| /* Memory allocators such as malloc+free. |
| |
| Copyright (C) 2011-2019 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 <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Paul Eggert. */ |
| |
| #ifndef _GL_ALLOCATOR_H |
| #define _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 |
| <https://lists.gnu.org/r/bug-gnulib/2011-04/msg00007.html>. */ |
| |
| /* Call ALLOCATE to allocate memory, like 'malloc'. On failure ALLOCATE |
| should return NULL, though not necessarily set errno. When given |
| a zero size it may return NULL even if successful. */ |
| void *(*allocate) (size_t); |
| |
| /* If nonnull, call REALLOCATE to reallocate memory, like 'realloc'. |
| On failure REALLOCATE should return NULL, though not necessarily set |
| errno. When given a zero size it may return NULL even if |
| successful. */ |
| void *(*reallocate) (void *, size_t); |
| |
| /* Call FREE to free memory, like 'free'. */ |
| void (*free) (void *); |
| |
| /* If nonnull, call DIE (SIZE) if MALLOC (SIZE) or REALLOC (..., |
| SIZE) fails. DIE should not return. SIZE should equal SIZE_MAX |
| if size_t overflow was detected while calculating sizes to be |
| passed to MALLOC or REALLOC. */ |
| void (*die) (size_t); |
| }; |
| |
| /* An allocator using the stdlib functions and a null DIE function. */ |
| extern struct allocator const stdlib_allocator; |
| |
| #endif /* _GL_ALLOCATOR_H */ |