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Move mdb_txn_safe implementation to cpp file

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This commit is contained in:
Thomas Winget 2015-05-15 20:42:47 -04:00
parent 21a72bd47b
commit ac79502308
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GPG key ID: 58131A160789E630
2 changed files with 58 additions and 51 deletions
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54
src/blockchain_db/lmdb/db_lmdb.cpp
View file

@ -148,6 +148,60 @@ inline void lmdb_db_open(MDB_txn* txn, const char* name, int flags, MDB_dbi& dbi
namespace cryptonote namespace cryptonote
{ {
mdb_txn_safe::mdb_txn_safe() : m_txn(NULL) { }
mdb_txn_safe::~mdb_txn_safe()
{
LOG_PRINT_L3("mdb_txn_safe: destructor");
if (m_txn != NULL)
{
if (m_batch_txn) // this is a batch txn and should have been handled before this point for safety
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: m_txn is a batch txn and it's not NULL in destructor - calling mdb_txn_abort()");
}
else
{
// Example of when this occurs: a lookup fails, so a read-only txn is
// aborted through this destructor. However, successful read-only txns
// ideally should have been committed when done and not end up here.
//
// NOTE: not sure if this is ever reached for a non-batch write
// transaction, but it's probably not ideal if it did.
LOG_PRINT_L3("mdb_txn_safe: m_txn not NULL in destructor - calling mdb_txn_abort()");
}
mdb_txn_abort(m_txn);
}
}
void mdb_txn_safe::commit(std::string message)
{
if (message.size() == 0)
{
message = "Failed to commit a transaction to the db";
}
if (mdb_txn_commit(m_txn))
{
m_txn = NULL;
LOG_PRINT_L0(message);
throw DB_ERROR(message.c_str());
}
m_txn = NULL;
}
void mdb_txn_safe::abort()
{
LOG_PRINT_L3("mdb_txn_safe: abort()");
if(m_txn != NULL)
{
mdb_txn_abort(m_txn);
m_txn = NULL;
}
else
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: abort() called, but m_txn is NULL");
}
}
// If m_batch_active is set, a batch transaction exists beyond this class, such // If m_batch_active is set, a batch transaction exists beyond this class, such
// as a batch import with verification enabled, or possibly (later) a batch // as a batch import with verification enabled, or possibly (later) a batch

55
src/blockchain_db/lmdb/db_lmdb.h
View file

@ -36,63 +36,16 @@ namespace cryptonote
struct mdb_txn_safe struct mdb_txn_safe
{ {
mdb_txn_safe() : m_txn(NULL) { } mdb_txn_safe();
~mdb_txn_safe() ~mdb_txn_safe();
{
LOG_PRINT_L3("mdb_txn_safe: destructor");
if (m_txn != NULL)
{
if (m_batch_txn) // this is a batch txn and should have been handled before this point for safety
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: m_txn is a batch txn and it's not NULL in destructor - calling mdb_txn_abort()");
}
else
{
// Example of when this occurs: a lookup fails, so a read-only txn is
// aborted through this destructor. However, successful read-only txns
// ideally should have been committed when done and not end up here.
//
// NOTE: not sure if this is ever reached for a non-batch write
// transaction, but it's probably not ideal if it did.
LOG_PRINT_L3("mdb_txn_safe: m_txn not NULL in destructor - calling mdb_txn_abort()");
}
mdb_txn_abort(m_txn);
}
}
void commit(std::string message = "") void commit(std::string message = "");
{
if (message.size() == 0)
{
message = "Failed to commit a transaction to the db";
}
if (mdb_txn_commit(m_txn))
{
m_txn = NULL;
LOG_PRINT_L0(message);
throw DB_ERROR(message.c_str());
}
m_txn = NULL;
}
// This should only be needed for batch transaction which must be ensured to // This should only be needed for batch transaction which must be ensured to
// be aborted before mdb_env_close, not after. So we can't rely on // be aborted before mdb_env_close, not after. So we can't rely on
// BlockchainLMDB destructor to call mdb_txn_safe destructor, as that's too late // BlockchainLMDB destructor to call mdb_txn_safe destructor, as that's too late
// to properly abort, since mdb_env_close would have been called earlier. // to properly abort, since mdb_env_close would have been called earlier.
void abort() void abort();
{
LOG_PRINT_L3("mdb_txn_safe: abort()");
if(m_txn != NULL)
{
mdb_txn_abort(m_txn);
m_txn = NULL;
}
else
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: abort() called, but m_txn is NULL");
}
}
operator MDB_txn*() operator MDB_txn*()
{ {