From 917a23bd59d2e2e2e35991e3266e284072489b5c Mon Sep 17 00:00:00 2001 From: John Esmet Date: Fri, 23 May 2014 18:13:59 -0400 Subject: [PATCH] TMX-242 Add cursor.h, which missed the last commit --- ft/cursor.h | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 ft/cursor.h diff --git a/ft/cursor.h b/ft/cursor.h new file mode 100644 index 00000000000..e8417697dfc --- /dev/null +++ b/ft/cursor.h @@ -0,0 +1,115 @@ +/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ +// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4: + +/* +COPYING CONDITIONS NOTICE: + + This program is free software; you can redistribute it and/or modify + it under the terms of version 2 of the GNU General Public License as + published by the Free Software Foundation, and provided that the + following conditions are met: + + * Redistributions of source code must retain this COPYING + CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the + DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the + PATENT MARKING NOTICE (below), and the PATENT RIGHTS + GRANT (below). + + * Redistributions in binary form must reproduce this COPYING + CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the + DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the + PATENT MARKING NOTICE (below), and the PATENT RIGHTS + GRANT (below) in the documentation and/or other materials + provided with the distribution. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301, USA. + +COPYRIGHT NOTICE: + + TokuDB, Tokutek Fractal Tree Indexing Library. + Copyright (C) 2014 Tokutek, Inc. + +DISCLAIMER: + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + +UNIVERSITY PATENT NOTICE: + + The technology is licensed by the Massachusetts Institute of + Technology, Rutgers State University of New Jersey, and the Research + Foundation of State University of New York at Stony Brook under + United States of America Serial No. 11/760379 and to the patents + and/or patent applications resulting from it. + +PATENT MARKING NOTICE: + + This software is covered by US Patent No. 8,185,551. + This software is covered by US Patent No. 8,489,638. + +PATENT RIGHTS GRANT: + + "THIS IMPLEMENTATION" means the copyrightable works distributed by + Tokutek as part of the Fractal Tree project. + + "PATENT CLAIMS" means the claims of patents that are owned or + licensable by Tokutek, both currently or in the future; and that in + the absence of this license would be infringed by THIS + IMPLEMENTATION or by using or running THIS IMPLEMENTATION. + + "PATENT CHALLENGE" shall mean a challenge to the validity, + patentability, enforceability and/or non-infringement of any of the + PATENT CLAIMS or otherwise opposing any of the PATENT CLAIMS. + + Tokutek hereby grants to you, for the term and geographical scope of + the PATENT CLAIMS, a non-exclusive, no-charge, royalty-free, + irrevocable (except as stated in this section) patent license to + make, have made, use, offer to sell, sell, import, transfer, and + otherwise run, modify, and propagate the contents of THIS + IMPLEMENTATION, where such license applies only to the PATENT + CLAIMS. This grant does not include claims that would be infringed + only as a consequence of further modifications of THIS + IMPLEMENTATION. If you or your agent or licensee institute or order + or agree to the institution of patent litigation against any entity + (including a cross-claim or counterclaim in a lawsuit) alleging that + THIS IMPLEMENTATION constitutes direct or contributory patent + infringement, or inducement of patent infringement, then any rights + granted to you under this License shall terminate as of the date + such litigation is filed. If you or your agent or exclusive + licensee institute or order or agree to the institution of a PATENT + CHALLENGE, then Tokutek may terminate any rights granted to you + under this License. +*/ + +#pragma once + +#include + +#include "portability/toku_list.h" + +typedef bool(*FT_CHECK_INTERRUPT_CALLBACK)(void* extra); + +/* an ft cursor is represented as a kv pair in a tree */ +struct ft_cursor { + struct toku_list cursors_link; + FT_HANDLE ft_handle; + DBT key, val; // The key-value pair that the cursor currently points to + DBT range_lock_left_key, range_lock_right_key; + bool prefetching; + bool left_is_neg_infty, right_is_pos_infty; + bool is_snapshot_read; // true if query is read_committed, false otherwise + bool is_leaf_mode; + bool disable_prefetching; + bool is_temporary; + int out_of_range_error; + int direction; + TOKUTXN ttxn; + FT_CHECK_INTERRUPT_CALLBACK interrupt_cb; + void *interrupt_cb_extra; +}; +typedef struct ft_cursor *FT_CURSOR;