summaryrefslogtreecommitdiffhomepage
path: root/src/Plugins/Monitors/CpuFreq.hs
blob: 7e615a67b03c8417f723e552a8caeb834ce4b6a9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
-----------------------------------------------------------------------------
-- |
-- Module      :  Plugins.Monitors.CpuFreq
-- Copyright   :  (c) Juraj Hercek
-- License     :  BSD-style (see LICENSE)
--
-- Maintainer  :  Juraj Hercek <juhe_haskell@hck.sk>
-- Stability   :  unstable
-- Portability :  unportable
--
-- A cpu frequency monitor for Xmobar
--
-----------------------------------------------------------------------------

module Plugins.Monitors.CpuFreq where

import Plugins.Monitors.Common
import Plugins.Monitors.CoreCommon

-- |
-- Cpu frequency default configuration. Default template contains only
-- one core frequency, user should specify custom template in order to
-- get more cpu frequencies.
cpuFreqConfig :: IO MConfig
cpuFreqConfig =
  mkMConfig "Freq: <cpu0>" (map ((++) "cpu" . show) [0 :: Int ..])


-- |
-- Function retrieves monitor string holding the cpu frequency (or
-- frequencies)
runCpuFreq :: [String] -> Monitor String
runCpuFreq _ = do
  suffix <- getConfigValue useSuffix
  ddigits <- getConfigValue decDigits
  let path = ["/sys/devices/system/cpu/cpu", "/cpufreq/scaling_cur_freq"]
      divisor = 1e6 :: Double
      fmt x | x < 1 = if suffix then mhzFmt x ++ "MHz"
                                else ghzFmt x
            | otherwise = ghzFmt x ++ if suffix then "GHz" else ""
      mhzFmt x = show (round (x * 1000) :: Integer)
      ghzFmt x = showDigits ddigits x
  failureMessage <- getConfigValue naString
  checkedDataRetrieval failureMessage [path] Nothing (/divisor) fmt