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[/] [or1k/] [tags/] [VER_5_3/] [gdb-5.3/] [mmalloc/] [mmemalign.c] - Rev 1782
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/* 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); }
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