Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 62 insertions, 0 deletions

diff --git a/mmalloc/mmemalign.c b/mmalloc/mmemalign.c
new file mode 100644
index 0000000..3ada027
--- /dev/null
+++ b/mmalloc/mmemalign.c
@@ -0,0 +1,62 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+This file is 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.
+
+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.  */
+
+#include "mmprivate.h"
+
+PTR
+mmemalign (md, alignment, size)
+  PTR md;
+  size_t alignment;
+  size_t size;
+{
+  PTR 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;
+	}
+    }
+  return (result);
+}