*/
#if defined(_POSIX_TIMEOUTS) && (_POSIX_TIMEOUTS - 200112L) >= 0L
int mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts)
*/
#if defined(_POSIX_TIMEOUTS) && (_POSIX_TIMEOUTS - 200112L) >= 0L
int mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts)