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authorMichal Zielonka <michal.zielonka.8001@gmail.com>2022-04-11 22:53:29 +0200
committerMichal Zielonka <michal.zielonka.8001@gmail.com>2022-04-11 22:53:29 +0200
commit15dccb714af16c786ebb63cf619f885495781f5f (patch)
treee2f1f8fb8511ee35ddf6f42a974fc9aba7966b31 /src/Xmobar/Plugins/Monitors/Load/FreeBSD.hsc
parent7af1ddc5ebbe9d651ffbc057614be18637e69939 (diff)
downloadxmobar-15dccb714af16c786ebb63cf619f885495781f5f.tar.gz
xmobar-15dccb714af16c786ebb63cf619f885495781f5f.tar.bz2
add load monitor for freebsd
Diffstat (limited to 'src/Xmobar/Plugins/Monitors/Load/FreeBSD.hsc')
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+{-# 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)