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review realloc

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This commit is contained in:
daanx 2023-04-18 19:48:40 -07:00
parent e6f3647556
commit b549c88e6c
1 changed files with 4 additions and 6 deletions
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10
src/alloc.c
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@ -700,14 +700,12 @@ void* _mi_heap_realloc_zero(mi_heap_t* heap, void* p, size_t newsize, bool zero)
if (zero && newsize > size) {
// also set last word in the previous allocation to zero to ensure any padding is zero-initialized
const size_t start = (size >= sizeof(intptr_t) ? size - sizeof(intptr_t) : 0);
memset((uint8_t*)newp + start, 0, newsize - start);
_mi_memzero((uint8_t*)newp + start, newsize - start);
}
if mi_likely(p != NULL) {
if mi_likely(_mi_is_aligned(p, sizeof(uintptr_t))) { // a client may pass in an arbitrary pointer `p`..
const size_t copysize = (newsize > size ? size : newsize);
mi_track_mem_defined(p,copysize); // _mi_useable_size may be too large for byte precise memory tracking..
_mi_memcpy_aligned(newp, p, copysize);
}
const size_t copysize = (newsize > size ? size : newsize);
mi_track_mem_defined(p,copysize); // _mi_useable_size may be too large for byte precise memory tracking..
_mi_memcpy(newp, p, copysize);
mi_free(p); // only free the original pointer if successful
}
}