diff options
Diffstat (limited to 'gnu/usr.bin/gdb/mmalloc/mmemalign.c')
-rw-r--r-- | gnu/usr.bin/gdb/mmalloc/mmemalign.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gnu/usr.bin/gdb/mmalloc/mmemalign.c b/gnu/usr.bin/gdb/mmalloc/mmemalign.c new file mode 100644 index 0000000..63350a2 --- /dev/null +++ b/gnu/usr.bin/gdb/mmalloc/mmemalign.c @@ -0,0 +1,64 @@ +/* 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include "mmalloc.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; + + size = ((size + alignment - 1) / alignment) * alignment; + + if ((result = mmalloc (md, size)) != 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 -> exact = result; + result = l -> aligned = (char *) result + alignment - adj; + l -> next = mdp -> aligned_blocks; + mdp -> aligned_blocks = l; + } + } + return (result); +} |