X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fthread.cpp;h=2c40ef6f8c14ecc7ccc218a01d06dada354d8874;hp=4c582e08d54645933dd2b8bd627938259faa2f5f;hb=3d937e1e901c59c04cd5d602c05f72892222ded8;hpb=8307da0de77c9c7bbf7c56a7d9c8a688ff4dfb4e

diff --git a/src/thread.cpp b/src/thread.cpp
index 4c582e08..2c40ef6f 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -17,8 +17,10 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <cassert>
 #include <iostream>
 
+#include "movegen.h"
 #include "search.h"
 #include "thread.h"
 #include "ucioption.h"
@@ -62,9 +64,9 @@ namespace { extern "C" {
 
 void Thread::wake_up() {
 
-  lock_grab(&sleepLock);
-  cond_signal(&sleepCond);
-  lock_release(&sleepLock);
+  lock_grab(sleepLock);
+  cond_signal(sleepCond);
+  lock_release(sleepLock);
 }
 
 
@@ -151,17 +153,17 @@ void ThreadsManager::set_size(int cnt) {
 void ThreadsManager::init() {
 
   // Initialize sleep condition and lock used by thread manager
-  cond_init(&sleepCond);
-  lock_init(&threadsLock);
+  cond_init(sleepCond);
+  lock_init(threadsLock);
 
   // Initialize thread's sleep conditions and split point locks
   for (int i = 0; i <= MAX_THREADS; i++)
   {
-      lock_init(&threads[i].sleepLock);
-      cond_init(&threads[i].sleepCond);
+      lock_init(threads[i].sleepLock);
+      cond_init(threads[i].sleepCond);
 
       for (int j = 0; j < MAX_ACTIVE_SPLIT_POINTS; j++)
-          lock_init(&(threads[i].splitPoints[j].lock));
+          lock_init(threads[i].splitPoints[j].lock);
   }
 
   // Allocate main thread tables to call evaluate() also when not searching
@@ -172,15 +174,10 @@ void ThreadsManager::init() {
   for (int i = 0; i <= MAX_THREADS; i++)
   {
       threads[i].is_searching = false;
-      threads[i].do_sleep = true;
+      threads[i].do_sleep = (i != 0); // Avoid a race with start_thinking()
       threads[i].threadID = i;
 
-#if defined(_MSC_VER)
-      threads[i].handle = CreateThread(NULL, 0, start_routine, (LPVOID)&threads[i], 0, NULL);
-      bool ok = (threads[i].handle != NULL);
-#else
-      bool ok = !pthread_create(&threads[i].handle, NULL, start_routine, (void*)&threads[i]);
-#endif
+      bool ok = thread_create(threads[i].handle, start_routine, threads[i]);
 
       if (!ok)
       {
@@ -200,24 +197,18 @@ void ThreadsManager::exit() {
       threads[i].do_terminate = true; // Search must be already finished
       threads[i].wake_up();
 
-      // Wait for thread termination
-#if defined(_MSC_VER)
-      WaitForSingleObject(threads[i].handle, 0);
-      CloseHandle(threads[i].handle);
-#else
-      pthread_join(threads[i].handle, NULL);
-#endif
+      thread_join(threads[i].handle); // Wait for thread termination
 
       // Now we can safely destroy associated locks and wait conditions
-      lock_destroy(&threads[i].sleepLock);
-      cond_destroy(&threads[i].sleepCond);
+      lock_destroy(threads[i].sleepLock);
+      cond_destroy(threads[i].sleepCond);
 
       for (int j = 0; j < MAX_ACTIVE_SPLIT_POINTS; j++)
-          lock_destroy(&(threads[i].splitPoints[j].lock));
+          lock_destroy(threads[i].splitPoints[j].lock);
   }
 
-  lock_destroy(&threadsLock);
-  cond_destroy(&sleepCond);
+  lock_destroy(threadsLock);
+  cond_destroy(sleepCond);
 }
 
 
@@ -308,7 +299,7 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
   // Try to allocate available threads and ask them to start searching setting
   // is_searching flag. This must be done under lock protection to avoid concurrent
   // allocation of the same slave by another master.
-  lock_grab(&threadsLock);
+  lock_grab(threadsLock);
 
   for (i = 0; !Fake && i < activeThreads && workersCnt < maxThreadsPerSplitPoint; i++)
       if (threads[i].is_available_to(master))
@@ -324,7 +315,7 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
               threads[i].wake_up();
       }
 
-  lock_release(&threadsLock);
+  lock_release(threadsLock);
 
   // We failed to allocate even one slave, return
   if (!Fake && workersCnt == 1)
@@ -347,12 +338,12 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
   // We have returned from the idle loop, which means that all threads are
   // finished. Note that changing state and decreasing activeSplitPoints is done
   // under lock protection to avoid a race with Thread::is_available_to().
-  lock_grab(&threadsLock);
+  lock_grab(threadsLock);
 
   masterThread.is_searching = true;
   masterThread.activeSplitPoints--;
 
-  lock_release(&threadsLock);
+  lock_release(threadsLock);
 
   masterThread.splitPoint = sp->parent;
   pos.set_nodes_searched(pos.nodes_searched() + sp->nodes);
@@ -367,16 +358,16 @@ template Value ThreadsManager::split<true>(Position&, Stack*, Value, Value, Valu
 
 // Thread::timer_loop() is where the timer thread waits maxPly milliseconds and
 // then calls do_timer_event(). If maxPly is 0 thread sleeps until is woken up.
-extern void do_timer_event();
+extern void check_time();
 
 void Thread::timer_loop() {
 
   while (!do_terminate)
   {
-      lock_grab(&sleepLock);
-      timed_wait(&sleepCond, &sleepLock, maxPly ? maxPly : INT_MAX);
-      lock_release(&sleepLock);
-      do_timer_event();
+      lock_grab(sleepLock);
+      timed_wait(sleepCond, sleepLock, maxPly ? maxPly : INT_MAX);
+      lock_release(sleepLock);
+      check_time();
   }
 }
 
@@ -388,10 +379,10 @@ void ThreadsManager::set_timer(int msec) {
 
   Thread& timer = threads[MAX_THREADS];
 
-  lock_grab(&timer.sleepLock);
+  lock_grab(timer.sleepLock);
   timer.maxPly = msec;
-  cond_signal(&timer.sleepCond); // Wake up and restart the timer
-  lock_release(&timer.sleepLock);
+  cond_signal(timer.sleepCond); // Wake up and restart the timer
+  lock_release(timer.sleepLock);
 }
 
 
@@ -402,25 +393,25 @@ void Thread::main_loop() {
 
   while (true)
   {
-      lock_grab(&sleepLock);
+      lock_grab(sleepLock);
 
       do_sleep = true; // Always return to sleep after a search
       is_searching = false;
 
       while (do_sleep && !do_terminate)
       {
-          cond_signal(&Threads.sleepCond); // Wake up UI thread if needed
-          cond_wait(&sleepCond, &sleepLock);
+          cond_signal(Threads.sleepCond); // Wake up UI thread if needed
+          cond_wait(sleepCond, sleepLock);
       }
 
       is_searching = true;
 
-      lock_release(&sleepLock);
+      lock_release(sleepLock);
 
       if (do_terminate)
           return;
 
-      think(); // This is the search entry point
+      Search::think();
   }
 }
 
@@ -431,30 +422,38 @@ void Thread::main_loop() {
 // the search to finish.
 
 void ThreadsManager::start_thinking(const Position& pos, const LimitsType& limits,
-                                    const std::vector<Move>& searchMoves, bool asyncMode) {
+                                    const std::set<Move>& searchMoves, bool async) {
   Thread& main = threads[0];
 
-  lock_grab(&main.sleepLock);
+  lock_grab(main.sleepLock);
 
   // Wait main thread has finished before to launch a new search
   while (!main.do_sleep)
-      cond_wait(&sleepCond, &main.sleepLock);
+      cond_wait(sleepCond, main.sleepLock);
 
   // Copy input arguments to initialize the search
   RootPosition.copy(pos, 0);
   Limits = limits;
-  SearchMoves = searchMoves;
+  RootMoves.clear();
+
+  // Populate RootMoves with all the legal moves (default) or, if a searchMoves
+  // set is given, with the subset of legal moves to search.
+  for (MoveList<MV_LEGAL> ml(pos); !ml.end(); ++ml)
+      if (searchMoves.empty() || searchMoves.count(ml.move()))
+          RootMoves.push_back(RootMove(ml.move()));
 
   // Reset signals before to start the new search
-  memset((void*)&Signals, 0, sizeof(Signals));
+  Signals.stopOnPonderhit = Signals.firstRootMove = false;
+  Signals.stop = Signals.failedLowAtRoot = false;
 
   main.do_sleep = false;
-  cond_signal(&main.sleepCond); // Wake up main thread and start searching
+  cond_signal(main.sleepCond); // Wake up main thread and start searching
 
-  if (!asyncMode)
-      cond_wait(&sleepCond, &main.sleepLock);
+  if (!async)
+      while (!main.do_sleep)
+          cond_wait(sleepCond, main.sleepLock);
 
-  lock_release(&main.sleepLock);
+  lock_release(main.sleepLock);
 }
 
 
@@ -468,14 +467,14 @@ void ThreadsManager::stop_thinking() {
 
   Search::Signals.stop = true;
 
-  lock_grab(&main.sleepLock);
+  lock_grab(main.sleepLock);
 
-  cond_signal(&main.sleepCond); // In case is waiting for stop or ponderhit
+  cond_signal(main.sleepCond); // In case is waiting for stop or ponderhit
 
   while (!main.do_sleep)
-      cond_wait(&sleepCond, &main.sleepLock);
+      cond_wait(sleepCond, main.sleepLock);
 
-  lock_release(&main.sleepLock);
+  lock_release(main.sleepLock);
 }
 
 
@@ -492,10 +491,10 @@ void ThreadsManager::wait_for_stop_or_ponderhit() {
 
   Thread& main = threads[0];
 
-  lock_grab(&main.sleepLock);
+  lock_grab(main.sleepLock);
 
   while (!Signals.stop)
-      cond_wait(&main.sleepCond, &main.sleepLock);
+      cond_wait(main.sleepCond, main.sleepLock);
 
-  lock_release(&main.sleepLock);
+  lock_release(main.sleepLock);
 }