Drizzled Public API Documentation

lock_storage.h
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2010 Brian Aker
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6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
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11  * This program is distributed in the hope that it will be useful,
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14  * GNU General Public License for more details.
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20 
21 #pragma once
22 
23 #include <drizzled/session.h>
24 #include <drizzled/util/storable.h>
25 #include <boost/unordered_set.hpp>
26 
27 namespace user_locks {
28 
29 /*
30  We a storable to track any locks we might have open so that if we are disconnected before we release the locks, we release the locks during the deconstruction of Session.
31 */
32 
34  Keys list_of_locks;
35  drizzled::session_id_t id;
36 
37 public:
38 
39  Storable(drizzled::session_id_t id_arg) :
40  id(id_arg)
41  {
42  }
43 
44  ~Storable()
45  {
46  erase_all();
47  }
48 
49  void insert(const Key &arg)
50  {
51  list_of_locks.insert(arg);
52  }
53 
54  bool erase(const Key &arg)
55  {
56  return boost::lexical_cast<bool>(list_of_locks.erase(arg));
57  }
58 
59  // An assert() should be added so that we can test to make sure the locks
60  // are what we think they are (i.e. test the result of release())
61  int64_t erase_all()
62  {
63  int64_t count= list_of_locks.size();
64 
65  for (Keys::iterator iter= list_of_locks.begin();
66  iter != list_of_locks.end(); iter++)
67  {
68  (void)user_locks::Locks::getInstance().release(*iter, id);
69  }
70  list_of_locks.clear();
71 
72  return count;
73  }
74 
75 };
76 
77 
78 } /* namespace user_locks */
79