Fix compatibility with old Windows 95 and 98

[stockfish] / src / platform.h

diff --git a/src/platform.h b/src/platform.h
index ffa00a576a078a71f27c2673fbc75e0453c9f51e..50c1782c00c3b75e04762d3a8228e3e91a6f5350 100644 (file)
--- a/src/platform.h
+++ b/src/platform.h
@@ -92,6 +92,9 @@ typedef CRITICAL_SECTION Lock;
 typedef HANDLE WaitCondition;
 typedef HANDLE NativeHandle;
 
+// On Windows 95 and 98 parameter lpThreadId my not be null
+inline DWORD* dwWin9xKludge() { static DWORD dw; return &dw; }
+
 #  define lock_init(x) InitializeCriticalSection(&(x))
 #  define lock_grab(x) EnterCriticalSection(&(x))
 #  define lock_release(x) LeaveCriticalSection(&(x))
@@ -101,7 +104,7 @@ typedef HANDLE NativeHandle;
 #  define cond_signal(x) SetEvent(x)
 #  define cond_wait(x,y) { lock_release(y); WaitForSingleObject(x, INFINITE); lock_grab(y); }
 #  define cond_timedwait(x,y,z) { lock_release(y); WaitForSingleObject(x,z); lock_grab(y); }
-#  define thread_create(x,f,t) (x = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)f,t,0,NULL), x != NULL)
+#  define thread_create(x,f,t) (x = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)f,t,0,dwWin9xKludge()), x != NULL)
 #  define thread_join(x) { WaitForSingleObject(x, INFINITE); CloseHandle(x); }
 
 #endif