diff options
Diffstat (limited to 'shared/systemd/src/basic/alloc-util.c')
| -rw-r--r-- | shared/systemd/src/basic/alloc-util.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/shared/systemd/src/basic/alloc-util.c b/shared/systemd/src/basic/alloc-util.c deleted file mode 100644 index 7f7eb433..00000000 --- a/shared/systemd/src/basic/alloc-util.c +++ /dev/null @@ -1,114 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ - -#include "nm-sd-adapt-shared.h" - -#include <malloc.h> -#include <stdint.h> -#include <string.h> - -#include "alloc-util.h" -#include "macro.h" -#include "memory-util.h" - -void* memdup(const void *p, size_t l) { - void *ret; - - assert(l == 0 || p); - - ret = malloc(l ?: 1); - if (!ret) - return NULL; - - memcpy(ret, p, l); - return ret; -} - -void* memdup_suffix0(const void *p, size_t l) { - void *ret; - - assert(l == 0 || p); - - /* The same as memdup() but place a safety NUL byte after the allocated memory */ - - if (_unlikely_(l == SIZE_MAX)) /* prevent overflow */ - return NULL; - - ret = malloc(l + 1); - if (!ret) - return NULL; - - *((uint8_t*) mempcpy(ret, p, l)) = 0; - return ret; -} - -void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { - size_t a, newalloc; - void *q; - - assert(p); - assert(allocated); - - if (*allocated >= need) - return *p; - - if (_unlikely_(need > SIZE_MAX/2)) /* Overflow check */ - return NULL; - - newalloc = need * 2; - if (size_multiply_overflow(newalloc, size)) - return NULL; - - a = newalloc * size; - if (a < 64) /* Allocate at least 64 bytes */ - a = 64; - - q = realloc(*p, a); - if (!q) - return NULL; - - if (size > 0) { - size_t bn; - - /* Adjust for the 64 byte minimum */ - newalloc = a / size; - - bn = malloc_usable_size(q) / size; - if (bn > newalloc) { - void *qq; - - /* The actual size allocated is larger than what we asked for. Let's call realloc() again to - * take possession of the extra space. This should be cheap, since libc doesn't have to move - * the memory for this. */ - - qq = reallocarray(q, bn, size); - if (_likely_(qq)) { - *p = qq; - *allocated = bn; - return qq; - } - } - } - - *p = q; - *allocated = newalloc; - return q; -} - -void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { - size_t prev; - uint8_t *q; - - assert(p); - assert(allocated); - - prev = *allocated; - - q = greedy_realloc(p, allocated, need, size); - if (!q) - return NULL; - - if (*allocated > prev) - memzero(q + prev * size, (*allocated - prev) * size); - - return q; -} |