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Cursors refactoring part one
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Blue 2024-12-25 19:19:32 +02:00
parent ef86d0adf9
commit bfb1d007ad
Signed by: blue
GPG key ID: 9B203B252A63EE38
19 changed files with 824 additions and 677 deletions
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84
src/storage.hpp
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@ -46,7 +46,7 @@
*/
template<class K, class V>
LMDBAL::Storage<K, V>::Storage(Base* parent, const std::string& name, bool duplicates):
iStorage(parent, name, duplicates),
StorageCommon(parent, name, duplicates),
keySerializer(),
valueSerializer(),
cursors()
@ -1015,7 +1015,7 @@ void LMDBAL::Storage<K, V>::close() {
for (const std::pair<const uint32_t, Cursor<K, V>*>& pair : cursors)
pair.second->terminated();
iStorage::close();
StorageCommon::close();
}
/**
@ -1051,7 +1051,7 @@ void LMDBAL::Storage<K, V>::destroyCursor(LMDBAL::Cursor<K, V>& cursor) {
cursor.close();
cursors.erase(itr);
cursor.freed();
cursor.reset();
}
/**
@ -1103,81 +1103,3 @@ void LMDBAL::Storage<K, V>::discoveredRecord(const K& key, const V& value, Trans
UNUSED(value);
UNUSED(txn);
}
/**
* \brief A functiion to actually open <a class="el" href="http://www.lmdb.tech/doc/group__mdb.html#gadbe68a06c448dfb62da16443d251a78b">MDB_dbi</a> storage
*
* \tparam K type of keys in opening storage
*
* \param[in] transaction - lmdb transaction to call <a class="el" href="http://www.lmdb.tech/doc/group__mdb.html#gac08cad5b096925642ca359a6d6f0562a">mdb_dbi_open</a>, must be a writable transaction!
* \param[in] duplicates - true if key duplicates are allowed (false by default)
*
* \returns MDB_SUCCESS if everything went smooth or MDB_<error> -like error code
*
* This is a way to optimise database using MDB_INTEGERKEY flag,
* when the key is actually kind of an integer
* This infrastructure also allowes us to customize mdb_dbi_open call in the future
*/
template<class K, class V>
inline int LMDBAL::iStorage::makeStorage(MDB_txn* transaction, bool duplicates) {
unsigned int flags = MDB_CREATE;
if constexpr (std::is_integral<K>::value)
flags |= MDB_INTEGERKEY;
if (duplicates) {
flags |= MDB_DUPSORT;
if constexpr (std::is_scalar<V>::value)
flags |= MDB_DUPFIXED;
if constexpr (
std::is_same<V, uint32_t>::value ||
std::is_same<V, int32_t>::value ||
std::is_same<V, uint64_t>::value ||
std::is_same<V, int64_t>::value
) //for some reason lmdb breaks if it's not one of these types in MDB_DUPFIXED mode
flags |= MDB_INTEGERDUP;
}
return _mdbOpen(transaction, flags);
}
/**
* \brief A method to cast a value (which can be a value or a key) to string.
*
* This function is mainly used in exceptions, to report which key was duplicated or not found.
* You can define your own specializations to this function in case std::to_string doesn't cover your case
*
* \param[in] value a value that should be converted to string
* \returns a string presentation of value
*/
template<class T>
inline std::string LMDBAL::iStorage::toString(const T& value) {
return std::to_string(value);
}
/**
* \brief A method to cast a value (which can be a value or a key) to string.
*
* QString spectialization
*
* \param[in] value a value that should be converted to string
* \returns a string presentation of value
*/
template<>
inline std::string LMDBAL::iStorage::toString(const QString& value) {
return value.toStdString();
}
/**
* \brief A method to cast a value (which can be a value or a key) to string.
*
* std::string spectialization
*
* \param[in] value a value that should be converted to string
* \returns a string presentation of value
*/
template<>
inline std::string LMDBAL::iStorage::toString(const std::string& value) {
return value;
}