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/* 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
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