libbase/jemalloc_gnash.c

   1 /*
   2  *   Copyright (C) 2013 Free Software Foundation, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  */
  19
  20 #include <stddef.h>
  21 #include <jemalloc.h>
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include "gnashconfig.h"
  25 #endif
  26
  27 #ifdef USE_STATS_MEMORY
  28
  29 /* Borrowed from malloc.h, as this is Linux specific. This has been
  30  * added to jemalloc so the existing memory profiling in Gnash will
  31  * continue to work. Most of these fields aren't used by the Gnash
  32  * memory profiling, but we leave them here for a semblance of
  33  * portability. The only fields Gnash uses are arena, uordblks. and
  34  * fordblks.
  35  */
  36 struct mallinfo {
  37     int arena;    /* non-mmapped space allocated from system */
  38     int ordblks;  /* number of free chunks UNUSED */
  39     int smblks;   /* number of fastbin blocks UNUSED */
  40     int hblks;    /* number of mmapped regions UNUSED */
  41     int hblkhd;   /* space in mmapped regions UNUSED */
  42     int usmblks;  /* maximum total allocated space UNUSED */
  43     int fsmblks;  /* space available in freed fastbin blocks UNUSED */
  44     int uordblks; /* total allocated space */
  45     int fordblks; /* total free space */
  46     int keepcost; /* top-most, releasable space UNUSED */
  47 };
  48
  49 struct mallinfo mallinfo (void);
  50
  51 struct mallinfo
  52 mallinfo(void)
  53 {
  54     struct mallinfo mi = {0,};
  55
  56     size_t len = sizeof(mi.arena);
  57     mallctl("stats.mapped", &mi.arena, &len, NULL, 0);
  58     len = sizeof(mi.uordblks);
  59     mallctl("stats.allocated", &mi.uordblks, &len, NULL, 0);
  60
  61     mi.fordblks = mi.arena - mi.uordblks;
  62
  63     return mi;
  64 }
  65
  66 #endif /* USE_STATS_MEMORY */