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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"
require "lanes"
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 step= {}
lanes.timer( linda, T1, 1.0, 1.0 )
step[T1]= 1.0
PRINT( "\n*** Timers every second (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 v,channel= 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
assert( math.abs(v-v_last[channel]- step[channel]) < 0.02 )
end
end
if not v_first then
v_first= v
elseif v-v_first > 3.0 and (not step[T2]) then
PRINT( "\n*** Adding timers every 5 second (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 > 10 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*** 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 )
assert( linda:get(T1) == nil )
assert( linda:get(T2) == nil )
PRINT "...making sure no ticks are coming..."
local v= linda:receive( 1.5, T1,T2 ) -- should not get any
assert(v==nil)
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