diff options
Diffstat (limited to 'src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h')
| -rw-r--r-- | src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h b/src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h index 78e2dbec59..6870f54f58 100644 --- a/src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h +++ b/src/libnm-systemd-shared/src/fundamental/memory-util-fundamental.h @@ -11,6 +11,12 @@ #include "macro-fundamental.h" +#define memzero(x, l) \ + ({ \ + size_t _l_ = (l); \ + _l_ > 0 ? memset((x), 0, _l_) : (x); \ + }) + #if !SD_BOOT && HAVE_EXPLICIT_BZERO static inline void *explicit_bzero_safe(void *p, size_t l) { if (p && l > 0) @@ -64,3 +70,39 @@ static inline void erase_varp(struct VarEraser *e) { .p = (ptr), \ .size = (sz), \ } + +typedef void (*free_array_func_t)(void *p, size_t n); + +/* An automatic _cleanup_-like logic for destroy arrays (i.e. pointers + size) when leaving scope */ +typedef struct ArrayCleanup { + void **parray; + size_t *pn; + free_array_func_t pfunc; +} ArrayCleanup; + +static inline void array_cleanup(const ArrayCleanup *c) { + assert(c); + + assert(!c->parray == !c->pn); + + if (!c->parray) + return; + + if (*c->parray) { + assert(c->pfunc); + c->pfunc(*c->parray, *c->pn); + *c->parray = NULL; + } + + *c->pn = 0; +} + +#define CLEANUP_ARRAY(array, n, func) \ + _cleanup_(array_cleanup) _unused_ const ArrayCleanup CONCATENATE(_cleanup_array_, UNIQ) = { \ + .parray = (void**) &(array), \ + .pn = &(n), \ + .pfunc = (free_array_func_t) ({ \ + void (*_f)(typeof(array[0]) *a, size_t b) = func; \ + _f; \ + }), \ + } |