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pool.c (mrb_pool_realloc): do nothing if realloc() tries to shrink

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Yukihiro "Matz" Matsumoto
2023-10-05 22:17:26 +09:00
parent 42a621b42e
commit a538837fb1
1 changed files with 2 additions and 0 deletions
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src/pool.c
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@@ -149,10 +149,12 @@ MRB_API void*
mrb_pool_realloc(mrb_pool *pool, void *p, size_t oldlen, size_t newlen)
{
if (!pool) return NULL;
if (newlen < oldlen) return p;
oldlen += ALIGN_PADDING(oldlen);
newlen += ALIGN_PADDING(newlen);
for (struct mrb_pool_page *page = pool->pages; page; page = page->next) {
if (page->last == p) {
/* if p is a last allocation from the page */
size_t beg = (char*)p - page->page;
if (beg + oldlen != page->offset) break;
if (beg + newlen > page->len) {