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#288 trying metatables
[etc/awesome.git] / widgets / mem.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2010-2012, Peter Hofmann              
7                                                   
8 --]]
9
10 local helpers      = require("lain.helpers")
11 local wibox        = require("wibox")
12 local gmatch       = string.gmatch
13 local lines        = io.lines
14 local floor        = math.floor
15 local setmetatable = setmetatable
16
17 -- Memory usage (ignoring caches)
18 -- lain.widgets.mem
19 local mem = helpers.make_widget_textbox()
20
21 local function worker(args)
22     local args     = args or {}
23     local timeout  = args.timeout or 2
24     local settings = args.settings or function() end
25
26     function update()
27         mem_now = {}
28         for line in lines("/proc/meminfo") do
29             for k, v in gmatch(line, "([%a]+):[%s]+([%d]+).+") do
30                 if     k == "MemTotal"     then mem_now.total = floor(v / 1024 + 0.5)
31                 elseif k == "MemFree"      then mem_now.free  = floor(v / 1024 + 0.5)
32                 elseif k == "Buffers"      then mem_now.buf   = floor(v / 1024 + 0.5)
33                 elseif k == "Cached"       then mem_now.cache = floor(v / 1024 + 0.5)
34                 elseif k == "SwapTotal"    then mem_now.swap  = floor(v / 1024 + 0.5)
35                 elseif k == "SwapFree"     then mem_now.swapf = floor(v / 1024 + 0.5)
36                 elseif k == "SReclaimable" then mem_now.srec  = floor(v / 1024 + 0.5)
37                 end
38             end
39         end
40
41         mem_now.used = mem_now.total - mem_now.free - mem_now.buf - mem_now.cache - mem_now.srec
42         mem_now.swapused = mem_now.swap - mem_now.swapf
43         mem_now.perc = math.floor(mem_now.used / mem_now.total * 100)
44
45         widget = mem.widget
46         settings()
47     end
48
49     helpers.newtimer("mem", timeout, update)
50
51     return mem
52 end
53
54 return setmetatable(mem, { __call = function(_, ...) return worker(...) end })