internal void ConfigureDatabase(LightningTransaction tx, LightningDatabase db)
{
if (_comparer != null)
{
mdb_set_compare(tx.Handle(), db.Handle(), Compare);
}
if (_duplicatesComparer != null)
{
mdb_set_dupsort(tx.Handle(), db.Handle(), IsDuplicate);
}
}
/// <summary>
/// Creates new instance of LightningCursor
/// </summary>
/// <param name="db">Database</param>
/// <param name="txn">Transaction</param>
internal LightningCursor(LightningDatabase db, LightningTransaction txn)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
if (txn == null)
{
throw new ArgumentNullException(nameof(txn));
}
_currentWithOptimizedPair = () => _currentPair;
_currentDefault = () =>
{
if (_currentKeyStructure.size == IntPtr.Zero)
{
return(default(KeyValuePair <byte[], byte[]>));
}
return(new KeyValuePair <byte[], byte[]>(_currentKeyStructure.GetBytes(),
_currentValueStructure.GetBytes()));
};
_getCurrent = _currentDefault;
mdb_cursor_open(txn.Handle(), db.Handle(), out _handle);
Database = db;
Transaction = txn;
Transaction.Disposing += Dispose;
}
/// <summary>
/// The number of items in the database.
/// </summary>
/// <param name="db">The database we are counting items in.</param>
/// <returns>The number of items.</returns>
public long GetEntriesCount(LightningDatabase db)
{
MDBStat stat;
mdb_stat(_handle, db.Handle(), out stat);
return(stat.ms_entries.ToInt64());
}
internal IDisposable ConfigureDatabase(LightningTransaction tx, LightningDatabase db)
{
var pinnedComparer = new ComparerKeepAlive();
if (_comparer != null)
{
CompareFunction compare = Compare;
pinnedComparer.AddComparer(compare);
mdb_set_compare(tx.Handle(), db.Handle(), compare);
}
if (_duplicatesComparer != null)
{
CompareFunction dupCompare = IsDuplicate;
pinnedComparer.AddComparer(dupCompare);
mdb_set_dupsort(tx.Handle(), db.Handle(), dupCompare);
}
return pinnedComparer;
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
public unsafe MDBResultCode Delete(LightningDatabase db, ReadOnlySpan <byte> key)
{
fixed(byte *ptr = key)
{
var mdbKey = new MDBValue(key.Length, ptr);
return(mdb_del(_handle, db.Handle(), mdbKey));
}
}
internal IDisposable ConfigureDatabase(LightningTransaction tx, LightningDatabase db)
{
var pinnedComparer = new ComparerKeepAlive();
if (_comparer != null)
{
CompareFunction compare = Compare;
pinnedComparer.AddComparer(compare);
mdb_set_compare(tx.Handle(), db.Handle(), compare);
}
if (_duplicatesComparer != null)
{
CompareFunction dupCompare = IsDuplicate;
pinnedComparer.AddComparer(dupCompare);
mdb_set_dupsort(tx.Handle(), db.Handle(), dupCompare);
}
return(pinnedComparer);
}
/// <summary>
/// Put data into a database.
/// </summary>
/// <param name="db">Database.</param>
/// <param name="key">Key byte array.</param>
/// <param name="value">Value byte array.</param>
/// <param name="options">Operation options (optional).</param>
public void Put(LightningDatabase db, byte[] key, byte[] value, PutOptions options = PutOptions.None)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
mdb_put(_handle, db.Handle(), key, value, options);
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
/// <param name="value">The data to delete (optional)</param>
public void Delete(LightningDatabase db, byte[] key, byte[] value)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
mdb_del(_handle, db.Handle(), key, value);
}
/// <summary>
/// Tries to get a value by its key.
/// </summary>
/// <param name="db">Database.</param>
/// <param name="key">Key byte array.</param>
/// <param name="value">Value byte array if exists.</param>
/// <returns>True if key exists, false if not.</returns>
public bool TryGet(LightningDatabase db, byte[] key, out byte[] value)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
return(mdb_get(_handle, db.Handle(), key, out value) != MDB_NOTFOUND);
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
/// <param name="value">The data to delete (optional)</param>
public unsafe MDBResultCode Delete(LightningDatabase db, ReadOnlySpan <byte> key, ReadOnlySpan <byte> value)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
fixed(byte *keyPtr = key)
fixed(byte *valuePtr = value)
{
var mdbKey = new MDBValue(key.Length, keyPtr);
if (value == null)
{
return(mdb_del(_handle, db.Handle(), mdbKey));
}
var mdbValue = new MDBValue(value.Length, valuePtr);
return(mdb_del(_handle, db.Handle(), mdbKey, mdbValue));
}
}
/// <summary>
/// Get value from a database.
/// </summary>
/// <param name="db">The database to query.</param>
/// <param name="key">A span containing the key to look up.</param>
/// <returns>Requested value's byte array if exists, or null if not.</returns>
public unsafe (MDBResultCode resultCode, MDBValue key, MDBValue value) Get(LightningDatabase db, ReadOnlySpan <byte> key)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
fixed(byte *keyBuffer = key)
{
var mdbKey = new MDBValue(key.Length, keyBuffer);
return(mdb_get(_handle, db.Handle(), ref mdbKey, out var mdbValue), mdbKey, mdbValue);
}
}
/// <summary>
/// Put data into a database.
/// </summary>
/// <param name="db">Database.</param>
/// <param name="key">Key byte array.</param>
/// <param name="value">Value byte array.</param>
/// <param name="options">Operation options (optional).</param>
public unsafe MDBResultCode Put(LightningDatabase db, ReadOnlySpan <byte> key, ReadOnlySpan <byte> value, PutOptions options = PutOptions.None)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
fixed(byte *keyPtr = key)
fixed(byte *valuePtr = value)
{
var mdbKey = new MDBValue(key.Length, keyPtr);
var mdbValue = new MDBValue(value.Length, valuePtr);
return(mdb_put(_handle, db.Handle(), mdbKey, mdbValue, options));
}
}
/// <summary>
/// Creates new instance of LightningCursor
/// </summary>
/// <param name="db">Database</param>
/// <param name="txn">Transaction</param>
internal LightningCursor(LightningDatabase db, LightningTransaction txn)
{
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
if (txn == null)
{
throw new ArgumentNullException(nameof(txn));
}
mdb_cursor_open(txn.Handle(), db.Handle(), out _handle).ThrowOnError();
Transaction = txn;
Transaction.Disposing += Dispose;
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
/// <param name="value">The data to delete (optional)</param>
public void Delete(LightningDatabase db, byte[] key, byte[] value)
{
if (db == null)
throw new ArgumentNullException(nameof(db));
mdb_del(_handle, db.Handle(), key, value);
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
public void Delete(LightningDatabase db, byte[] key)
{
mdb_del(_handle, db.Handle(), key);
}
/// <summary>
/// The number of items in the database.
/// </summary>
/// <param name="db">The database we are counting items in.</param>
/// <returns>The number of items.</returns>
public long GetEntriesCount(LightningDatabase db)
{
MDBStat stat;
mdb_stat(_handle, db.Handle(), out stat);
return stat.ms_entries.ToInt64();
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="db">A database handle returned by mdb_dbi_open()</param>
/// <param name="key">The key to delete from the database</param>
public void Delete(LightningDatabase db, byte[] key)
{
mdb_del(_handle, db.Handle(), key);
}
public MDBStat GetStats(LightningDatabase db)
{
MDBStat stat;
mdb_stat(_handle, db.Handle(), out stat);
return stat;
}
/// <summary>
/// Put data into a database.
/// </summary>
/// <param name="db">Database.</param>
/// <param name="key">Key byte array.</param>
/// <param name="value">Value byte array.</param>
/// <param name="options">Operation options (optional).</param>
public void Put(LightningDatabase db, byte[] key, byte[] value, PutOptions options = PutOptions.None)
{
if (db == null)
throw new ArgumentNullException(nameof(db));
mdb_put(_handle, db.Handle(), key, value, options);
}
/// <summary>
/// Tries to get a value by its key.
/// </summary>
/// <param name="db">Database.</param>
/// <param name="key">Key byte array.</param>
/// <param name="value">Value byte array if exists.</param>
/// <returns>True if key exists, false if not.</returns>
public bool TryGet(LightningDatabase db, byte[] key, out byte[] value)
{
if (db == null)
throw new ArgumentNullException(nameof(db));
return mdb_get(_handle, db.Handle(), key, out value) != MDB_NOTFOUND;
}
/// <summary>
/// The number of items in the database.
/// </summary>
/// <param name="db">The database we are counting items in.</param>
/// <returns>The number of items.</returns>
public long GetEntriesCount(LightningDatabase db)
{
mdb_stat(_handle, db.Handle(), out var stat).ThrowOnError();
return(stat.ms_entries.ToInt64());
}