pmt: revert 7f8090b

include/libgnulib/alignalloc.h

@@ -1,133 +0,0 @@
-/* aligned memory allocation
-
-   Copyright 2022-2024 Free Software Foundation, Inc.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file 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 Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-/* Written by Paul Eggert.  */
-
-#ifndef ALIGNALLOC_H_
-#define ALIGNALLOC_H_
-
-/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, _GL_ATTRIBUTE_ALLOC_SIZE,
-   _GL_ATTRIBUTE_MALLOC, _GL_ATTRIBUTE_RETURNS_NONNULL, HAVE_POSIX_MEMALIGN.  */
-#if !_GL_CONFIG_H_INCLUDED
- #error "Please include config.h first."
-#endif
-
-#include <errno.h>
-#include <stdlib.h>
-#include "idx.h"
-#if defined __CHERI_PURE_CAPABILITY__
-# include <cheri.h>
-#endif
-
-_GL_INLINE_HEADER_BEGIN
-#ifndef ALIGNALLOC_INLINE
-# define ALIGNALLOC_INLINE _GL_INLINE
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-/* Whether aligned_alloc supports any power-of-two alignment,
-   returns a nonnull pointer for size-zero allocations,
-   and sets errno on failure.  */
-#if 2 < __GLIBC__ + (16 <= __GLIBC_MINOR__)
-# define ALIGNALLOC_VIA_ALIGNED_ALLOC 1
-#else
-# define ALIGNALLOC_VIA_ALIGNED_ALLOC 0
-#endif
-
-/* Work around AddressSanitizer bug.
-   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104262
-   https://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20220124/1001910.html
-   */
-#ifdef __SANITIZE_ADDRESS__
-# undef ALIGNALLOC_VIA_ALIGNED_ALLOC
-# define ALIGNALLOC_VIA_ALIGNED_ALLOC 0
-#endif
-#ifdef __has_feature
-# if __has_feature (address_sanitizer)
-#  undef ALIGNALLOC_VIA_ALIGNED_ALLOC
-#  define ALIGNALLOC_VIA_ALIGNED_ALLOC 0
-# endif
-#endif
-
-#if ALIGNALLOC_VIA_ALIGNED_ALLOC || HAVE_POSIX_MEMALIGN
-
-/* Free storage allocated via alignalloc.  Do nothing if PTR is null.  */
-
-ALIGNALLOC_INLINE void
-alignfree (void *ptr)
-{
-  free (ptr);
-}
-
-/* Return an ALIGNMENT-aligned pointer to new storage of size SIZE,
-   or a null pointer (setting errno) if memory is exhausted.
-   ALIGNMENT must be a power of two.
-   If SIZE is zero, on success return a unique pointer each time.
-   To free storage later, call alignfree.  */
-
-ALIGNALLOC_INLINE
-_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((2))
-/* _GL_ATTRIBUTE_DEALLOC (alignfree, 1) */
-void *
-alignalloc (idx_t alignment, idx_t size)
-{
-  if ((size_t) -1 < alignment)
-    alignment = (size_t) -1;
-  if ((size_t) -1 < size)
-    size = (size_t) -1;
-
-# if ALIGNALLOC_VIA_ALIGNED_ALLOC
-  return aligned_alloc (alignment, size);
-# else
-  void *ptr = NULL;
-  if (alignment < sizeof (void *))
-    alignment = sizeof (void *);
-  errno = posix_memalign (&ptr, alignment, size | !size);
-#  if defined __CHERI_PURE_CAPABILITY__
-  if (ptr != NULL)
-    ptr = cheri_bounds_set (ptr, size);
-#  endif
-  return ptr;
-# endif
-}
-
-#else /* ! (ALIGNALLOC_VIA_ALIGNED_ALLOC || HAVE_POSIX_MEMALIGN) */
-
-void alignfree (void *);
-void *alignalloc (idx_t, idx_t)
-  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((2))
-  _GL_ATTRIBUTE_DEALLOC (alignfree, 1);
-
-#endif
-
-/* Like alignalloc, but die instead of returning a null pointer.  */
-void *xalignalloc (idx_t, idx_t)
-  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((2))
-  _GL_ATTRIBUTE_RETURNS_NONNULL /* _GL_ATTRIBUTE_DEALLOC (alignfree, 1) */;
-
-
-#ifdef __cplusplus
-}
-#endif
-
-_GL_INLINE_HEADER_END
-
-#endif /* !ALIGNALLOC_H_ */