X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8868f3e0668d8278936a3c79bae72a485b03d8c8..011b6e172c0b7366132196dd9797f7bc3b951df2:/src/xbt/mmalloc/sbrk-sup.c

diff --git a/src/xbt/mmalloc/sbrk-sup.c b/src/xbt/mmalloc/sbrk-sup.c
index 4fa77c856f..40638c970c 100644
--- a/src/xbt/mmalloc/sbrk-sup.c
+++ b/src/xbt/mmalloc/sbrk-sup.c
@@ -1,101 +1,39 @@
 /* Support for sbrk() regions.
    Copyright 1992, 2000 Free Software Foundation, Inc.
-   Contributed by Fred Fish at Cygnus Support.   fnf@cygnus.com
+   Contributed by Fred Fish at Cygnus Support.   fnf@cygnus.com */
 
-This file is part of the GNU C Library.
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved.                                                     */
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
 
-The GNU C Library 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
-Library General Public License for more details.
+#include <unistd.h>             /* Prototypes for sbrk (maybe) */
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
-
-#include <unistd.h>	/* Prototypes for sbrk (maybe) */
-
-#include <string.h>	/* Prototypes for memcpy, memmove, memset, etc */
+#include <string.h>             /* Prototypes for memcpy, memmove, memset, etc */
 
+#include "xbt.h"
 #include "mmprivate.h"
 
-static void* sbrk_morecore (struct mdesc *mdp, int size);
+static void *sbrk_morecore(struct mdesc *mdp, int size);
 #if NEED_DECLARATION_SBRK
-extern void* sbrk (int size);
+extern void *sbrk(int size);
 #endif
 
-/* The mmalloc() package can use a single implicit malloc descriptor
-   for mmalloc/mrealloc/mfree operations which do not supply an explicit
-   descriptor.  For these operations, sbrk() is used to obtain more core
-   from the system, or return core.  This allows mmalloc() to provide
-   backwards compatibility with the non-mmap'd version. */
-
-struct mdesc *__mmalloc_default_mdp;
 
 /* Use sbrk() to get more core. */
 
-static void*
-sbrk_morecore (mdp, size)
-  struct mdesc *mdp;
-  int size;
+static void *sbrk_morecore(mdp, size)
+struct mdesc *mdp;
+int size;
 {
-  void* result;
-
-  if ((result = sbrk (size)) == (void*) -1)
-    {
-      result = NULL;
-    }
-  else
-    {
-      mdp -> breakval = (char*)mdp -> breakval + size;
-      mdp -> top      = (char*)mdp -> top + size;
-    }
+  void *result;
+
+  if ((result = sbrk(size)) == (void *) -1) {
+    result = NULL;
+  } else {
+    mdp->breakval = (char *) mdp->breakval + size;
+    mdp->top = (char *) mdp->top + size;
+  }
   return (result);
 }
-
-/* Initialize the default malloc descriptor if this is the first time
-   a request has been made to use the default sbrk'd region.
-
-   Since no alignment guarantees are made about the initial value returned
-   by sbrk, test the initial value and (if necessary) sbrk enough additional
-   memory to start off with alignment to BLOCKSIZE.  We actually only need
-   it aligned to an alignment suitable for any object, so this is overkill.
-   But at most it wastes just part of one BLOCKSIZE chunk of memory and
-   minimizes portability problems by avoiding us having to figure out
-   what the actual minimal alignment is.  The rest of the malloc code
-   avoids this as well, by always aligning to the minimum of the requested
-   size rounded up to a power of two, or to BLOCKSIZE.
-
-   Note that we are going to use some memory starting at this initial sbrk
-   address for the sbrk region malloc descriptor, which is a struct, so the
-   base address must be suitably aligned. */
-
-struct mdesc *
-__mmalloc_sbrk_init (void)
-{
-  void* base;
-  unsigned int adj;
-
-  base = sbrk (0);
-  adj = RESIDUAL (base, BLOCKSIZE);
-  if (adj != 0)
-    {
-      sbrk (BLOCKSIZE - adj);
-      base = sbrk (0);
-    }
-  __mmalloc_default_mdp = (struct mdesc *) sbrk (sizeof (struct mdesc));
-  memset ((char *) __mmalloc_default_mdp, 0, sizeof (struct mdesc));
-  __mmalloc_default_mdp -> morecore = sbrk_morecore;
-  __mmalloc_default_mdp -> base = base;
-  __mmalloc_default_mdp -> breakval = __mmalloc_default_mdp -> top = sbrk (0);
-  __mmalloc_default_mdp -> fd = -1;
-  return (__mmalloc_default_mdp);
-}
-
-