-
-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);
+#undef NOMINMAX
+
+// We use critical sections on Windows to support Windows XP and older versions,
+// unfortunatly cond_wait() is racy between lock_release() and WaitForSingleObject()
+// but apart from this they have the same speed performance of SRW locks.
+typedef CRITICAL_SECTION Lock;
+typedef HANDLE WaitCondition;
+typedef HANDLE ThreadHandle;
+
+# 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); }
+# define cond_timedwait(x,y,z) { lock_release(y); WaitForSingleObject(x,z); lock_grab(y); }
+# define thread_create(x,f,id) (x = CreateThread(NULL,0,f,&(id),0,NULL), x != NULL)
+# define thread_join(x) { WaitForSingleObject(x, INFINITE); CloseHandle(x); }