blob: bde7e919d6cf4ff214031253ff7919bcc7b8026e (
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE CApiFFI #-}
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Load.FreeBSD
-- Copyright : Finn Lawler
-- License : BSD-style (see LICENSE)
--
-- Author : Finn Lawler <flawler@cs.tcd.ie>
-- Maintainer : jao <mail@jao.io>
-- Stability : unstable
-- Portability : unportable
--
-- A load average monitor for Xmobar. Adapted from
-- Xmobar.Plugins.Monitors.Thermal by Juraj Hercek.
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.Monitors.Load.FreeBSD (fetchLoads) where
import Xmobar.Plugins.Monitors.Load.Common (Result(..))
import Foreign.C.Types (CUInt, CUIntMax)
import Foreign.Marshal.Array (peekArray)
import Foreign.Ptr (plusPtr)
import Foreign.Storable (Storable, alignment, peek, peekByteOff, poke, sizeOf)
import System.BSD.Sysctl (sysctlPeek)
#include <sys/resource.h>
data LoadAvg = LoadAvg {loads :: [Float]}
calcLoad :: CUInt -> CUIntMax -> Float
calcLoad l s = ((fromIntegral . toInteger) l) / ((fromIntegral . toInteger) s)
instance Storable LoadAvg where
alignment _ = #{alignment struct loadavg}
sizeOf _ = #{size struct loadavg}
peek ptr = do
load_values <- peekArray 3 $ #{ptr struct loadavg, ldavg} ptr :: IO [CUInt]
scale <- #{peek struct loadavg, fscale} ptr :: IO CUIntMax
let
l1 = calcLoad (load_values !! 0) scale
l5 = calcLoad (load_values !! 1) scale
l15 = calcLoad (load_values !! 2) scale
return $ LoadAvg{loads = [l1, l5, l15]}
poke _ _ = pure ()
fetchLoads :: IO Result
fetchLoads = do
res <- sysctlPeek "vm.loadavg" :: IO LoadAvg
return $ Result (loads res)
|
