cosmotool/external/sharp/c_utils/memusage.c

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2012-11-10 14:59:10 +01:00
/*
* This file is part of libc_utils.
*
* libc_utils is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libc_utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libc_utils; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* libc_utils is being developed at the Max-Planck-Institut fuer Astrophysik
* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
* (DLR).
*/
/*
* Functionality for measuring memory consumption
*
* Copyright (C) 2012 Max-Planck-Society
* Author: Martin Reinecke
*/
#include <stdio.h>
#include <string.h>
#include "memusage.h"
double residentSetSize(void)
{
FILE *statm = fopen("/proc/self/statm","r");
double res;
if (!statm) return -1.0;
fscanf(statm,"%*f %lf",&res);
fclose(statm);
return (res*4096);
}
double VmHWM(void)
{
char word[1024];
FILE *f = fopen("/proc/self/status", "r");
double res;
if (!f) return -1.0;
while(1)
{
if (fscanf (f,"%1023s",word)<0)
{ fclose(f); return -1.0; }
if (!strncmp(word, "VmHWM:", 6))
{
fscanf(f,"%lf",&res);
fscanf(f,"%2s",word);
if (strncmp(word, "kB", 2))
{ fclose(f); return -1.0; }
res *=1024;
fclose(f);
return res;
}
}
}