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improve static allocation

This commit is contained in:
Daan 2024-05-16 19:16:44 -07:00
parent aa91fe0f1c
commit 97013ee2b4
1 changed files with 3 additions and 2 deletions
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5
src/arena.c
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@ -147,12 +147,13 @@ static _Atomic(size_t) mi_arena_static_top;
static void* mi_arena_static_zalloc(size_t size, size_t alignment, mi_memid_t* memid) {
*memid = _mi_memid_none();
if (size == 0 || size > MI_ARENA_STATIC_MAX) return NULL;
if ((mi_atomic_load_relaxed(&mi_arena_static_top) + size) > MI_ARENA_STATIC_MAX) return NULL;
const size_t toplow = mi_atomic_load_relaxed(&mi_arena_static_top);
if ((toplow + size) > MI_ARENA_STATIC_MAX) return NULL;
// try to claim space
if (alignment == 0) { alignment = 1; }
const size_t oversize = size + alignment - 1;
if (oversize > MI_ARENA_STATIC_MAX) return NULL;
if (toplow + oversize > MI_ARENA_STATIC_MAX) return NULL;
const size_t oldtop = mi_atomic_add_acq_rel(&mi_arena_static_top, oversize);
size_t top = oldtop + oversize;
if (top > MI_ARENA_STATIC_MAX) {