[fluksod] add wan and lan buffer coroutines

This commit is contained in:
Bart Van Der Meerssche 2011-01-30 17:21:31 +01:00
parent 99aee26dba
commit 17b8137e3d
1 changed files with 147 additions and 23 deletions

View File

@ -26,6 +26,7 @@ local dbg = require 'dbg'
local nixio = require 'nixio'
nixio.fs = require 'nixio.fs'
local uci = require 'luci.model.uci'.cursor()
local data = require 'flukso.data'
local arg = arg or {} -- needed when this code is not loaded via the interpreter
@ -44,43 +45,166 @@ local POLLIN = nixio.poll_flags('in')
-- parse and load /etc/config/flukso
local FLUKSO = uci:get_all('flukso')
local WAN_ENABLED = true
local WAN_INTERVAL = 300
local LAN_ENABLED = true
local TIMESTAMP_MIN = 1234567890
local delta = { fdin = nixio.open(DELTA_PATH_IN, O_RDWR_NONBLOCK),
function dispatch(wan_child, lan_child)
return coroutine.create(function()
local delta = { fdin = nixio.open(DELTA_PATH_IN, O_RDWR_NONBLOCK),
fdout = nixio.open(DELTA_PATH_OUT, O_RDWR) }
if delta.fdin == nil or delta.fdout == nil then
if delta.fdin == nil or delta.fdout == nil then
-- TODO output to syslog
print('Error. Unable to open the delta fifos.')
print('Exiting...')
os.exit(1)
end
end
-- TODO acquire an exclusive lock on the delta fifos or exit
-- TODO acquire an exclusive lock on the delta fifos or exit
function tolua(num)
local function tolua(num)
return num + 1
end
end
for line in delta.fdout:linesource() do
for line in delta.fdout:linesource() do
print(line)
timestamp, data = line:match('^(%d+)%s+([%d%s]+)$')
local timestamp, data = line:match('^(%d+)%s+([%d%s]+)$')
timestamp = tonumber(timestamp)
for i, counter, extra in data:gmatch('(%d+)%s+(%d+)%s+(%d+)') do
i = tonumber(i)
counter = tonumber(counter)
extra = tonumber(extra)
-- map index(+1!) to sensor id and sensor type
local sensor_id = FLUKSO[tostring(tolua(i))]['id']
local sensor_type = FLUKSO[tostring(tolua(i))]['type']
print(sensor_id, sensor_type, counter, extra)
-- resume both branches
if WAN_ENABLED then
coroutine.resume(wan_child, sensor_id, timestamp, counter)
end
if LAN_ENABLED then
if sensor_type == 'analog' then
coroutine.resume(lan_child, sensor_id, timestamp, extra)
elseif sensor_type == 'pulse' then
coroutine.resume(lan_child, sensor_id, timestamp, nil, counter, extra)
end
end
-- check in the e branch whether the counter has increased, if not then discard
-- chech in both branches whether timestamp has increased
-- or do we override??
end
end
end)
end
function wan_buffer(child)
return coroutine.create(function(sensor_id, timestamp, counter)
local measurements = data.new()
local threshold = timestamp + WAN_INTERVAL
local previous = {}
while true do
if not previous[sensor_id] then
previous[sensor_id] = {}
end
if timestamp > TIMESTAMP_MIN
and timestamp > (previous[sensor_id].timestamp or 0)
and counter > (previous[sensor_id].counter or 0)
then
measurements:add(sensor_id, timestamp, counter)
previous[sensor_id].timestamp = timestamp
previous[sensor_id].counter = counter
end
if timestamp > threshold and next(measurements) then --checking whether table is not empty
coroutine.resume(child, measurements)
threshold = timestamp + WAN_INTERVAL
end
sensor_id, timestamp, counter = coroutine.yield()
end
end)
end
function lan_buffer(child)
return coroutine.create(function(sensor_id, timestamp, power, counter, msec)
local measurements = data.new()
local previous = {}
local function diff(x, y) -- calculates y - x
if y >= x then
return y - x
else -- y wrapped around 32-bit boundary
return 4294967296 - x + y
end
end
while true do
if not previous[sensor_id] then
previous[sensor_id] = {}
end
if timestamp > TIMESTAMP_MIN and timestamp > (previous[sensor_id].timestamp or 0) then
if not power then -- we're dealing pulse message so first calculate power
if previous[sensor_id].msec and msec > prev[sensor_id].msec then
power = math.floor(diff(previous[sensor_id].counter, counter) /
diff(previous[sensor_id].msec, msec) * 3.6 * 10^6 + 0.5)
end
-- if msec decreased, just update the value in the table
-- but don't make any power calculations since the AVR might have gone through a reset
previous[sensor_id].msec = msec
previous[sensor_id].counter = counter
end
measurements:add(sensor_id, timestamp, power)
previous[sensor_id].timestamp = timestamp
end
if next(measurements) then --checking whether table is not empty
coroutine.resume(child, measurements)
end
sensor_id, timestamp, power, counter, msec = coroutine.yield()
end
end)
end
function debug(child)
return coroutine.create(function(measurements)
while true do
if DEBUG then
dbg.vardump(measurements)
end
if child then
coroutine.resume(child, measurements)
end
measurements = coroutine.yield()
end
end)
end
local wan_chain =
wan_buffer(
debug(nil)
)
local lan_chain =
lan_buffer(
debug(nil)
)
local chain = dispatch(wan_chain, lan_chain)
coroutine.resume(chain)