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wiki updated
[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
13 local io           = { lines  = io.lines }
14 local math         = { floor  = math.floor }
15 local string       = { gmatch = string.gmatch }
16
17 local setmetatable = setmetatable
18
19 -- Memory usage
20 -- lain.widgets.mem
21 local mem = {}
22
23 local function worker(args)
24     local args     = args or {}
25     local timeout  = args.timeout or 1
26     local settings = args.settings or function() end
27
28     mem.widget = wibox.widget.textbox('')
29
30     helpers.set_map("mem_last_total", 0)
31     helpers.set_map("mem_last_free", 0)
32     helpers.set_map("mem_last_buf", 0)
33     helpers.set_map("mem_last_cache", 0)
34     helpers.set_map("mem_last_swap", 0)
35     helpers.set_map("mem_last_swapf", 0)
36
37     function update()
38         mem_now = {}
39         for line in io.lines("/proc/meminfo")
40         do
41             for k, v in string.gmatch(line, "([%a]+):[%s]+([%d]+).+")
42             do
43                 if     k == "MemTotal"  then mem_now.total = math.floor(v / 1024)
44                 elseif k == "MemFree"   then mem_now.free  = math.floor(v / 1024)
45                 elseif k == "Buffers"   then mem_now.buf   = math.floor(v / 1024)
46                 elseif k == "Cached"    then mem_now.cache = math.floor(v / 1024)
47                 elseif k == "SwapTotal" then mem_now.swap  = math.floor(v / 1024)
48                 elseif k == "SwapFree"  then mem_now.swapf = math.floor(v / 1024)
49                 end
50             end
51         end
52
53         if mem_now.total ~= helpers.set_map("mem_last_total")
54         or mem_now.free  ~= helpers.set_map("mem_last_free")
55         or mem_now.buf   ~= helpers.set_map("mem_last_buf")
56         or mem_now.cache ~= helpers.set_map("mem_last_cache")
57         or mem_now.swap  ~= helpers.set_map("mem_last_swap")
58         or mem_now.swapf ~= helpers.set_map("mem_last_swapf")
59         then
60             mem_now.used = mem_now.total - (mem_now.free + mem_now.buf + mem_now.cache)
61             mem_now.swapused = mem_now.swap - mem_now.swapf
62
63             widget = mem.widget
64             settings()
65
66             helpers.set_map("mem_last_total", mem_now.total)
67             helpers.set_map("mem_last_free", mem_now.free)
68             helpers.set_map("mem_last_buf", mem_now.buf)
69             helpers.set_map("mem_last_cache", mem_now.cache)
70             helpers.set_map("mem_last_swap", mem_now.swap)
71             helpers.set_map("mem_last_swapf", mem_now.swapf)
72         end
73     end
74
75     helpers.newtimer("mem", timeout, update)
76
77     return mem.widget
78 end
79
80 return setmetatable(mem, { __call = function(_, ...) return worker(...) end })