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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
//
//
// $Id: cpumeter.cc,v 1.9 1999/02/24 22:16:20 romberg Exp $
//
#include "cpumeter.h"
#include "xosview.h"
#include <fstream.h>
#include <stdlib.h>
#include <string.h>
#include <strstream.h>
#include <ctype.h>
static const char STATFILENAME[] = "/proc/stat";
CPUMeter::CPUMeter(XOSView *parent, const char *cpuID)
: FieldMeterGraph( parent, 4, toUpper(cpuID), "USR/NICE/SYS/FREE" ) {
_lineNum = findLine(cpuID);
for ( int i = 0 ; i < 2 ; i++ )
for ( int j = 0 ; j < 4 ; j++ )
cputime_[i][j] = 0;
cpuindex_ = 0;
}
CPUMeter::~CPUMeter( void ){
}
void CPUMeter::checkResources( void ){
FieldMeterGraph::checkResources();
setfieldcolor( 0, parent_->getResource( "cpuUserColor" ) );
setfieldcolor( 1, parent_->getResource( "cpuNiceColor" ) );
setfieldcolor( 2, parent_->getResource( "cpuSystemColor" ) );
setfieldcolor( 3, parent_->getResource( "cpuFreeColor" ) );
priority_ = atoi (parent_->getResource( "cpuPriority" ) );
dodecay_ = parent_->isResourceTrue( "cpuDecay" );
useGraph_ = parent_->isResourceTrue( "cpuGraph" );
SetUsedFormat (parent_->getResource("cpuUsedFormat"));
}
void CPUMeter::checkevent( void ){
getcputime();
drawfields();
}
void CPUMeter::getcputime( void ){
total_ = 0;
char tmp[1024];
ifstream stats( STATFILENAME );
if ( !stats ){
cerr <<"Can not open file : " <<STATFILENAME <<endl;
exit( 1 );
}
// read until we are at the right line.
for (int i = 0 ; i < _lineNum ; i++)
stats.getline(tmp, 1024);
stats >>tmp >>cputime_[cpuindex_][0]
>>cputime_[cpuindex_][1]
>>cputime_[cpuindex_][2]
>>cputime_[cpuindex_][3];
int oldindex = (cpuindex_+1)%2;
for ( int i = 0 ; i < 4 ; i++ ){
fields_[i] = cputime_[cpuindex_][i] - cputime_[oldindex][i];
total_ += fields_[i];
}
if (total_){
setUsed (total_ - fields_[3], total_);
cpuindex_ = (cpuindex_ + 1) % 2;
}
}
int CPUMeter::findLine(const char *cpuID){
ifstream stats( STATFILENAME );
if ( !stats ){
cerr <<"Can not open file : " <<STATFILENAME <<endl;
exit( 1 );
}
int line = -1;
char buf[1024];
while (!stats.eof()){
stats.getline(buf, 1024);
if (!stats.eof()){
line++;
if (!strncmp(cpuID, buf, strlen(cpuID)) && buf[strlen(cpuID)] == ' ')
return line;
}
}
return -1;
}
// Checks for the SMP kernel patch by forissier@isia.cma.fr.
// http://www-isia.cma.fr/~forissie/smp_kernel_patch/
// If it finds that this patch has been applied to the current kernel
// then returns the number of cpus that are on this machine.
int CPUMeter::countCPUs(void){
ifstream stats( STATFILENAME );
if ( !stats ){
cerr <<"Can not open file : " <<STATFILENAME <<endl;
exit( 1 );
}
int cpuCount = 0;
char buf[1024];
while (!stats.eof()){
stats.getline(buf, 1024);
if (!stats.eof()){
if (!strncmp(buf, "cpu", 3) && buf[3] != ' ')
cpuCount++;
}
}
return cpuCount;
}
const char *CPUMeter::cpuStr(int num){
static char buffer[32];
ostrstream str(buffer, 32);
str << "cpu";
if (num != 0)
str << (num - 1);
str << ends;
return buffer;
}
const char *CPUMeter::toUpper(const char *str){
static char buffer[1024];
strncpy(buffer, str, 1024);
for (char *tmp = buffer ; *tmp != '\0' ; tmp++)
*tmp = toupper(*tmp);
return buffer;
}
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