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authorJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
committerJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
commitbe8efac78d067c138ad8dda03df4336e73f94887 (patch)
tree5f5254a628ba0ef72065b93d949d1c985742ea8e /lib/malloca.h
parent7b65dbd4ebade81d504cfe5e681292a58ad1fdf0 (diff)
New upstream version 1.0upstream/1.0
Diffstat (limited to 'lib/malloca.h')
-rw-r--r--lib/malloca.h56
1 files changed, 23 insertions, 33 deletions
diff --git a/lib/malloca.h b/lib/malloca.h
index 8e47c166..7ec235f3 100644
--- a/lib/malloca.h
+++ b/lib/malloca.h
@@ -1,28 +1,19 @@
/* Safe automatic memory allocation.
- Copyright (C) 2003-2007, 2009-2018 Free Software Foundation, Inc.
+ Copyright (C) 2003-2007, 2009-2022 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 either:
+ 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.
- * the GNU Lesser General Public License as published by the Free
- Software Foundation; either version 3 of the License, or (at your
- option) any later version.
-
- or
-
- * the GNU General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your
- option) any later version.
-
- or both in parallel, as here.
- This program is distributed in the hope that it will be useful,
+ 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 General Public License for more details.
+ GNU Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, see <https://www.gnu.org/licenses/>. */
+ 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/>. */
#ifndef _MALLOCA_H
#define _MALLOCA_H
@@ -60,6 +51,13 @@ extern "C" {
# define safe_alloca(N) ((void) (N), NULL)
#endif
+/* Free a block of memory allocated through malloca(). */
+#if HAVE_ALLOCA
+extern void freea (void *p);
+#else
+# define freea free
+#endif
+
/* malloca(N) is a safe variant of alloca(N). It allocates N bytes of
memory allocated on the stack, that must be freed using freea() before
the function returns. Upon failure, it returns NULL. */
@@ -74,20 +72,16 @@ extern "C" {
# define malloca(N) \
mmalloca (N)
#endif
-extern void * mmalloca (size_t n);
-
-/* Free a block of memory allocated through malloca(). */
-#if HAVE_ALLOCA
-extern void freea (void *p);
-#else
-# define freea free
-#endif
+extern void *mmalloca (size_t n)
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (freea, 1)
+ _GL_ATTRIBUTE_ALLOC_SIZE ((1));
/* nmalloca(N,S) is an overflow-safe variant of malloca (N * S).
It allocates an array of N objects, each with S bytes of memory,
- on the stack. S must be positive and N must be nonnegative.
+ on the stack. N and S should be nonnegative and free of side effects.
The array must be freed using freea() before the function returns. */
-#define nmalloca(n, s) (xalloc_oversized (n, s) ? NULL : malloca ((n) * (s)))
+#define nmalloca(n, s) \
+ (xalloc_oversized (n, s) ? NULL : malloca ((n) * (size_t) (s)))
#ifdef __cplusplus
@@ -98,7 +92,7 @@ extern void freea (void *p);
/* ------------------- Auxiliary, non-public definitions ------------------- */
/* Determine the alignment of a type at compile time. */
-#if defined __GNUC__ || defined __IBM__ALIGNOF__
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
# define sa_alignof __alignof__
#elif defined __cplusplus
template <class type> struct sa_alignof_helper { char __slot1; type __slot2; };
@@ -121,14 +115,10 @@ enum
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
};