1 /*
2    Copyright (c) 2011, 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 NDB_MUTEX_DEADLOCK_DETECTOR_H
26 #define NDB_MUTEX_DEADLOCK_DETECTOR_H
27 
28 #include <NdbMutex.h>
29 
30 struct nmdd_mask
31 {
32   unsigned char * m_mask;
33   unsigned m_len;
34 };
35 
36 struct nmdd_mutex_array
37 {
38   NdbMutex ** m_array;
39   unsigned m_used;
40   unsigned m_array_len;
41 };
42 
43 struct ndb_mutex_state
44 {
45   struct nmdd_mask m_locked_before_mask; /* mutexes held when locking this mutex */
46   struct nmdd_mutex_array m_locked_before_list; /* mutexes held when locking this mutex */
47 
48   struct nmdd_mutex_array m_locked_after_list; /* mutexes locked when holding this mutex*/
49   struct nmdd_mask m_locked_after_mask;        /* mask (for quick check) */
50 
51   unsigned m_no; /* my mutex "id" (for access in masks) */
52 };
53 
54 struct ndb_mutex_thr_state
55 {
56   struct nmdd_mutex_array m_mutexes_locked;
57 };
58 
59 #ifdef	__cplusplus
60 extern "C" {
61 #endif
62 
63   void NdbMutex_DeadlockDetectorInit();
64   void NdbMutex_DeadlockDetectorEnd();
65 
66   void ndb_mutex_created(NdbMutex*);
67   void ndb_mutex_destoyed(NdbMutex*);
68   void ndb_mutex_locked(NdbMutex*);
69   void ndb_mutex_unlocked(NdbMutex*);
70   void ndb_mutex_try_locked(NdbMutex*);
71 
72   void ndb_mutex_thread_init(struct ndb_mutex_thr_state*);
73   void ndb_mutex_thread_exit();
74 
75 #ifdef	__cplusplus
76 }
77 #endif
78 
79 
80 #endif
81