kvproto.hh

/* Masstree
 * Eddie Kohler, Yandong Mao, Robert Morris
 * Copyright (c) 2012-2013 President and Fellows of Harvard College
 * Copyright (c) 2012-2013 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, subject to the conditions
 * listed in the Masstree LICENSE file. These conditions include: you must
 * preserve this copyright notice, and you cannot mention the copyright
 * holders in advertising related to the Software without their permission.
 * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
 * notice is a summary of the Masstree LICENSE file; the license in that file
 * is legally binding.
 */
#ifndef KVPROTO_HH
#define KVPROTO_HH
#include "compiler.hh"

enum {
    Cmd_None = 0,
    Cmd_Get = 2,
    Cmd_Scan = 4,
    Cmd_Put = 6,
    Cmd_Replace = 8,
    Cmd_Remove = 10,
    Cmd_Checkpoint = 12,
    Cmd_Handshake = 14,
    Cmd_Max
};

enum result_t {
    NotFound = -2,
    Retry,
    OutOfDate,
    Inserted,
    Updated,
    Found,
    ScanDone
};

enum ckptrav_order_t {
    ckptrav_inorder = 0,
    ckptrav_preorder
};

struct row_marker {
    enum { mt_remove = 1, mt_delta = 2 };
    int marker_type_;
};

template <typename R>
inline bool row_is_marker(const R* row) {
    return row->timestamp() & 1;
}

#endif