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author | Mattias Andrée <maandree@member.fsf.org> | 2016-01-01 18:14:07 +0100 |
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committer | Mattias Andrée <maandree@member.fsf.org> | 2016-01-01 18:14:07 +0100 |
commit | e9dc4ff30eedfc944340f6c594b1ba36442f1020 (patch) | |
tree | 6c9cd3447f3b21f87fb18cafa381d8c2f5e427d7 /src/malloc/realloc.c | |
parent | doc (diff) | |
download | slibc-e9dc4ff30eedfc944340f6c594b1ba36442f1020.tar.gz slibc-e9dc4ff30eedfc944340f6c594b1ba36442f1020.tar.bz2 slibc-e9dc4ff30eedfc944340f6c594b1ba36442f1020.tar.xz |
partially split malloc.c
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
Diffstat (limited to '')
-rw-r--r-- | src/malloc/realloc.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/malloc/realloc.c b/src/malloc/realloc.c new file mode 100644 index 0000000..4356c2a --- /dev/null +++ b/src/malloc/realloc.c @@ -0,0 +1,53 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * 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/>. + */ +#include <stdlib.h> +#include <slibc-alloc.h> + + + +/** + * Variant of `malloc` that extends, or shrinks, an existing allocation, + * if beneficial and possible, or creates a new allocation with the new + * size, copies the data, and frees the old allocation. The returned + * pointer has an alignment usable for any compiler-independent intrinsic + * data type, if a new pointer is returned. + * + * On error, `ptr` is not freed. + * + * @etymology Memory (realloc)ation. + * + * @param ptr Pointer to the beginning of the old memory allocation. + * The process may crash if it does not point to the + * beginning of a memory allocation on the heap. + * However, if it is `NULL`, this function will behave + * like `malloc`. + * @param size The new allocation size. If zero, this function will + * behave like `free`, and will return `NULL`. + * @return Pointer to the beginning of the new allocation. + * If `size` is zero, `NULL` is returned. On error `NULL` + * is returned and `errno` is set to indicate the error. + * + * @throws ENOMEM The process cannot allocate more memory. + * + * @since Always. + */ +void* realloc(void* ptr, size_t size) +{ + return fast_realloc(ptr, size); +} + |