mpp/mpp_memuse.c

   1 /***********************************************************************
   2  *                   GNU Lesser General Public License
   3  *
   4  * This file is part of the GFDL Flexible Modeling System (FMS).
   5  *
   6  * FMS is free software: you can redistribute it and/or modify it under
   7  * the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or (at
   9  * your option) any later version.
  10  *
  11  * FMS is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FMS.  If not, see <http://www.gnu.org/licenses/>.
  18  **********************************************************************/
  19
  20 /**
  21  * \Author  David Robert Nadeau
  22  * Site:    http://NadeauSoftware.com/
  23  * License: Creative Commons Attribution 3.0 Unported License
  24  *          http://creativecommons.org/licenses/by/3.0/deed.en_US
  25  */
  26
  27 /* Include headers common for Unix and Unix-like OSs.  __unix__ is defined on Linux OSs */
  28 #if defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
  29 #include <unistd.h>
  30 #include <sys/resource.h>
  31
  32 /* Include specific headers for specific OS types */
  33 #if defined(__APPLE__) && defined(__MACH__)
  34 #include <mach/mach.h>
  35
  36 #elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
  37 #include <stdio.h>
  38 /* #endif for specific headers checks */
  39 #endif
  40
  41 #else
  42 /* Not a Unix-like OS.  Not supported */
  43 #error "Cannot define getPeakRSS( ) for an unknown OS."
  44 #endif
  45
  46 /**
  47  * Returns the peak (maximum so far) resident set size (physical
  48  * memory use) measured in bytes, or zero if the value cannot be
  49  * determined on this OS.
  50  */
  51 size_t getpeakrss( )
  52 {
  53 #if defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
  54     /* BSD, Linux, and OSX -------------------------------------- */
  55     struct rusage rusage;
  56     getrusage( RUSAGE_SELF, &rusage );
  57 #if defined(__APPLE__) && defined(__MACH__)
  58     return (size_t)rusage.ru_maxrss;
  59 #else
  60     return (size_t)(rusage.ru_maxrss * 1024L);
  61 #endif
  62
  63 #else
  64     /* Unknown OS ----------------------------------------------- */
  65     return (size_t)0L;          /* Unsupported. */
  66 #endif
  67 }