namespace sf {

uint32_t g_index;
std::mutex g_mutex;

Bases *initBases(Bases *&self, Bases *parent)
{
	std::lock_guard<std::mutex> lg(g_mutex);

	if (self != nullptr) return self;

	uint32_t depth = parent ? parent->depth + 1 : 0;
	Bases *b = new Bases();
	b->depth = depth;
	b->index = ++g_index;
	memset(b->bases, 0, sizeof(b->bases));
	memcpy(b->bases, parent->bases, depth * sizeof(uint32_t));
	b->bases[depth] = b->index;

	std::atomic_thread_fence(std::memory_order_release);

	self = b;
	return b;
}

}