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BlockchainDB/LMDB: Refactor block-scope DB txn handling for add block 

Move block-scope txn start and stop from BlockchainLMDB to BlockchainDB.
This commit is contained in:
warptangent 2016-02-08 08:32:36 -08:00
parent f3a6000094
commit fd46c96dce
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GPG Key ID: 0E490BEBFBE4E92D
2 changed files with 10 additions and 20 deletions
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10
src/blockchain_db/blockchain_db.cpp
View File

@ -99,6 +99,8 @@ uint64_t BlockchainDB::add_block( const block& blk
, const std::vector<transaction>& txs
)
{
block_txn_start();
TIME_MEASURE_START(time1);
crypto::hash blk_hash = get_block_hash(blk);
TIME_MEASURE_FINISH(time1);
@ -125,9 +127,15 @@ uint64_t BlockchainDB::add_block( const block& blk
TIME_MEASURE_FINISH(time1);
time_add_transaction += time1;
// DB's new height based on this added block is only incremented after this
// function returns, so height() here returns the new previous height.
uint64_t prev_height = height();
block_txn_stop();
++num_calls;
return height();
return prev_height;
}
void BlockchainDB::pop_block(block& blk, std::vector<transaction>& txs)

20
src/blockchain_db/lmdb/db_lmdb.cpp
View File

@ -2244,33 +2244,15 @@ uint64_t BlockchainLMDB::add_block(const block& blk, const size_t& block_size, c
}
}
mdb_txn_safe txn;
if (! m_batch_active)
{
if (auto mdb_res = mdb_txn_begin(m_env, NULL, 0, txn))
throw0(DB_ERROR(lmdb_error("Failed to create a transaction for the db: ", mdb_res).c_str()));
m_write_txn = &txn;
}
uint64_t num_outputs = m_num_outputs;
try
{
BlockchainDB::add_block(blk, block_size, cumulative_difficulty, coins_generated, txs);
if (! m_batch_active)
{
m_write_txn = NULL;
TIME_MEASURE_START(time1);
txn.commit();
TIME_MEASURE_FINISH(time1);
time_commit1 += time1;
}
}
catch (...)
{
m_num_outputs = num_outputs;
if (! m_batch_active)
m_write_txn = NULL;
block_txn_abort();
throw;
}