|
private mdb_get ( |
||
| txn | ||
| dbi | uint | |
| key | LightningDB.Native.ValueStructure | |
| data | LightningDB.Native.ValueStructure | |
| return | int | |
public static int mdb_get(IntPtr txn, uint dbi, byte[] key, out byte[] data)
{
using (var marshal = new MarshalValueStructure(key))
{
ValueStructure value;
var result = checkRead(LmdbMethods.mdb_get(txn, dbi, ref marshal.Key, out value));
if (result == MDB_NOTFOUND)
{
data = null;
return(result);
}
data = value.GetBytes();
return(result);
}
}
public static unsafe int mdb_get(IntPtr txn, uint dbi, ReadOnlySpan <byte> key, out Span <byte> data)
{
fixed(byte *addKey = &key.GetPinnableReference())
{
var keyVs = new ValueStructure
{
size = new IntPtr(key.Length),
data = new IntPtr(addKey),
};
ValueStructure value;
var result = checkRead(LmdbMethods.mdb_get(txn, dbi, ref keyVs, out value));
if (result == MDB_NOTFOUND)
{
data = Span <byte> .Empty;
return(result);
}
data = new Span <byte>(value.data.ToPointer(), value.size.ToInt32());
return(result);
}
}
public static MDBResultCode mdb_get(IntPtr txn, uint dbi, ref MDBValue key, out MDBValue value)
{
return(LmdbMethods.mdb_get(txn, dbi, ref key, out value));
}
