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Small cleanups

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Only one return and TXN_POSTFIX_RDONLY() per function
Only log rtxn_start if the rtxn wasn't already active
This commit is contained in:
Howard Chu 2016-03-15 10:43:52 +00:00
parent 01c1512f22
commit 6b0a903177
1 changed files with 31 additions and 27 deletions
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58
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -1347,19 +1347,20 @@ bool BlockchainLMDB::block_exists(const crypto::hash& h) const
TXN_PREFIX_RDONLY(); TXN_PREFIX_RDONLY();
RCURSOR(block_heights); RCURSOR(block_heights);
bool ret = false;
MDB_val_copy<crypto::hash> key(h); MDB_val_copy<crypto::hash> key(h);
auto get_result = mdb_cursor_get(m_cur_block_heights, &key, NULL, MDB_SET); auto get_result = mdb_cursor_get(m_cur_block_heights, &key, NULL, MDB_SET);
if (get_result == MDB_NOTFOUND) if (get_result == MDB_NOTFOUND)
{ {
TXN_POSTFIX_RDONLY();
LOG_PRINT_L3("Block with hash " << epee::string_tools::pod_to_hex(h) << " not found in db"); LOG_PRINT_L3("Block with hash " << epee::string_tools::pod_to_hex(h) << " not found in db");
return false;
} }
else if (get_result) else if (get_result)
throw0(DB_ERROR(lmdb_error("DB error attempting to fetch block index from hash", get_result).c_str())); throw0(DB_ERROR(lmdb_error("DB error attempting to fetch block index from hash", get_result).c_str()));
else
ret = true;
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
return true; return ret;
} }
block BlockchainLMDB::get_block(const crypto::hash& h) const block BlockchainLMDB::get_block(const crypto::hash& h) const
@ -1656,15 +1657,17 @@ bool BlockchainLMDB::tx_exists(const crypto::hash& h) const
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
bool ret = false;
if (get_result == MDB_NOTFOUND) if (get_result == MDB_NOTFOUND)
{ {
LOG_PRINT_L1("transaction with hash " << epee::string_tools::pod_to_hex(h) << " not found in db"); LOG_PRINT_L1("transaction with hash " << epee::string_tools::pod_to_hex(h) << " not found in db");
return false;
} }
else if (get_result) else if (get_result)
throw0(DB_ERROR(lmdb_error("DB error attempting to fetch transaction from hash", get_result).c_str())); throw0(DB_ERROR(lmdb_error("DB error attempting to fetch transaction from hash", get_result).c_str()));
else
ret = true;
return true; return ret;
} }
uint64_t BlockchainLMDB::get_tx_unlock_time(const crypto::hash& h) const uint64_t BlockchainLMDB::get_tx_unlock_time(const crypto::hash& h) const
@ -1779,17 +1782,14 @@ uint64_t BlockchainLMDB::get_num_outputs(const uint64_t& amount) const
MDB_val_copy<uint64_t> k(amount); MDB_val_copy<uint64_t> k(amount);
MDB_val v; MDB_val v;
auto result = mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
{
TXN_POSTFIX_RDONLY();
return 0;
}
else if (result)
throw0(DB_ERROR("DB error attempting to get number of outputs of an amount"));
mdb_size_t num_elems = 0; mdb_size_t num_elems = 0;
mdb_cursor_count(m_cur_output_amounts, &num_elems); auto result = mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_SET);
if (result == MDB_SUCCESS)
{
mdb_cursor_count(m_cur_output_amounts, &num_elems);
}
else if (result != MDB_NOTFOUND)
throw0(DB_ERROR("DB error attempting to get number of outputs of an amount"));
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
@ -1985,15 +1985,15 @@ bool BlockchainLMDB::has_key_image(const crypto::key_image& img) const
TXN_PREFIX_RDONLY(); TXN_PREFIX_RDONLY();
RCURSOR(spent_keys); RCURSOR(spent_keys);
bool ret = false;
MDB_val_copy<crypto::key_image> val_key(img); MDB_val_copy<crypto::key_image> val_key(img);
if (mdb_cursor_get(m_cur_spent_keys, &val_key, NULL, MDB_SET) == 0) if (mdb_cursor_get(m_cur_spent_keys, &val_key, NULL, MDB_SET) == 0)
{ {
TXN_POSTFIX_RDONLY(); ret = true;
return true;
} }
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
return false; return ret;
} }
bool BlockchainLMDB::for_all_key_images(std::function<bool(const crypto::key_image&)> f) const bool BlockchainLMDB::for_all_key_images(std::function<bool(const crypto::key_image&)> f) const
@ -2282,7 +2282,8 @@ bool BlockchainLMDB::block_rtxn_start(MDB_txn **mtxn, mdb_txn_cursors **mcur) co
*mtxn = m_tinfo->m_ti_rtxn; *mtxn = m_tinfo->m_ti_rtxn;
*mcur = &m_tinfo->m_ti_rcursors; *mcur = &m_tinfo->m_ti_rcursors;
LOG_PRINT_L3("BlockchainLMDB::" << __func__); if (ret)
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
return ret; return ret;
} }
@ -2738,18 +2739,21 @@ uint64_t BlockchainLMDB::get_hard_fork_starting_height(uint8_t version) const
MDB_val_copy<uint8_t> val_key(version); MDB_val_copy<uint8_t> val_key(version);
MDB_val val_ret; MDB_val val_ret;
auto result = mdb_get(m_txn, m_hf_starting_heights, &val_key, &val_ret);
if (result == MDB_NOTFOUND)
return std::numeric_limits<uint64_t>::max();
if (result)
throw0(DB_ERROR("Error attempting to retrieve a hard fork starting height from the db"));
uint64_t ret; uint64_t ret;
auto result = mdb_get(m_txn, m_hf_starting_heights, &val_key, &val_ret);
if (result == MDB_SUCCESS)
{
#ifdef MISALIGNED_OK #ifdef MISALIGNED_OK
ret = *(const uint64_t*)val_ret.mv_data; ret = *(const uint64_t*)val_ret.mv_data;
#else #else
memcpy(&ret, val_ret.mv_data, sizeof(uint64_t)); memcpy(&ret, val_ret.mv_data, sizeof(uint64_t));
#endif #endif
} else if (result == MDB_NOTFOUND)
{
ret = std::numeric_limits<uint64_t>::max();
} else if (result)
throw0(DB_ERROR(lmdb_error("Error attempting to retrieve a hard fork starting height from the db", result).c_str()));
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
return ret; return ret;
} }