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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
// file : odb/sqlite/connection.hxx
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_SQLITE_CONNECTION_HXX
#define ODB_SQLITE_CONNECTION_HXX
#include <odb/pre.hxx>
#include <sqlite3.h>
#include <odb/connection.hxx>
#include <odb/details/mutex.hxx>
#include <odb/details/condition.hxx>
#include <odb/details/shared-ptr.hxx>
#include <odb/details/unique-ptr.hxx>
#include <odb/sqlite/version.hxx>
#include <odb/sqlite/forward.hxx>
#include <odb/sqlite/query.hxx>
#include <odb/sqlite/tracer.hxx>
#include <odb/sqlite/transaction-impl.hxx>
#include <odb/sqlite/auto-handle.hxx>
#include <odb/sqlite/details/export.hxx>
namespace odb
{
namespace sqlite
{
class statement_cache;
class connection_factory;
class connection;
typedef details::shared_ptr<connection> connection_ptr;
// SQLite "active object", i.e., an object that needs to be
// "cleared" before the transaction can be committed and the
// connection release. These form a doubly-linked list.
//
class LIBODB_SQLITE_EXPORT active_object
{
public:
// This function should remove the object from the list, since
// it shall no longer be "active".
//
virtual void
clear () = 0;
protected:
active_object (connection& c): prev_ (0), next_ (this), conn_ (c) {}
void
list_add ();
void
list_remove ();
protected:
// prev_ == 0 means we are the first element.
// next_ == 0 means we are the last element.
// next_ == this means we are not on the list (prev_ should be 0).
//
active_object* prev_;
active_object* next_;
connection& conn_;
};
class LIBODB_SQLITE_EXPORT connection: public odb::connection
{
public:
typedef sqlite::statement_cache statement_cache_type;
typedef sqlite::database database_type;
virtual
~connection ();
connection (connection_factory&, int extra_flags = 0);
connection (connection_factory&, sqlite3* handle);
database_type&
database ();
public:
virtual transaction_impl*
begin ();
transaction_impl*
begin_immediate ();
transaction_impl*
begin_exclusive ();
public:
using odb::connection::execute;
virtual unsigned long long
execute (const char* statement, std::size_t length);
// Query preparation.
//
public:
template <typename T>
prepared_query<T>
prepare_query (const char* name, const char*);
template <typename T>
prepared_query<T>
prepare_query (const char* name, const std::string&);
template <typename T>
prepared_query<T>
prepare_query (const char* name, const sqlite::query_base&);
template <typename T>
prepared_query<T>
prepare_query (const char* name, const odb::query_base&);
// SQL statement tracing.
//
public:
typedef sqlite::tracer tracer_type;
void
tracer (tracer_type& t)
{
odb::connection::tracer (t);
}
void
tracer (tracer_type* t)
{
odb::connection::tracer (t);
}
using odb::connection::tracer;
public:
sqlite3*
handle ()
{
return handle_;
}
statement_cache_type&
statement_cache ()
{
return *statement_cache_;
}
// Wait for the locks to be released via unlock notification. Can
// be called after getting SQLITE_LOCKED_SHAREDCACHE.
//
void
wait ();
public:
// Reset active statements.
//
void
clear ();
private:
connection (const connection&);
connection& operator= (const connection&);
private:
void
init ();
private:
auto_handle<sqlite3> handle_;
// Keep statement_cache_ after handle_ so that it is destroyed before
// the connection is closed.
//
details::unique_ptr<statement_cache_type> statement_cache_;
// Unlock notification machinery.
//
private:
bool unlocked_;
details::mutex unlock_mutex_;
details::condition unlock_cond_;
friend void
connection_unlock_callback (void**, int);
private:
friend class transaction_impl; // invalidate_results()
// Linked list of active objects currently associated
// with this connection.
//
private:
friend class active_object;
active_object* active_objects_;
};
class LIBODB_SQLITE_EXPORT connection_factory:
public odb::connection_factory
{
public:
typedef sqlite::database database_type;
virtual void
database (database_type&);
database_type&
database () {return *db_;}
virtual connection_ptr
connect () = 0;
virtual
~connection_factory ();
connection_factory (): db_ (0) {}
// Needed to break the circular connection_factory-database dependency
// (odb::connection_factory has the odb::database member).
//
protected:
database_type* db_;
};
}
}
#include <odb/sqlite/connection.ixx>
#include <odb/post.hxx>
#endif // ODB_SQLITE_CONNECTION_HXX
|
