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# -*-Perl-*-
# instances allowed: one
# (single instance modules would be silly to use more than one of
# anyway, so we use package local storage. This is faster and places
# less artificial load on the machine than doing everything through
# the object hash)
package MGMmodule::memuse;
use IO::Seekable;
use vars qw($xpath $widget $graph $memtotal $swaptotal $memuse $swapuse $bars);
sub module_init{
my$this=shift;
my$toplevel=$this->{"toplevel"};
my$xclass=$this->{"xclass"};
$this->read_proc;
unless ($memtotal){
$toplevel->optionAdd("$xclass*active",'false',21);
}
$toplevel->optionAdd("$xclass.order", 100,21);
$this;
}
sub module_instance{
my$this=shift;
my$toplevel=$this->{"toplevel"};
return undef if(defined($xpath));
$xpath=$this->{"xpath"};
my($adj,$mult)=MGM::Graph::scalemod($memtotal);
$toplevel->optionAdd("$xpath.bar.0.label", "memory ($adj$mult"."B)",21);
($adj,$mult)=MGM::Graph::scalemod($swaptotal);
$toplevel->optionAdd("$xpath.bar.1.label", "swap ($adj$mult"."B)",21);
$bars=1;
$bars++ if($swaptotal);
my($minx,$miny)=&MGM::Graph::calcxysize($this,100,'% used',$bars);
$toplevel->optionAdd("$xpath.minx", $minx,21);
$toplevel->optionAdd("$xpath.miny", $miny,21);
# modify defaults
# for some reason, reading from /proc/meminfo is *very* expensive.
# don't do it often.
$toplevel->optionAdd("$xpath.scalerefresh",2000,21); # 2s
$toplevel->optionAdd("$xpath.scalewidadj", 80*$bars,21); # narrower
$toplevel->optionAdd("$xpath.scalelenadj", 60,21); # shorter
$this;
}
sub module_run{
my$this=shift;
$graph=MGM::Graph->new($this,num=>$bars,prompt=>'% used',fixed=>1,
rangesetting=>100,rangecurrent=>100);
$widget=$graph->{"widget"}; # must return the widget
}
sub module_update{
my$this=shift;
$this->read_proc;
if($bars==2 && $swaptotal>0){
$graph->set($memuse/$memtotal*100,$swapuse/$swaptotal*100);
}else{
$graph->set($memuse/$memtotal*100);
}
}
sub read_proc{
if(open(PROC,"/proc/meminfo")){
<PROC>;
$_=<PROC>;
if(m/^Mem:\s+(\d+)\s+(\d+)\s+\d+\s+\d+\s+(\d+)\s+(\d+)/){
$memtotal=$1;
$memuse=$2-$3-$4;
}else{
$memtotal=0;
$memuse=0;
}
$_=<PROC>;
if(m/^Swap:\s+(\d+)\s+(\d+)/){
$swaptotal=$1;
$swapuse=$2;
}else{
$swaptotal=0;
$swapuse=0;
}
close PROC;
}
}
bless {};
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