blob: a4c29e239a239302d38868211bdb298bcc4bcb4c (
plain)
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
|
// file : odb/sqlite/statements-base.hxx
// copyright : Copyright (c) 2005-2017 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_SQLITE_STATEMENTS_BASE_HXX
#define ODB_SQLITE_STATEMENTS_BASE_HXX
#include <odb/pre.hxx>
#include <odb/schema-version.hxx>
#include <odb/details/shared-ptr.hxx>
#include <odb/sqlite/version.hxx>
#include <odb/sqlite/connection.hxx>
#include <odb/sqlite/database.hxx>
#include <odb/sqlite/details/export.hxx>
namespace odb
{
namespace sqlite
{
class LIBODB_SQLITE_EXPORT statements_base: public details::shared_base
{
public:
typedef sqlite::connection connection_type;
connection_type&
connection ()
{
return conn_;
}
// Schema version. database::schema_version_migration() is thread-
// safe which means it is also slow. Cache the result in statements
// so we can avoid the mutex lock. This is thread-safe since if the
// version is updated, then the statements cache will be expired.
//
const schema_version_migration&
version_migration (const char* name = "") const
{
if (svm_ == 0)
svm_ = &conn_.database ().schema_version_migration (name);
return *svm_;
}
public:
virtual
~statements_base ();
protected:
statements_base (connection_type& conn): conn_ (conn), svm_ (0) {}
protected:
connection_type& conn_;
mutable const schema_version_migration* svm_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_SQLITE_STATEMENTS_BASE_HXX
|