1 /*
2    Copyright (c) 2003, 2021, Oracle and/or its affiliates.
3 
4    This program is free software; you can redistribute it and/or modify
5    it under the terms of the GNU General Public License, version 2.0,
6    as published by the Free Software Foundation.
7 
8    This program is also distributed with certain software (including
9    but not limited to OpenSSL) that is licensed under separate terms,
10    as designated in a particular file or component or in included license
11    documentation.  The authors of MySQL hereby grant you an additional
12    permission to link the program and your derivative works with the
13    separately licensed software that they have included with MySQL.
14 
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License, version 2.0, for more details.
19 
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
23 */
24 
25 #ifndef __REQUEST_TRACKER_HPP
26 #define __REQUEST_TRACKER_HPP
27 
28 #include "SafeCounter.hpp"
29 
30 #define JAM_FILE_ID 328
31 
32 
33 class RequestTracker {
34 public:
RequestTracker()35   RequestTracker(){ init(); }
36 
init()37   void init() { m_confs.clear(); m_nRefs = 0; }
38 
39   template<typename SignalClass>
init(SafeCounterManager & mgr,NodeReceiverGroup rg,Uint16 GSN,Uint32 senderData)40   bool init(SafeCounterManager& mgr,
41 	    NodeReceiverGroup rg, Uint16 GSN, Uint32 senderData)
42   {
43     init();
44     SafeCounter tmp(mgr, m_sc);
45     return tmp.init<SignalClass>(rg, GSN, senderData);
46   }
47 
ignoreRef(SafeCounterManager & mgr,Uint32 nodeId)48   bool ignoreRef(SafeCounterManager& mgr, Uint32 nodeId)
49   { return m_sc.clearWaitingFor(mgr, nodeId); }
50 
reportRef(SafeCounterManager & mgr,Uint32 nodeId)51   bool reportRef(SafeCounterManager& mgr, Uint32 nodeId)
52   { m_nRefs++; return m_sc.clearWaitingFor(mgr, nodeId); }
53 
reportConf(SafeCounterManager & mgr,Uint32 nodeId)54   bool reportConf(SafeCounterManager& mgr, Uint32 nodeId)
55   { m_confs.set(nodeId); return m_sc.clearWaitingFor(mgr, nodeId); }
56 
hasRef()57   bool hasRef() { return m_nRefs != 0; }
58 
hasConf()59   bool hasConf() { return !m_confs.isclear(); }
60 
done()61   bool done() { return m_sc.done(); }
62 
63   NdbNodeBitmask m_confs;
64 
65 private:
66   SafeCounterHandle m_sc;
67   Uint8 m_nRefs;
68 };
69 
70 
71 #undef JAM_FILE_ID
72 
73 #endif // __REQUEST_TRACKER_HPP
74