Simplify from_fen()

[stockfish] / src / lock.h

diff --git a/src/lock.h b/src/lock.h
index 489a5663ab123071d5bb468d1301a620a33f3a5f..9bf59afadc8a8d4fc2949850fdcf6a32c1cbb1f8 100644 (file)
--- a/src/lock.h
+++ b/src/lock.h
@@ -33,10 +33,10 @@ typedef pthread_cond_t WaitCondition;
 #  define lock_grab(x) pthread_mutex_lock(x)
 #  define lock_release(x) pthread_mutex_unlock(x)
 #  define lock_destroy(x) pthread_mutex_destroy(x)
-#  define cond_destroy(x) pthread_cond_destroy(x);
-#  define cond_init(x) pthread_cond_init(x, NULL);
-#  define cond_signal(x) pthread_cond_signal(x);
-#  define cond_wait(x,y) pthread_cond_wait(x,y);
+#  define cond_destroy(x) pthread_cond_destroy(x)
+#  define cond_init(x) pthread_cond_init(x, NULL)
+#  define cond_signal(x) pthread_cond_signal(x)
+#  define cond_wait(x,y) pthread_cond_wait(x,y)
 
 #else
 
@@ -44,6 +44,9 @@ typedef pthread_cond_t WaitCondition;
 #include <windows.h>
 #undef WIN32_LEAN_AND_MEAN
 
+// Default fast and race free locks and condition variables
+#if !defined(OLD_LOCKS)
+
 typedef SRWLOCK Lock;
 typedef CONDITION_VARIABLE WaitCondition;
 
@@ -51,10 +54,27 @@ typedef CONDITION_VARIABLE WaitCondition;
 #  define lock_grab(x) AcquireSRWLockExclusive(x)
 #  define lock_release(x) ReleaseSRWLockExclusive(x)
 #  define lock_destroy(x) (x)
-#  define cond_destroy(x) (x);
-#  define cond_init(x) InitializeConditionVariable(x);
-#  define cond_signal(x) WakeConditionVariable(x);
-#  define cond_wait(x,y) SleepConditionVariableSRW(x, y, INFINITE,0);
+#  define cond_destroy(x) (x)
+#  define cond_init(x) InitializeConditionVariable(x)
+#  define cond_signal(x) WakeConditionVariable(x)
+#  define cond_wait(x,y) SleepConditionVariableSRW(x, y, INFINITE,0)
+
+// Fallback solution to build for Windows XP and older versions, note that
+// cond_wait() is racy between lock_release() and WaitForSingleObject().
+#else
+
+typedef CRITICAL_SECTION Lock;
+typedef HANDLE WaitCondition;
+
+#  define lock_init(x) InitializeCriticalSection(x)
+#  define lock_grab(x) EnterCriticalSection(x)
+#  define lock_release(x) LeaveCriticalSection(x)
+#  define lock_destroy(x) DeleteCriticalSection(x)
+#  define cond_init(x) { *x = CreateEvent(0, FALSE, FALSE, 0); }
+#  define cond_destroy(x) CloseHandle(*x)
+#  define cond_signal(x) SetEvent(*x)
+#  define cond_wait(x,y) { lock_release(y); WaitForSingleObject(*x, INFINITE); lock_grab(y); }
+#endif
 
 #endif