CheckNodeGroups.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- 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.
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef CHECKNODEGROUPS_H
- #define CHECKNODEGROUPS_H
- #include <string.h>
- #include <NodeBitmask.hpp>
- #include "SignalData.hpp"
- #include "SignalDataPrint.hpp"
- /**
- * Ask DIH to check if a node set can survive i.e. if it
- * has at least one node in every node group. Returns one
- * of Win, Lose, Partitioning.
- *
- * Same class is used for REQ and CONF. The REQ can also
- * be executed as a direct signal.
- */
- class CheckNodeGroups {
- public:
- Uint32 blockRef; // sender's node id
- union {
- Uint32 requestType; // direct flag, output code
- Uint32 output;
- };
- Uint32 nodeId; // nodeId input for GetNodeGroupMembers
- NodeBitmask mask; /* set of NDB nodes, input for ArbitCheck,
- * output for GetNodeGroupMembers
- */
- enum RequestType {
- Direct = 0x1,
- ArbitCheck = 0x2,
- GetNodeGroup = 0x4,
- GetNodeGroupMembers = 0x8
- };
- enum Output {
- Lose = 1, // we cannot survive
- Win = 2, // we and only we can survive
- Partitioning = 3 // possible network partitioning
- };
- STATIC_CONST( SignalLength = 3 + NodeBitmask::Size );
- };
- #endif