--- /dev/null
+/* Memory allocators such as malloc+free.
+
+ Copyright (C) 2011 Free Software Foundation, Inc.
+
+ 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert. */
+
+#ifndef _GL_ALLOCATOR_H
+
+#include <stddef.h>
+
+/* An object describing a memory allocator family. */
+
+struct allocator
+{
+ /* Do not use GCC attributes such as __attribute__ ((malloc)) with
+ the function types pointed at by these members, because these
+ attributes do not work with pointers to functions. See
+ <http://lists.gnu.org/archive/html/bug-gnulib/2011-04/msg00007.html>. */
+
+ /* Call MALLOC to allocate memory, like 'malloc'. On failure MALLOC
+ should return NULL, though not necessarily set errno. When given
+ a zero size it may return NULL even if successful. */
+ void *(*malloc) (size_t);
+
+ /* If nonnull, call REALLOC to reallocate memory, like 'realloc'.
+ On failure REALLOC should return NULL, though not necessarily set
+ errno. When given a zero size it may return NULL even if
+ successful. */
+ void *(*realloc) (void *, size_t);
+
+ /* Call FREE to free memory, like 'free'. */
+ void (*free) (void *);
+
+ /* If nonnull, call DIE if MALLOC or REALLOC fails. DIE should not
+ return. DIE can be used by code that detects memory overflow
+ while calculating sizes to be passed to MALLOC or REALLOC. */
+ void (*die) (void);
+};
+
+#endif