hackhack.zig

const FreeList = linked_list.SinglyLinkedList([]u8);

fn consumeUnusedNode(self: *Self) !*FreeList.Node {
    if (self.unused_nodes.first == null) {
        // var bytes = try self.backing_allocator.alignedAlloc(u8, page_size, self.page_size);
        var bytes = try self.backing_allocator.reallocFn(self.backing_allocator, []u8{}, 1, self.page_size, page_size);
        const node_memsize = bytes.len - (bytes.len % @sizeOf(FreeList.Node));

        // Small leak due to misalignment. Can't do anything about it...
        bytes = bytes[0..node_memsize];
        const buffer = @bytesToSlice(FreeList.Node, bytes);

        std.debug.assert(buffer.len > 0);
        for (buffer) |*node| {
            self.unused_nodes.prepend(node); // this breaks
        }
    }
}