-# 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