
 // search() then split() returns.
 
 template <bool Fake>
-Value Thread::split(Position& pos, Stack* ss, Value alpha, Value beta,
-                    Value bestValue, Move* bestMove, Depth depth, Move threatMove,
-                    int moveCount, MovePicker& mp, int nodeType) {
+void Thread::split(Position& pos, Stack* ss, Value alpha, Value beta, Value* bestValue,
+                   Move* bestMove, Depth depth, Move threatMove, int moveCount,
+                   MovePicker* movePicker, int nodeType) {
 
   assert(pos.pos_is_ok());
-  assert(bestValue <= alpha && alpha < beta && beta <= VALUE_INFINITE);
-  assert(bestValue > -VALUE_INFINITE);
+  assert(*bestValue <= alpha && alpha < beta && beta <= VALUE_INFINITE);
+  assert(*bestValue > -VALUE_INFINITE);
   assert(depth >= Threads.minimumSplitDepth);
-
   assert(searching);
   assert(splitPointsSize < MAX_SPLITPOINTS_PER_THREAD);
 
@@ -268,13 +267,13 @@ Value Thread::split(Position& pos, Stack* ss, Value alpha, Value beta,
   sp.parentSplitPoint = activeSplitPoint;
   sp.slavesMask = 1ULL << idx;
   sp.depth = depth;
+  sp.bestValue = *bestValue;
   sp.bestMove = *bestMove;
   sp.threatMove = threatMove;
   sp.alpha = alpha;
   sp.beta = beta;
   sp.nodeType = nodeType;
-  sp.bestValue = bestValue;
-  sp.movePicker = &mp;
+  sp.movePicker = movePicker;
   sp.moveCount = moveCount;
   sp.pos = &pos;
   sp.nodes = 0;
@@ -290,16 +289,20 @@ Value Thread::split(Position& pos, Stack* ss, Value alpha, Value beta,
   splitPointsSize++;
   activeSplitPoint = &sp;
 
-  size_t slavesCnt = 1; // Master is always included
+  size_t slavesCnt = 1; // This thread is always included
+
+  for (ThreadPool::iterator it = Threads.begin(); it != Threads.end() && !Fake; ++it)
+  {
+      Thread* slave = *it;
 
-  for (size_t i = 0; i < Threads.size() && !Fake; ++i)
-      if (Threads[i].is_available_to(this) && ++slavesCnt <= Threads.maxThreadsPerSplitPoint)
+      if (slave->is_available_to(this) && ++slavesCnt <= Threads.maxThreadsPerSplitPoint)
       {
-          sp.slavesMask |= 1ULL << Threads[i].idx;
-          Threads[i].activeSplitPoint = &sp;
-          Threads[i].searching = true; // Slave leaves idle_loop()
-          Threads[i].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();
   Threads.mutex.unlock();
@@ -328,16 +331,15 @@ Value Thread::split(Position& pos, Stack* ss, Value alpha, Value beta,
   activeSplitPoint = sp.parentSplitPoint;
   pos.set_nodes_searched(pos.nodes_searched() + sp.nodes);
   *bestMove = sp.bestMove;
+  *bestValue = sp.bestValue;
 
   sp.mutex.unlock();
   Threads.mutex.unlock();
-
-  return sp.bestValue;
 }
 
 // Explicit template instantiations
-template Value Thread::split<false>(Position&, Stack*, Value, Value, Value, Move*, Depth, Move, int, MovePicker&, int);
-template Value Thread::split<true>(Position&, Stack*, Value, Value, Value, Move*, Depth, Move, int, MovePicker&, int);
+template void Thread::split<false>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int);
+template void Thread::split< true>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int);
 
 
 // wait_for_think_finished() waits for main thread to go to sleep then returns