339     if (!cond) return thrd_error;  in cnd_broadcast()
366     if (!cond) return thrd_error;  in cnd_init()
384     if (!cond) return thrd_error;  in cnd_signal()
397     if (!cond || !mtx || !abs_time) return thrd_error;  in cnd_timedwait()
401     return (GetLastError() == ERROR_TIMEOUT) ? thrd_busy : thrd_error;  in cnd_timedwait()
411     if (!cond || !mtx) return thrd_error;  in cnd_wait()
434     if (!mtx) return thrd_error;  in mtx_init()
439         return thrd_error;  in mtx_init()
448     if (!mtx) return thrd_error;  in mtx_lock()
458     if (!mtx || !ts) return thrd_error;  in mtx_timedlock()
475     if (!mtx) return thrd_error;  in mtx_trylock()
483     if (!mtx) return thrd_error;  in mtx_unlock()
496     if (!thr) return thrd_error;  in thrd_create()
505         return thrd_error;  in thrd_create()
582         return thrd_error;  in thrd_join()
586             return thrd_error;  in thrd_join()
616     if (!key) return thrd_error;  in tss_create()
621             return thrd_error;  in tss_create()
624     return (*key != 0xFFFFFFFF) ? thrd_success : thrd_error;  in tss_create()
645     return TlsSetValue(key, val) ? thrd_success : thrd_error;  in tss_set()