OpenStructure
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Properties
Friends
Macros
Groups
Pages
stage
include
ost
ptr_observer.hh
Go to the documentation of this file.
1
//------------------------------------------------------------------------------
2
// This file is part of the OpenStructure project <www.openstructure.org>
3
//
4
// Copyright (C) 2008-2011 by the OpenStructure authors
5
// Copyright (C) 2003-2010 by the IPLT authors
6
//
7
// This library is free software; you can redistribute it and/or modify it under
8
// the terms of the GNU Lesser General Public License as published by the Free
9
// Software Foundation; either version 3.0 of the License, or (at your option)
10
// any later version.
11
// This library is distributed in the hope that it will be useful, but WITHOUT
12
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
14
// details.
15
//
16
// You should have received a copy of the GNU Lesser General Public License
17
// along with this library; if not, write to the Free Software Foundation, Inc.,
18
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
//------------------------------------------------------------------------------
20
21
#ifndef OST_PTR_OBSERVER_HH
22
#define OST_PTR_OBSERVER_HH
23
24
#include <
ost/message.hh
>
25
#include <
ost/module_config.hh
>
26
/*
27
ptr observer concept
28
29
Author: Ansgar Philippsen
30
*/
31
32
class
DLLEXPORT
InvalidatedPointer
:
public
ost::Error
{
33
public
:
34
InvalidatedPointer
():
35
ost::Error(
"access attempt on invalidated Pointer"
)
36
{}
37
};
38
39
template
<
class
T>
40
class
TEMPLATE_EXPORT
PtrObserver
{
41
public
:
42
PtrObserver
(T* t):
43
observed_(t),
44
valid_(true)
45
{}
46
47
~PtrObserver
() {}
48
49
void
Invalidate
() {valid_=
false
;}
50
51
bool
IsValid
()
const
{
return
valid_;}
52
53
T&
Ref
() {
54
if
(!valid_)
throw
InvalidatedPointer
();
55
return
*observed_;
56
}
57
58
T*
Ptr
() {
59
if
(!valid_)
throw
InvalidatedPointer
();
60
return
observed_;
61
}
62
63
bool
operator==
(
const
PtrObserver<T>
& ref)
const
{
64
return
observed_ == ref.observed_;
65
}
66
67
private
:
68
PtrObserver
(
const
PtrObserver<T>
& o);
69
PtrObserver<T>
& operator=(
const
PtrObserver<T>
& u);
70
71
T* observed_;
72
bool
valid_;
73
};
74
75
#endif
PtrObserver::IsValid
bool IsValid() const
Definition:
ptr_observer.hh:51
PtrObserver
Definition:
ptr_observer.hh:40
module_config.hh
PtrObserver::operator==
bool operator==(const PtrObserver< T > &ref) const
Definition:
ptr_observer.hh:63
InvalidatedPointer
Definition:
ptr_observer.hh:32
PtrObserver::Ptr
T * Ptr()
Definition:
ptr_observer.hh:58
PtrObserver::Ref
T & Ref()
Definition:
ptr_observer.hh:53
ost::Error
Definition:
message.hh:35
PtrObserver::PtrObserver
PtrObserver(T *t)
Definition:
ptr_observer.hh:42
InvalidatedPointer::InvalidatedPointer
InvalidatedPointer()
Definition:
ptr_observer.hh:34
PtrObserver::~PtrObserver
~PtrObserver()
Definition:
ptr_observer.hh:47
message.hh
PtrObserver::Invalidate
void Invalidate()
Definition:
ptr_observer.hh:49
Generated by
1.8.5