nc 0.9.7

Access system calls directly
Documentation 
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/// Lock a semaphore.
pub unsafe fn _ksem_timedwait(id: intptr_t, abstime: &timespec_t) -> Result<(), Errno> {
    let id = id as usize;
    let abstime_ptr = abstime as *const timespec_t as usize;
    syscall2(SYS__KSEM_TIMEDWAIT, id, abstime_ptr).map(drop)
}