From ae97a89e1a1a9833080dccc81f6cd26784e1b964 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Thu, 11 Jan 2001 11:42:17 +0000 Subject: A large update from Manuel Novoa III . --- libc/stdlib/malloc-930716/memalign.c | 61 ++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 libc/stdlib/malloc-930716/memalign.c (limited to 'libc/stdlib/malloc-930716/memalign.c') diff --git a/libc/stdlib/malloc-930716/memalign.c b/libc/stdlib/malloc-930716/memalign.c new file mode 100644 index 000000000..1098f5890 --- /dev/null +++ b/libc/stdlib/malloc-930716/memalign.c @@ -0,0 +1,61 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. + +This 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. + +This 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 this library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include "malloc.h" + +__ptr_t +memalign (alignment, size) + size_t alignment; + size_t size; +{ + __ptr_t result; + unsigned long int adj; + + result = malloc (size + alignment - 1); + if (result == NULL) + return NULL; + adj = (unsigned long int) ((unsigned long int) ((char *) result - + (char *) NULL)) % alignment; + if (adj != 0) + { + struct alignlist *l; + for (l = _aligned_blocks; l != NULL; l = l->next) + if (l->aligned == NULL) + /* This slot is free. Use it. */ + break; + if (l == NULL) + { + l = (struct alignlist *) malloc (sizeof (struct alignlist)); + if (l == NULL) + { +#if 1 + free (result); +#else + _free_internal (result); +#endif + return NULL; + } + l->next = _aligned_blocks; + _aligned_blocks = l; + } + l->exact = result; + result = l->aligned = (char *) result + alignment - adj; + } + + return result; +} -- cgit v1.2.3