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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [i386/] [gmm_malloc.h] - Rev 282
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/* Copyright (C) 2004, 2009 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC 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 General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _MM_MALLOC_H_INCLUDED #define _MM_MALLOC_H_INCLUDED #include <stdlib.h> #include <errno.h> static __inline__ void* _mm_malloc (size_t size, size_t align) { void * malloc_ptr; void * aligned_ptr; /* Error if align is not a power of two. */ if (align & (align - 1)) { errno = EINVAL; return ((void*) 0); } if (size == 0) return ((void *) 0); /* Assume malloc'd pointer is aligned at least to sizeof (void*). If necessary, add another sizeof (void*) to store the value returned by malloc. Effectively this enforces a minimum alignment of sizeof double. */ if (align < 2 * sizeof (void *)) align = 2 * sizeof (void *); malloc_ptr = malloc (size + align); if (!malloc_ptr) return ((void *) 0); /* Align We have at least sizeof (void *) space below malloc'd ptr. */ aligned_ptr = (void *) (((size_t) malloc_ptr + align) & ~((size_t) (align) - 1)); /* Store the original pointer just before p. */ ((void **) aligned_ptr) [-1] = malloc_ptr; return aligned_ptr; } static __inline__ void _mm_free (void * aligned_ptr) { if (aligned_ptr) free (((void **) aligned_ptr) [-1]); } #endif /* _MM_MALLOC_H_INCLUDED */