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BlockchainLMDB: Add batch transaction support to tx_exists()

This commit is contained in:
warptangent 2015-02-10 20:01:02 -08:00
parent 8529c0ea9a
commit 83fb6d8d07
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GPG Key ID: 0E490BEBFBE4E92D
1 changed files with 11 additions and 8 deletions
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19
src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
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@ -1132,20 +1132,23 @@ bool BlockchainLMDB::tx_exists(const crypto::hash& h) const
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (m_batch_active)
{
LOG_PRINT_L0("WARNING: active batch transaction while creating a read-only txn in tx_exists()");
}
txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(txn, m_txs, &key, &result);
auto get_result = mdb_get(*txn_ptr, m_txs, &key, &result);
if (get_result == MDB_NOTFOUND)
{
txn.commit();
if (! m_batch_active)
txn.commit();
LOG_PRINT_L1("transaction with hash " << epee::string_tools::pod_to_hex(h) << " not found in db");
return false;
}