blob: 480f30d2972a2dd4bad9b216670a3cbfd82e1554 (
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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// file : odb/mysql/statement-cache.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2010 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_MYSQL_STATEMENT_CACHE_HXX
#define ODB_MYSQL_STATEMENT_CACHE_HXX
#include <odb/pre.hxx>
#include <map>
#include <typeinfo>
#include <odb/forward.hxx>
#include <odb/mysql/version.hxx>
#include <odb/mysql/object-statements.hxx>
#include <odb/details/shared-ptr.hxx>
#include <odb/mysql/details/export.hxx>
namespace odb
{
namespace mysql
{
class connection;
struct LIBODB_MYSQL_EXPORT type_info_comparator
{
bool
operator() (const std::type_info* x, const std::type_info* y) const
{
// XL C++ on AIX has buggy type_info::before() in that
// it returns true for two different type_info objects
// that happened to be for the same type.
//
#if defined(__xlC__) && defined(_AIX)
return *x != *y && x->before (*y);
#else
return x->before (*y);
#endif
}
};
class LIBODB_MYSQL_EXPORT statement_cache
{
public:
statement_cache (connection& conn)
: conn_ (conn)
{
}
template <typename T>
object_statements<T>&
find ()
{
map::iterator i (map_.find (&typeid (T)));
if (i != map_.end ())
return static_cast<object_statements<T>&> (*i->second);
details::shared_ptr<object_statements<T> > p (
new (details::shared) object_statements<T> (conn_));
map_.insert (map::value_type (&typeid (T), p));
return *p;
}
private:
typedef std::map<const std::type_info*,
details::shared_ptr<object_statements_base>,
type_info_comparator> map;
connection& conn_;
map map_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_MYSQL_STATEMENT_CACHE_HXX
|
