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//
// Copyright (c) 1994, 1995 by Mike Romberg ( romberg@fsl.noaa.gov )
//
// This file may be distributed under terms of the GPL
//
// Most of this code was written by Werner Fink <werner@suse.de>.
// Only small changes were made on my part (M.R.)
//
// $Id: loadmeter.cc,v 1.8 1999/11/06 22:48:17 romberg Exp $
//
#include "loadmeter.h"
#include "xosview.h"
#include <fstream.h>
#include <stdlib.h>
static const char LOADFILENAME[] = "/proc/loadavg";
LoadMeter::LoadMeter( XOSView *parent )
: FieldMeterGraph( parent, 2, "LOAD", "PROCS/MIN", 1, 1, 0 ){
lastalarmstate = -1;
total_ = 2.0;
}
LoadMeter::~LoadMeter( void ){
}
void LoadMeter::checkResources( void ){
FieldMeterGraph::checkResources();
procloadcol_ = parent_->allocColor(parent_->getResource( "loadProcColor" ));
warnloadcol_ = parent_->allocColor(parent_->getResource( "loadWarnColor" ));
critloadcol_ = parent_->allocColor(parent_->getResource( "loadCritColor" ));
setfieldcolor( 0, procloadcol_ );
setfieldcolor( 1, parent_->getResource( "loadIdleColor" ) );
priority_ = atoi (parent_->getResource( "loadPriority" ) );
useGraph_ = parent_->isResourceTrue( "loadGraph" );
dodecay_ = parent_->isResourceTrue( "loadDecay" );
SetUsedFormat (parent_->getResource("loadUsedFormat"));
warnThreshold = atoi (parent_->getResource("loadWarnThreshold"));
critThreshold = atoi (parent_->getResource("loadCritThreshold"));
if (dodecay_){
// Warning: Since the loadmeter changes scale occasionally, old
// decay values need to be rescaled. However, if they are rescaled,
// they could go off the edge of the screen. Thus, for now, to
// prevent this whole problem, the load meter can not be a decay
// meter. The load is a decaying average kind of thing anyway,
// so having a decaying load average is redundant.
cerr << "Warning: The loadmeter can not be configured as a decay\n"
<< " meter. See the source code (" << __FILE__ << ") for further\n"
<< " details.\n";
dodecay_ = 0;
}
}
void LoadMeter::checkevent( void ){
getloadinfo();
drawfields();
}
void LoadMeter::getloadinfo( void ){
ifstream loadinfo( LOADFILENAME );
if ( !loadinfo ){
cerr <<"Can not open file : " <<LOADFILENAME <<endl;
parent_->done(1);
return;
}
loadinfo >> fields_[0];
if ( fields_[0] < warnThreshold ) alarmstate = 0;
else
if ( fields_[0] >= critThreshold ) alarmstate = 2;
else
/* if fields_[0] >= warnThreshold */ alarmstate = 1;
if ( alarmstate != lastalarmstate ){
if ( alarmstate == 0 ) setfieldcolor( 0, procloadcol_ );
else
if ( alarmstate == 1 ) setfieldcolor( 0, warnloadcol_ );
else
/* if alarmstate == 2 */ setfieldcolor( 0, critloadcol_ );
if (dolegends_) drawlegend();
lastalarmstate = alarmstate;
}
if ( fields_[0]*5.0<total_ )
total_ = fields_[0];
else
if ( fields_[0]>total_ )
total_ = fields_[0]*5.0;
if ( total_ < 1.0)
total_ = 1.0;
fields_[1] = (float) (total_ - fields_[0]);
setUsed(fields_[0], (float) 1.0);
}
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