public static unsafe void Put(this Transaction tx, Database db, Bufferable key, Bufferable value,
TransactionPutOptions flags = TransactionPutOptions.None)
{
fixed(byte *keyPtr = &key.Buffer[0], valPtr = &value.Buffer[0])
{
var keydb = new DirectBuffer(key.Buffer.Length, keyPtr);
var valuedb = new DirectBuffer(value.Buffer.Length, valPtr);
db.Put(tx, ref keydb, ref valuedb, flags);
}
}
public static unsafe Bufferable PrefixWithIndexAndTerm(this Bufferable b, long index, long term)
{
var buffer = new byte[sizeof(long) * 2 + b.Buffer.Length];
fixed(byte *ptr = &b.Buffer[0], destPtr = &buffer[0])
{
Buffer.MemoryCopy(Unsafe.AsPointer(ref index), destPtr, buffer.Length, sizeof(long));
Buffer.MemoryCopy(Unsafe.AsPointer(ref term), destPtr + sizeof(long), buffer.Length, sizeof(long));
Buffer.MemoryCopy(ptr, destPtr + sizeof(long) * 2, b.Buffer.Length, b.Buffer.Length);
}
return(new Bufferable(buffer));
}
public static unsafe bool TryGet(this ReadOnlyTransaction tx, Database db, Bufferable key, out Bufferable value)
{
value = default;
fixed(byte *keyPtr = &key.Buffer[0])
{
var keydb = new DirectBuffer(key.Buffer.Length, keyPtr);
DirectBuffer valuedb = default;
var success = db.TryGet(tx, ref keydb, out valuedb);
if (success)
{
value = new Bufferable(valuedb.Span.ToArray());
}
return(success);
}
}
public static unsafe bool TryGetDuplicate(this ReadOnlyTransaction tx, Database db, Bufferable key, ref Bufferable value)
{
using (var c = db.OpenReadOnlyCursor(tx))
{
fixed(byte *keyPtr = &key.Buffer[0], valPtr = &value.Buffer[0])
{
var keydb = new DirectBuffer(key.Buffer.Length, keyPtr);
var valuedb = new DirectBuffer(value.Buffer.Length, valPtr);
var success = c.TryFindDup(Lookup.EQ, ref keydb, ref valuedb);
if (success)
{
value = new Bufferable(valuedb.Span.ToArray());
}
return(success);
}
}
}