1 /* Copyright (C) 2004 Free Software Foundation, Inc. 2 3 This file is part of GCC. 4 5 GCC is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 GCC is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with GCC; see the file COPYING. If not, write to 17 the Free Software Foundation, 51 Franklin Street, Fifth Floor, 18 Boston, MA 02110-1301, USA. */ 19 20 /* As a special exception, if you include this header file into source 21 files compiled by GCC, this header file does not by itself cause 22 the resulting executable to be covered by the GNU General Public 23 License. This exception does not however invalidate any other 24 reasons why the executable file might be covered by the GNU General 25 Public License. */ 26 27 #ifndef _MM_MALLOC_H_INCLUDED 28 #define _MM_MALLOC_H_INCLUDED 29 30 #include <stdlib.h> 31 #include <errno.h> 32 33 static __inline__ void* 34 _mm_malloc (size_t size, size_t align) 35 { 36 void * malloc_ptr; 37 void * aligned_ptr; 38 39 /* Error if align is not a power of two. */ 40 if (align & (align - 1)) 41 { 42 errno = EINVAL; 43 return ((void*) 0); 44 } 45 46 if (size == 0) 47 return ((void *) 0); 48 49 /* Assume malloc'd pointer is aligned at least to sizeof (void*). 50 If necessary, add another sizeof (void*) to store the value 51 returned by malloc. Effectively this enforces a minimum alignment 52 of sizeof double. */ 53 if (align < 2 * sizeof (void *)) 54 align = 2 * sizeof (void *); 55 56 malloc_ptr = malloc (size + align); 57 if (!malloc_ptr) 58 return ((void *) 0); 59 60 /* Align We have at least sizeof (void *) space below malloc'd ptr. */ 61 aligned_ptr = (void *) (((size_t) malloc_ptr + align) 62 & ~((size_t) (align) - 1)); 63 64 /* Store the original pointer just before p. */ 65 ((void **) aligned_ptr) [-1] = malloc_ptr; 66 67 return aligned_ptr; 68 } 69 70 static __inline__ void 71 _mm_free (void * aligned_ptr) 72 { 73 if (aligned_ptr) 74 free (((void **) aligned_ptr) [-1]); 75 } 76 77 #endif /* _MM_MALLOC_H_INCLUDED */ 78
