| Qore Programming Language - C/C++ Library 1.0.8

AbstractPrivateData.h
1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 AbstractPrivateData.h
4
5 abstract class for private data in objects
6
7 Qore Programming Language
8
9 Copyright (C) 2003 - 2021 Qore Technologies, s.r.o.
10
11 Permission is hereby granted, free of charge, to any person obtaining a
12 copy of this software and associated documentation files (the "Software"),
13 to deal in the Software without restriction, including without limitation
14 the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 and/or sell copies of the Software, and to permit persons to whom the
16 Software is furnished to do so, subject to the following conditions:
17
18 The above copyright notice and this permission notice shall be included in
19 all copies or substantial portions of the Software.
20
21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 DEALINGS IN THE SOFTWARE.
28
29 Note that the Qore library is released under a choice of three open-source
30 licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
31 information.
32 */
33
34 #ifndef _QORE_ABSTRACTPRIVATEDATA_H
35
36 #define _QORE_ABSTRACTPRIVATEDATA_H
37
38 #include <qore/QoreReferenceCounter.h>
39
41
44 class AbstractPrivateData : public QoreReferenceCounter {
45 protected:
47 DLLLOCAL virtual ~AbstractPrivateData() {}
48
49 public:
51 DLLLOCAL void ref() const {
52 ROreference();
53 }
54
56
59 DLLLOCAL virtual void deref(ExceptionSink* xsink) {
60 if (ROdereference())
61 delete this;
62 }
63
65 DLLLOCAL virtual void deref() {
66 if (ROdereference())
67 delete this;
68 }
69 };
70
71 #endif // _QORE_ABSTRACTPRIVATEDATA_H
AbstractPrivateData
the base class for all data to be used as private data of Qore objects
Definition: AbstractPrivateData.h:44
QoreReferenceCounter::ROdereference
DLLEXPORT bool ROdereference() const
atomically decrements the reference count
AbstractPrivateData::~AbstractPrivateData
virtual DLLLOCAL ~AbstractPrivateData()
as these objects are reference counted, the destructor should be called only when the reference count...
Definition: AbstractPrivateData.h:47
QoreReferenceCounter
provides atomic reference counting to Qore objects
Definition: QoreReferenceCounter.h:44
AbstractPrivateData::ref
DLLLOCAL void ref() const
increments the reference count of the object
Definition: AbstractPrivateData.h:51
AbstractPrivateData::deref
virtual DLLLOCAL void deref()
decrements the reference count of the object without the possibility of throwing a Qore-language exce...
Definition: AbstractPrivateData.h:65
ExceptionSink
container for holding Qore-language exception information and also for registering a "thread_exit" ca...
Definition: ExceptionSink.h:48
QoreReferenceCounter::ROreference
DLLEXPORT void ROreference() const
atomically increments the reference count