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61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/* Copyright (C) 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef CHECKNODEGROUPS_H
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#define CHECKNODEGROUPS_H
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#include <string.h>
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#include <NodeBitmask.hpp>
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#include "SignalData.hpp"
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#include "SignalDataPrint.hpp"
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/**
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* Ask DIH to check if a node set can survive i.e. if it
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* has at least one node in every node group. Returns one
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* of Win, Lose, Partitioning.
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*
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* Same class is used for REQ and CONF. The REQ can also
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* be executed as a direct signal.
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*/
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class CheckNodeGroups {
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public:
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Uint32 blockRef; // sender's node id
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union {
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Uint32 requestType; // direct flag, output code
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Uint32 output;
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};
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Uint32 nodeId; // nodeId input for GetNodeGroupMembers
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NodeBitmask mask; /* set of NDB nodes, input for ArbitCheck,
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* output for GetNodeGroupMembers
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*/
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enum RequestType {
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Direct = 0x1,
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ArbitCheck = 0x2,
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GetNodeGroup = 0x4,
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GetNodeGroupMembers = 0x8
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};
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enum Output {
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Lose = 1, // we cannot survive
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Win = 2, // we and only we can survive
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Partitioning = 3 // possible network partitioning
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};
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STATIC_CONST( SignalLength = 3 + NodeBitmask::Size );
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};
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#endif
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