nc 0.8.13

Access system calls directly
Documentation 
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/// System V semaphore operations
pub unsafe fn semtimedop(
    semid: i32,
    sops: &mut [sembuf_t],
    timeout: &timespec_t,
) -> Result<(), Errno> {
    let semid = semid as usize;
    let sops_ptr = sops.as_ptr() as usize;
    let nops = sops.len();
    let timeout_ptr = timeout as *const timespec_t as usize;
    syscall4(SYS_SEMTIMEDOP, semid, sops_ptr, nops, timeout_ptr).map(drop)
}