olemorud/arena-allocator
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optimize shrinking reallocs

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Ole Morud
2023-06-17 12:14:28 +02:00
parent b3638c3c00
commit cf964c4dcc
1 changed files with 5 additions and 0 deletions
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5
src/arena.c
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@@ -116,6 +116,11 @@ void* arena_calloc(arena_t* a, size_t nmemb, size_t size)
void* arena_realloc_tail(arena_t* a, size_t len) void* arena_realloc_tail(arena_t* a, size_t len)
{ {
if (len <= (a->head->offset - a->head->prev_offset)) {
a->head->offset = a->head->prev_offset + len;
return (byte_t*)(a->head->data) + a->head->prev_offset;
}
if (a->head->offset == BIG_PAGE) { if (a->head->offset == BIG_PAGE) {
void* tmp = realloc(a->head->data, len); void* tmp = realloc(a->head->data, len);