Browse Source

examples/lua: attempt to highlight some traps

Ran into some issues with my fd event being garbage collected.  As I
never wanted to call :delete, I had seen no reason to keep the returned
object, as my callback and upvalues were still valid.

Signed-off-by: Karl Palsson <karlp@etactica.com>
master
Karl Palsson 11 months ago
committed by Petr Štetiar
parent
commit
f4e9bf73ac
1 changed files with 5 additions and 3 deletions
  1. +5
    -3
      examples/uloop-example.lua

+ 5
- 3
examples/uloop-example.lua View File

@ -9,7 +9,7 @@ local udp = socket.udp()
udp:settimeout(0)
udp:setsockname('*', 8080)
-- timer example 1
-- timer example 1 (will run repeatedly)
local timer
function t()
print("1000 ms timer run");
@ -18,10 +18,10 @@ end
timer = uloop.timer(t)
timer:set(1000)
-- timer example 2
-- timer example 2 (will run once)
uloop.timer(function() print("2000 ms timer run"); end, 2000)
-- timer example 3
-- timer example 3 (will never run)
uloop.timer(function() print("3000 ms timer run"); end, 3000):cancel()
-- process
@ -46,6 +46,8 @@ uloop.timer(
end, 2000
)
-- Keep udp_ev reference, events will be gc'd, even if the callback is still referenced
-- .delete will manually untrack.
udp_ev = uloop.fd_add(udp, function(ufd, events)
local words, msg_or_ip, port_or_nil = ufd:receivefrom()
print('Recv UDP packet from '..msg_or_ip..':'..port_or_nil..' : '..words)


Loading…
Cancel
Save