void RocksTransaction::recordSnapshotId() {
{
stdx::lock_guard<stdx::mutex> lk(_transactionEngine->_lock);
_cleanup_inlock();
_activeSnapshotsIter = _transactionEngine->_getLatestSnapshotId_inlock();
}
_snapshotId = *_activeSnapshotsIter;
_snapshotInitialized = true;
}
void RocksTransaction::recordSnapshotId() {
{
boost::mutex::scoped_lock lk(_transactionEngine->_lock);
_cleanup_inlock();
_activeSnapshotsIter = _transactionEngine->_getLatestSnapshotId_inlock();
}
_snapshotId = *_activeSnapshotsIter;
_snapshotInitialized = true;
}
void RocksTransaction::abort() {
if (_writtenKeys.empty() && !_snapshotInitialized) {
return;
}
{
stdx::lock_guard<stdx::mutex> lk(_transactionEngine->_lock);
for (const auto& key : _writtenKeys) {
_transactionEngine->_uncommittedTransactionId.erase(key);
}
_cleanup_inlock();
}
_writtenKeys.clear();
}
void RocksTransaction::commit() {
if (_writtenKeys.empty()) {
return;
}
uint64_t newSnapshotId = 0;
{
boost::mutex::scoped_lock lk(_transactionEngine->_lock);
for (const auto& key : _writtenKeys) {
invariant(!_transactionEngine->_isKeyCommittedAfterSnapshot_inlock(key, _snapshotId));
invariant(_transactionEngine->_uncommittedTransactionId[key] == _transactionId);
_transactionEngine->_uncommittedTransactionId.erase(key);
}
newSnapshotId = _transactionEngine->_latestSnapshotId + 1;
for (const auto& key : _writtenKeys) {
_transactionEngine->_registerCommittedKey_inlock(key, newSnapshotId);
}
_cleanup_inlock();
_transactionEngine->_latestSnapshotId = newSnapshotId;
}
// cleanup
_writtenKeys.clear();
}