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Use cursors in some remove functions 

Helps when they're called repeatedly in one txn
This commit is contained in:
Howard Chu 2016-03-31 20:55:16 +01:00
parent 118dd69dd5
commit b2f1c58805
1 changed files with 33 additions and 7 deletions
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40
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -625,6 +625,8 @@ void BlockchainLMDB::remove_block()
mdb_txn_cursors *m_cursors = &m_wcursors;
CURSOR(block_info)
CURSOR(block_heights)
CURSOR(blocks)
MDB_val_copy<uint64_t> k(m_height - 1);
MDB_val h = k;
if ((result = mdb_cursor_get(m_cur_block_info, (MDB_val *)&zerokval, &h, MDB_GET_BOTH)))
@ -635,10 +637,14 @@ void BlockchainLMDB::remove_block()
blk_height bh = {bi->bi_hash, 0};
h.mv_data = (void *)&bh;
h.mv_size = sizeof(bh);
if ((result = mdb_del(*m_write_txn, m_block_heights, (MDB_val *)&zerokval, &h)))
if ((result = mdb_cursor_get(m_cur_block_heights, (MDB_val *)&zerokval, &h, MDB_GET_BOTH)))
throw1(DB_ERROR(lmdb_error("Failed to locate block height by hash for removal: ", result).c_str()));
if ((result = mdb_cursor_del(m_cur_block_heights, 0)))
throw1(DB_ERROR(lmdb_error("Failed to add removal of block height by hash to db transaction: ", result).c_str()));
if ((result = mdb_del(*m_write_txn, m_blocks, &k, NULL)))
if ((result = mdb_cursor_get(m_cur_blocks, &k, NULL, MDB_SET)))
throw1(DB_ERROR(lmdb_error("Failed to locate block for removal: ", result).c_str()));
if ((result = mdb_cursor_del(m_cur_blocks, 0)))
throw1(DB_ERROR(lmdb_error("Failed to add removal of block to db transaction: ", result).c_str()));
if ((result = mdb_cursor_del(m_cur_block_info, 0)))
@ -699,6 +705,8 @@ void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash, const
mdb_txn_cursors *m_cursors = &m_wcursors;
CURSOR(tx_indices)
CURSOR(txs)
CURSOR(tx_outputs)
txindex ti = {tx_hash};
MDB_val val_h = {sizeof(ti), (void *)&ti};
@ -709,16 +717,25 @@ void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash, const
uint64_t tx_index = tip->data.tx_index;
MDB_val_copy<uint64_t> val_tx_index(tx_index);
if ((result = mdb_del(*m_write_txn, m_txs, &val_tx_index, NULL)))
if ((result = mdb_cursor_get(m_cur_txs, &val_tx_index, NULL, MDB_SET)))
throw1(DB_ERROR(lmdb_error("Failed to locate tx for removal: ", result).c_str()));
result = mdb_cursor_del(m_cur_txs, 0);
if (result)
throw1(DB_ERROR(lmdb_error("Failed to add removal of tx to db transaction: ", result).c_str()));
remove_tx_outputs(tx_index, tx);
result = mdb_del(*m_write_txn, m_tx_outputs, &val_tx_index, NULL);
result = mdb_cursor_get(m_cur_tx_outputs, &val_tx_index, NULL, MDB_SET);
if (result == MDB_NOTFOUND)
LOG_PRINT_L1("tx has no outputs to remove: " << tx_hash);
else if (result)
throw1(DB_ERROR(lmdb_error("Failed to add removal of tx outputs to db transaction: ", result).c_str()));
throw1(DB_ERROR(lmdb_error("Failed to locate tx outputs for removal: ", result).c_str()));
if (!result)
{
result = mdb_cursor_del(m_cur_tx_outputs, 0);
if (result)
throw1(DB_ERROR(lmdb_error("Failed to add removal of tx outputs to db transaction: ", result).c_str()));
}
// Though other things could change, so long as earlier functions (like
// remove_tx_outputs) need to do the lookup of tx hash -> tx index, don't
@ -906,11 +923,20 @@ void BlockchainLMDB::remove_spent_key(const crypto::key_image& k_image)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_cursors *m_cursors = &m_wcursors;
CURSOR(spent_keys)
MDB_val k = {sizeof(k_image), (void *)&k_image};
auto result = mdb_del(*m_write_txn, m_spent_keys, (MDB_val *)&zerokval, &k);
auto result = mdb_cursor_get(m_cur_spent_keys, (MDB_val *)&zerokval, &k, MDB_GET_BOTH);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR(lmdb_error("Error adding removal of key image to db transaction", result).c_str()));
throw1(DB_ERROR(lmdb_error("Error finding spent key to remove", result).c_str()));
if (!result)
{
result = mdb_cursor_del(m_cur_spent_keys, 0);
if (result)
throw1(DB_ERROR(lmdb_error("Error adding removal of key image to db transaction", result).c_str()));
}
}
blobdata BlockchainLMDB::output_to_blob(const tx_out& output) const