Function get_flock

block/src/fcntl.rs:176–184

Returns a [`struct@libc::flock`] structure for the whole file.

(lock_type: LockType, granularity: LockGranularity)

/// Returns a [`struct@libc::flock`] structure for the whole file.
const fn get_flock(lock_type: LockType, granularity: LockGranularity) -> libc::flock {
    libc::flock {
        l_type: lock_type.to_libc_val() as libc::c_short,
        l_whence: libc::SEEK_SET as libc::c_short,
        l_start: granularity.l_start() as libc::c_long,
        l_len: granularity.l_len() as libc::c_long,
        l_pid: 0, /* filled by callee */
    }
}

/// Tries to acquire a lock using [`fcntl`] with respect to the given
/// parameters.