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--
-- TIMER.LUA
--
-- Sample program for Lua Lanes
--
-- On MSYS, stderr is buffered. In this test it matters.
io.stderr:setvbuf "no"
local lanes = require "lanes".configure{with_timers=true}
local linda= lanes.linda()
local function PRINT(str)
io.stderr:write(str.."\n")
end
local T1= "1s" -- these keys can be anything...
local T2= "5s"
local PING_DURATION = 20
local step= {}
lanes.timer( linda, T1, 1.0, 1.0 )
step[T1]= 1.0
PRINT( "\n*** Starting 1s Timer (not synced to wall clock) ***\n" )
local v_first
local v_last= {} -- { [channel]= num }
local T2_first_round= true
local caught= {} -- { [T1]= bool, [T2]= bool }
while true do
io.stderr:write("waiting...\t")
local channel, v = linda:receive( 6.0, T1,T2 )
assert( channel==T1 or channel==T2 )
caught[channel]= true
io.stderr:write( ((channel==T1) and "" or "\t\t").. string.format("%.3f",v),"\n" )
assert( type(v)=="number" )
if v_last[channel] then
if channel==T2 and T2_first_round then
-- do not make measurements, first round is not 5secs due to wall clock adjustment
T2_first_round= false
else
local dt = math.abs(v-v_last[channel]- step[channel])
assert( dt < 0.02, "channel " .. channel .. " is late: " .. dt)
end
end
if not v_first then
v_first= v
elseif v-v_first > 3.0 and (not step[T2]) then
PRINT( "\n*** Starting 5s timer (synced to wall clock) ***\n" )
-- The first event can be in the past (just cut seconds down to 5s)
--
local date= os.date("*t")
date.sec = date.sec - date.sec%5
lanes.timer( linda, T2, date, 5.0 )
step[T2]= 5.0
elseif v-v_first > PING_DURATION then -- exit condition
break
end
v_last[channel]= v
end
-- Windows version had a bug where T2 timers were not coming through, at all.
-- AKa 24-Jan-2009
--
assert( caught[T1] )
assert( caught[T2] )
PRINT( "\n*** Listing timers ***\n" )
local r = lanes.timers() -- list of {linda, key, {}}
for _,t in ipairs( r) do
local linda, key, timer = t[1], t[2], t[3]
print( tostring( linda), key, timer[1], timer[2])
end
PRINT( "\n*** Clearing timers ***\n" )
lanes.timer( linda, T1, 0 ) -- reset; no reoccuring ticks
lanes.timer( linda, T2, 0 )
linda:receive( 0, T1 ) -- clear out; there could be one tick left
linda:receive( 0, T2 )
local _count, _val = linda:get(T1)
assert(_count == 0 and _val == nil)
local _count, _val = linda:get(T2)
assert(_count == 0 and _val == nil)
PRINT "...making sure no ticks are coming..."
local k,v= linda:receive( 10, T1,T2 ) -- should not get any
assert(k==nil and v == "timeout")
lanes.timer_lane:cancel() -- hard cancel, 0 timeout
print (lanes.timer_lane[1], lanes.timer_lane[2])
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