/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+ This file was then part of the GNU C Library. */
-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.
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
-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.
-
-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. */
+/* 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. */
#include "mmprivate.h"
-void *
-mmemalign (void *md, size_t alignment, size_t size)
+void *mmemalign(xbt_mheap_t mdp, size_t alignment, size_t size)
{
- void* result;
+ void *result;
unsigned long int adj;
struct alignlist *l;
- struct mdesc *mdp;
-
- if ((result = mmalloc (md, size + alignment - 1)) != NULL)
- {
- adj = RESIDUAL (result, alignment);
- if (adj != 0)
- {
- mdp = MD_TO_MDP (md);
- for (l = mdp -> aligned_blocks; l != NULL; l = l -> next)
- {
- if (l -> aligned == NULL)
- {
- /* This slot is free. Use it. */
- break;
- }
- }
- if (l == NULL)
- {
- l = (struct alignlist *) mmalloc (md, sizeof (struct alignlist));
- if (l == NULL)
- {
- mfree (md, result);
- return (NULL);
- }
- l -> next = mdp -> aligned_blocks;
- mdp -> aligned_blocks = l;
- }
- l -> exact = result;
- result = l -> aligned = (char*) result + alignment - adj;
- }
+
+ if ((result = mmalloc(mdp, size + alignment - 1)) != NULL) {
+ adj = RESIDUAL(result, alignment);
+ if (adj != 0) {
+ for (l = mdp->aligned_blocks; l != NULL; l = l->next) {
+ if (l->aligned == NULL) {
+ /* This slot is free. Use it. */
+ break;
+ }
+ }
+ if (l == NULL) {
+ l = (struct alignlist *) mmalloc(mdp, sizeof(struct alignlist));
+ if (l == NULL) {
+ mfree(mdp, result);
+ return (NULL);
+ }
+ l->next = mdp->aligned_blocks;
+ mdp->aligned_blocks = l;
+ }
+ l->exact = result;
+ result = l->aligned = (char *) result + alignment - adj;
}
+ }
return (result);
}
+
+/* Cache the pagesize for the current host machine. Note that if the host
+ does not readily provide a getpagesize() function, we need to emulate it
+ elsewhere, not clutter up this file with lots of kluges to try to figure
+ it out. */
+static size_t cache_pagesize;
+
+void *mvalloc(xbt_mheap_t mdp, size_t size)
+{
+ if (cache_pagesize == 0)
+ cache_pagesize = getpagesize();
+
+ return mmemalign(mdp, cache_pagesize, size);
+}
+
