X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Flock.h;h=9bf59afadc8a8d4fc2949850fdcf6a32c1cbb1f8;hp=e25a223432be572bf1e07118e93100e0a058f8b5;hb=4fa0395eb8db33b23c2a91e4b255021fd940d811;hpb=65f8b6dbc0b4cdb6a27313bad5a1043edd16a779

diff --git a/src/lock.h b/src/lock.h
index e25a2234..9bf59afa 100644
--- a/src/lock.h
+++ b/src/lock.h
@@ -27,12 +27,16 @@
 #  include <pthread.h>
 
 typedef pthread_mutex_t Lock;
+typedef pthread_cond_t WaitCondition;
 
-#  define lock_init(x, y) pthread_mutex_init(x, y)
+#  define lock_init(x) pthread_mutex_init(x, NULL)
 #  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)
 
 #else
 
@@ -40,12 +44,37 @@ typedef pthread_mutex_t Lock;
 #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;
+
+#  define lock_init(x) InitializeSRWLock(x)
+#  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)
+
+// 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;
-#  define lock_init(x, y) InitializeCriticalSection(x)
+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