Catching up and safely committing an index

501}
502
503void BaseIndex::SetBestBlockIndex(const CBlockIndex* block)
504{
505    assert(!m_chainstate->m_blockman.IsPruneMode() || AllowPrune());
506
507    if (AllowPrune()) {
508        node::PruneLockInfo prune_lock;
509        prune_lock.height_first = block ? block->nHeight : 0;
510        WITH_LOCK(::cs_main, m_chainstate->m_blockman.UpdatePruneLock(GetName(), prune_lock));
511    }
512
513    // Intentionally set m_best_block_index as the last step in this function,
514    // after updating prune locks above, and after making any other references
515    // to *this, so the BlockUntilSyncedToCurrentChain function (which checks
516    // m_best_block_index as an optimization) can be used to wait for the last
517    // BlockConnected notification and safely assume that prune locks are
518    // updated and that the index object is safe to delete.
519    m_best_block_index = block;
520}
521