+++ /dev/null
--- Copyright (c) 2011, 2014. The SimGrid Team.
--- All rights reserved.
-
--- This program is free software; you can redistribute it and/or modify it
--- under the terms of the license (GNU LGPL) which comes with this package.
-
-dofile "sim_splay.lua"
-between, call, thread, ping = misc.between_c, rpc.call, events.thread, rpc.ping
-n, predecessor, finger, timeout, m = {}, nil, {}, 5, 24
-function join(n0) -- n0: some node in the ring
- simgrid.info("Euh...")
- predecessor = nil
- finger[1] = call(n0, {'find_successor', n.id})
- simgrid.info("8Here..")
- call(finger[1], {'notify', n})
-end
-
-function closest_preceding_node(id)
- for i = m, 1, -1 do
- if finger[i] and between(finger[i].id, n.id, id) then
- return finger[i]
- end
- end
- return n
-end
-
-function find_successor(id)
- if finger[1].id == n.id or between(id, n.id, (finger[1].id + 1) % 2^m) then
- return finger[1]
- else
- local n0 = closest_preceding_node(id)
- return call(n0, {'find_successor', id})
- end
-end
-function stabilize()
- local x = call(finger[1], 'predecessor')
- if x and between(x.id, n.id, finger[1].id) then
- finger[1] = x -- new successor
- call(finger[1], {'notify', n})
- end
-end
-function notify(n0)
- if n0.id ~= n.id and
- (not predecessor or between(n0.id, predecessor.id, n.id)) then
- predecessor = n0
- end
-end
-function fix_fingers()
- refresh = (refresh and (refresh % m) + 1) or 1 -- 1 <= next <= m
- finger[refresh] = find_successor((n.id + 2^(refresh - 1)) % 2^m)
-end
-function check_predecessor()
- if predecessor and not rpc.ping(predecessor) then
- predecessor = nil
- end
-end
-
-n.id = math.random(1, 2^m)
-finger[1] = n
-if job then
- n.ip, n.port = job.me.ip, job.me.port
- join({ip = "192.42.43.42", port = 20000})
-else
- simgrid.info("bizzaaaaaar...")
- n.ip, n.port = "127.0.0.1", 20000
- if arg[1] then n.ip = arg[1] end
- if arg[2] then n.port = tonumber(arg[2]) end
- if not arg[3] then
- print("RDV")
- else
- print("JOIN")
- thread(function() join({ip = arg[3], port = tonumber(arg[4])}) end)
- end
-end
-rpc.server(n.port)
-events.periodic(stabilize, timeout)
-events.periodic(check_predecessor, timeout)
-events.periodic(fix_fingers, timeout)
-events.loop()
