Function cbm_arena_alloc

src/foundation/arena.c:58–76

}

void *cbm_arena_alloc(CBMArena *a, size_t n) {
    if (!a || n == 0) {
        return NULL;
    }
    /* 8-byte alignment */
    n = (n + ARENA_ALIGN) & ~(size_t)ARENA_ALIGN;
    if (a->nblocks == 0) {
        return NULL;
    }
    if (a->used + n > a->block_size) {
        if (!arena_grow(a, n)) {
            return NULL;
        }
    }
    char *ptr = a->blocks[a->nblocks - SKIP_ONE] + a->used;
    a->used += n;
    a->total_alloc += n;
    return ptr;
}

void *cbm_arena_calloc(CBMArena *a, size_t n) {
    void *p = cbm_arena_alloc(a, n);