1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
Copyright (c) 2015, Facebook, Inc.
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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
#pragma once
/* C++ standard header file */
#include <chrono>
#include <condition_variable>
#include <functional>
#include <mutex>
#include <unordered_map>
/* MySQL header files */
#include "./my_sys.h"
#include "mysql/plugin.h"
/* RocksDB header files */
#include "rocksdb/utilities/transaction_db_mutex.h"
#include "rdb_mariadb_port.h"
namespace myrocks {
class Rdb_mutex : public rocksdb::TransactionDBMutex {
Rdb_mutex(const Rdb_mutex &p) = delete;
Rdb_mutex &operator=(const Rdb_mutex &p) = delete;
public:
Rdb_mutex();
virtual ~Rdb_mutex() override;
/*
Override parent class's virtual methods of interrest.
*/
// Attempt to acquire lock. Return OK on success, or other Status on failure.
// If returned status is OK, TransactionDB will eventually call UnLock().
virtual rocksdb::Status Lock() override;
// Attempt to acquire lock. If timeout is non-negative, operation should be
// failed after this many microseconds.
// Returns OK on success,
// TimedOut if timed out,
// or other Status on failure.
// If returned status is OK, TransactionDB will eventually call UnLock().
virtual rocksdb::Status TryLockFor(
int64_t timeout_time MY_ATTRIBUTE((__unused__))) override;
// Unlock Mutex that was successfully locked by Lock() or TryLockUntil()
virtual void UnLock() override;
private:
mysql_mutex_t m_mutex;
friend class Rdb_cond_var;
#ifndef STANDALONE_UNITTEST
void set_unlock_action(const PSI_stage_info *const old_stage_arg);
std::unordered_map<THD *, std::shared_ptr<PSI_stage_info>> m_old_stage_info;
#endif
};
class Rdb_cond_var : public rocksdb::TransactionDBCondVar {
Rdb_cond_var(const Rdb_cond_var &) = delete;
Rdb_cond_var &operator=(const Rdb_cond_var &) = delete;
public:
Rdb_cond_var();
virtual ~Rdb_cond_var() override;
/*
Override parent class's virtual methods of interrest.
*/
// Block current thread until condition variable is notified by a call to
// Notify() or NotifyAll(). Wait() will be called with mutex locked.
// Returns OK if notified.
// Returns non-OK if TransactionDB should stop waiting and fail the operation.
// May return OK spuriously even if not notified.
virtual rocksdb::Status Wait(
const std::shared_ptr<rocksdb::TransactionDBMutex> mutex) override;
// Block current thread until condition variable is notifiesd by a call to
// Notify() or NotifyAll(), or if the timeout is reached.
// If timeout is non-negative, operation should be failed after this many
// microseconds.
// If implementing a custom version of this class, the implementation may
// choose to ignore the timeout.
//
// Returns OK if notified.
// Returns TimedOut if timeout is reached.
// Returns other status if TransactionDB should otherwis stop waiting and
// fail the operation.
// May return OK spuriously even if not notified.
virtual rocksdb::Status WaitFor(
const std::shared_ptr<rocksdb::TransactionDBMutex> mutex,
int64_t timeout_time) override;
// If any threads are waiting on *this, unblock at least one of the
// waiting threads.
virtual void Notify() override;
// Unblocks all threads waiting on *this.
virtual void NotifyAll() override;
private:
mysql_cond_t m_cond;
};
class Rdb_mutex_factory : public rocksdb::TransactionDBMutexFactory {
public:
Rdb_mutex_factory(const Rdb_mutex_factory &) = delete;
Rdb_mutex_factory &operator=(const Rdb_mutex_factory &) = delete;
Rdb_mutex_factory() = default;
/*
Override parent class's virtual methods of interrest.
*/
virtual std::shared_ptr<rocksdb::TransactionDBMutex> AllocateMutex()
override {
return std::make_shared<Rdb_mutex>();
}
virtual std::shared_ptr<rocksdb::TransactionDBCondVar> AllocateCondVar()
override {
return std::make_shared<Rdb_cond_var>();
}
virtual ~Rdb_mutex_factory() override = default;
};
} // namespace myrocks
|
