Avoid sending info strings before 'uci' has been received

[stockfish] / src / misc.cpp

diff --git a/src/misc.cpp b/src/misc.cpp
index b1c0feeb9e139b6b91476663d5a5987872746c0e..c625478462e3b29d417f41f0cc01d99218a9526c 100644 (file)
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -358,12 +358,21 @@ static void* aligned_ttmem_alloc_large_pages(size_t allocSize) {
 
 void* aligned_ttmem_alloc(size_t allocSize, void*& mem) {
 
+  static bool firstCall = true;
+
   // try to allocate large pages
   mem = aligned_ttmem_alloc_large_pages(allocSize);
-  if (mem)
-      sync_cout << "info string Hash table allocation: Windows large pages used." << sync_endl;
-  else
-      sync_cout << "info string Hash table allocation: Windows large pages not used." << sync_endl;
+
+  // Suppress info strings on the first call. The first call occurs before 'uci'
+  // is received and in that case this output confuses some GUIs.
+  if (!firstCall)
+  {
+      if (mem)
+          sync_cout << "info string Hash table allocation: Windows large pages used." << sync_endl;
+      else
+          sync_cout << "info string Hash table allocation: Windows large pages not used." << sync_endl;
+  }
+  firstCall = false;
 
   // fall back to regular, page aligned, allocation if necessary
   if (!mem)
@@ -390,7 +399,7 @@ void* aligned_ttmem_alloc(size_t allocSize, void*& mem) {
 
 void aligned_ttmem_free(void* mem) {
 
-  if (!VirtualFree(mem, 0, MEM_RELEASE))
+  if (mem && !VirtualFree(mem, 0, MEM_RELEASE))
   {
       DWORD err = GetLastError();
       std::cerr << "Failed to free transposition table. Error code: 0x" <<