/* Copyright (C) 2004 Free Software Foundation, Inc.
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/* Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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any later version.
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GCC is distributed in the hope that it will be useful,
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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Boston, MA 02110-1301, USA. */
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/* As a special exception, if you include this header file into source
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/* As a special exception, if you include this header file into source
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files compiled by GCC, this header file does not by itself cause
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files compiled by GCC, this header file does not by itself cause
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the resulting executable to be covered by the GNU General Public
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the resulting executable to be covered by the GNU General Public
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License. This exception does not however invalidate any other
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License. This exception does not however invalidate any other
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reasons why the executable file might be covered by the GNU General
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reasons why the executable file might be covered by the GNU General
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Public License. */
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Public License. */
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#ifndef _MM_MALLOC_H_INCLUDED
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#ifndef _MM_MALLOC_H_INCLUDED
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#define _MM_MALLOC_H_INCLUDED
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#define _MM_MALLOC_H_INCLUDED
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#include <stdlib.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <errno.h>
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static __inline__ void*
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static __inline__ void*
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_mm_malloc (size_t size, size_t align)
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_mm_malloc (size_t size, size_t align)
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{
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{
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void * malloc_ptr;
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void * malloc_ptr;
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void * aligned_ptr;
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void * aligned_ptr;
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/* Error if align is not a power of two. */
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/* Error if align is not a power of two. */
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if (align & (align - 1))
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if (align & (align - 1))
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{
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{
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errno = EINVAL;
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errno = EINVAL;
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return ((void*) 0);
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return ((void*) 0);
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}
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}
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if (size == 0)
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if (size == 0)
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return ((void *) 0);
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return ((void *) 0);
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/* Assume malloc'd pointer is aligned at least to sizeof (void*).
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/* Assume malloc'd pointer is aligned at least to sizeof (void*).
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If necessary, add another sizeof (void*) to store the value
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If necessary, add another sizeof (void*) to store the value
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returned by malloc. Effectively this enforces a minimum alignment
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returned by malloc. Effectively this enforces a minimum alignment
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of sizeof double. */
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of sizeof double. */
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if (align < 2 * sizeof (void *))
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if (align < 2 * sizeof (void *))
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align = 2 * sizeof (void *);
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align = 2 * sizeof (void *);
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malloc_ptr = malloc (size + align);
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malloc_ptr = malloc (size + align);
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if (!malloc_ptr)
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if (!malloc_ptr)
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return ((void *) 0);
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return ((void *) 0);
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/* Align We have at least sizeof (void *) space below malloc'd ptr. */
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/* Align We have at least sizeof (void *) space below malloc'd ptr. */
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aligned_ptr = (void *) (((size_t) malloc_ptr + align)
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aligned_ptr = (void *) (((size_t) malloc_ptr + align)
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& ~((size_t) (align) - 1));
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& ~((size_t) (align) - 1));
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/* Store the original pointer just before p. */
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/* Store the original pointer just before p. */
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((void **) aligned_ptr) [-1] = malloc_ptr;
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((void **) aligned_ptr) [-1] = malloc_ptr;
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return aligned_ptr;
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return aligned_ptr;
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}
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}
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static __inline__ void
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static __inline__ void
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_mm_free (void * aligned_ptr)
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_mm_free (void * aligned_ptr)
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{
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{
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if (aligned_ptr)
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if (aligned_ptr)
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free (((void **) aligned_ptr) [-1]);
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free (((void **) aligned_ptr) [-1]);
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}
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}
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#endif /* _MM_MALLOC_H_INCLUDED */
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#endif /* _MM_MALLOC_H_INCLUDED */
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