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Get rid of lmdb_cur

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We don't need it now with per-txn cursors.
This commit is contained in:
Howard Chu 2016-03-03 19:06:27 +00:00
parent a7310031f4
commit ee7a8b87f9
1 changed files with 14 additions and 57 deletions
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71
src/blockchain_db/lmdb/db_lmdb.cpp
View file

@ -65,45 +65,6 @@ inline void throw1(const T &e)
throw e;
}
// cursor needs to be closed when it goes out of scope,
// this helps if the function using it throws
struct lmdb_cur
{
lmdb_cur(MDB_txn* txn, MDB_dbi dbi)
{
if (mdb_cursor_open(txn, dbi, &m_cur))
throw0(cryptonote::DB_ERROR("Error opening db cursor"));
done = false;
}
~lmdb_cur()
{
close();
}
operator MDB_cursor*()
{
return m_cur;
}
operator MDB_cursor**()
{
return &m_cur;
}
void close()
{
if (!done)
{
mdb_cursor_close(m_cur);
done = true;
}
}
private:
MDB_cursor* m_cur;
bool done;
};
template<typename T>
struct MDB_val_copy: public MDB_val
{
@ -776,12 +737,12 @@ void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash, const transa
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
lmdb_cur cur(*m_write_txn, m_tx_outputs);
mdb_txn_cursors *m_cursors = &m_wcursors;
MDB_val_copy<crypto::hash> k(tx_hash);
MDB_val v;
CURSOR(tx_outputs)
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
auto result = mdb_cursor_get(m_cur_tx_outputs, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L2("tx has no outputs, so no global output indices");
@ -793,9 +754,9 @@ void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash, const transa
else
{
mdb_size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_count(m_cur_tx_outputs, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_LAST_DUP);
mdb_cursor_get(m_cur_tx_outputs, &k, &v, MDB_LAST_DUP);
for (uint64_t i = num_elems; i > 0; --i)
{
@ -803,12 +764,10 @@ void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash, const transa
remove_output(*(const uint64_t*)v.mv_data, tx_output.amount);
if (i > 1)
{
mdb_cursor_get(cur, &k, &v, MDB_PREV_DUP);
mdb_cursor_get(m_cur_tx_outputs, &k, &v, MDB_PREV_DUP);
}
}
}
cur.close();
}
// TODO: probably remove this function
@ -864,29 +823,29 @@ void BlockchainLMDB::remove_amount_output_index(const uint64_t amount, const uin
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
lmdb_cur cur(*m_write_txn, m_output_amounts);
mdb_txn_cursors *m_cursors = &m_wcursors;
CURSOR(output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
auto result = mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
mdb_size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_count(m_cur_output_amounts, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_LAST_DUP);
mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_LAST_DUP);
uint64_t amount_output_index = 0;
uint64_t goi = 0;
bool found_index = false;
for (uint64_t i = num_elems; i > 0; --i)
{
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_GET_CURRENT);
goi = *(const uint64_t *)v.mv_data;
if (goi == global_output_index)
{
@ -895,23 +854,21 @@ void BlockchainLMDB::remove_amount_output_index(const uint64_t amount, const uin
break;
}
if (i > 1)
mdb_cursor_get(cur, &k, &v, MDB_PREV_DUP);
mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_PREV_DUP);
}
if (found_index)
{
// found the amount output index
// now delete it
result = mdb_cursor_del(cur, 0);
result = mdb_cursor_del(m_cur_output_amounts, 0);
if (result)
throw0(DB_ERROR(std::string("Error deleting amount output index ").append(boost::lexical_cast<std::string>(amount_output_index)).c_str()));
}
else
{
// not found
cur.close();
throw1(OUTPUT_DNE("Failed to find amount output index"));
}
cur.close();
}
void BlockchainLMDB::add_spent_key(const crypto::key_image& k_image)