From: Bruno Haible <bruno@clisp.org>
Date: Sat, 9 Jun 2007 10:56:40 +0000 (+0000)
Subject: Move to malloca.h.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d65bff1bbc85d84e09b5d5278cd0c209e09f76b;p=pspp

Move to malloca.h.
---

diff --git a/lib/allocsa.h b/lib/allocsa.h
deleted file mode 100644
index ffee917eea..0000000000
--- a/lib/allocsa.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/* Safe automatic memory allocation.
-   Copyright (C) 2003-2007 Free Software Foundation, Inc.
-   Written by Bruno Haible <bruno@clisp.org>, 2003.
-
-   This program 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 2, or (at your option)
-   any later version.
-
-   This program 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.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
-
-#ifndef _ALLOCSA_H
-#define _ALLOCSA_H
-
-#include <alloca.h>
-#include <stddef.h>
-#include <stdlib.h>
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-/* safe_alloca(N) is equivalent to alloca(N) when it is safe to call
-   alloca(N); otherwise it returns NULL.  It either returns N bytes of
-   memory allocated on the stack, that lasts until the function returns,
-   or NULL.
-   Use of safe_alloca should be avoided:
-     - inside arguments of function calls - undefined behaviour,
-     - in inline functions - the allocation may actually last until the
-       calling function returns.
-*/
-#if HAVE_ALLOCA
-/* The OS usually guarantees only one guard page at the bottom of the stack,
-   and a page size can be as small as 4096 bytes.  So we cannot safely
-   allocate anything larger than 4096 bytes.  Also care for the possibility
-   of a few compiler-allocated temporary stack slots.
-   This must be a macro, not an inline function.  */
-# define safe_alloca(N) ((N) < 4032 ? alloca (N) : NULL)
-#else
-# define safe_alloca(N) ((void) (N), NULL)
-#endif
-
-/* allocsa(N) is a safe variant of alloca(N).  It allocates N bytes of
-   memory allocated on the stack, that must be freed using freesa() before
-   the function returns.  Upon failure, it returns NULL.  */
-#if HAVE_ALLOCA
-# define allocsa(N) \
-  ((N) < 4032 - sa_increment					    \
-   ? (void *) ((char *) alloca ((N) + sa_increment) + sa_increment) \
-   : mallocsa (N))
-#else
-# define allocsa(N) \
-  mallocsa (N)
-#endif
-extern void * mallocsa (size_t n);
-
-/* Free a block of memory allocated through allocsa().  */
-#if HAVE_ALLOCA
-extern void freesa (void *p);
-#else
-# define freesa free
-#endif
-
-/* Maybe we should also define a variant
-    nallocsa (size_t n, size_t s) - behaves like allocsa (n * s)
-   If this would be useful in your application. please speak up.  */
-
-
-#ifdef __cplusplus
-}
-#endif
-
-
-/* ------------------- Auxiliary, non-public definitions ------------------- */
-
-/* Determine the alignment of a type at compile time.  */
-#if defined __GNUC__
-# define sa_alignof __alignof__
-#elif defined __cplusplus
-  template <class type> struct sa_alignof_helper { char __slot1; type __slot2; };
-# define sa_alignof(type) offsetof (sa_alignof_helper<type>, __slot2)
-#elif defined __hpux
-  /* Work around a HP-UX 10.20 cc bug with enums constants defined as offsetof
-     values.  */
-# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
-#elif defined _AIX
-  /* Work around an AIX 3.2.5 xlc bug with enums constants defined as offsetof
-     values.  */
-# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
-#else
-# define sa_alignof(type) offsetof (struct { char __slot1; type __slot2; }, __slot2)
-#endif
-
-enum
-{
-/* The desired alignment of memory allocations is the maximum alignment
-   among all elementary types.  */
-  sa_alignment_long = sa_alignof (long),
-  sa_alignment_double = sa_alignof (double),
-#if HAVE_LONG_LONG_INT
-  sa_alignment_longlong = sa_alignof (long long),
-#endif
-  sa_alignment_longdouble = sa_alignof (long double),
-  sa_alignment_max = ((sa_alignment_long - 1) | (sa_alignment_double - 1)
-#if HAVE_LONG_LONG_INT
-		      | (sa_alignment_longlong - 1)
-#endif
-		      | (sa_alignment_longdouble - 1)
-		     ) + 1,
-/* The increment that guarantees room for a magic word must be >= sizeof (int)
-   and a multiple of sa_alignment_max.  */
-  sa_increment = ((sizeof (int) + sa_alignment_max - 1) / sa_alignment_max) * sa_alignment_max
-};
-
-#endif /* _ALLOCSA_H */