  This is a version (aka dlmalloc) of malloc/free/realloc written by
  Doug Lea and released to the public domain, as explained at
  http://creativecommons.org/licenses/publicdomain.  Send questions,
  comments, complaints, performance data, etc to dl@cs.oswego.edu
  Note: There may be an updated version of this malloc obtainable at
        ftp://gee.cs.oswego.edu/pub/misc/malloc.c
