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comparison anagram/support/agref.cpp @ 0:13d2b8934445

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Import AnaGram (near-)release tree into Mercurial.
author David A. Holland
date Sat, 22 Dec 2007 17:52:45 -0500
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-1:000000000000 0:13d2b8934445
1 /**********************************************************
2
3 The AnaGram Class Library
4
5 The AgReference Class
6 Copyright 1997 Parsifal Software. All Rights Reserved.
7 See the file COPYING for license and usage terms.
8
9 ***********************************************************/
10
11 #include "agref.h"
12
13 void AgReferenceBase::doAssignmentLocks(const AgReferenceBase &r) {
14 if (object!=0 && object->unlock()) {
15 delete object;
16 }
17 object = r.object;
18 if (object != 0) {
19 object->lock();
20 }
21 }
22
23 AgReferenceBase::AgReferenceBase() : object(0) {}
24
25 AgReferenceBase::AgReferenceBase(AgReferenceCount* object_)
26 : object(object_)
27 {
28 if (object != 0) {
29 object->lock();
30 }
31 }
32
33 AgReferenceBase::AgReferenceBase(const AgReferenceBase &r)
34 : object(r.object)
35 {
36 if (object!= 0) {
37 object->lock();
38 }
39 }
40
41 AgReferenceBase::~AgReferenceBase() {
42 if (object!= 0 && object->unlock()) {
43 delete object;
44 }
45 }
46
47 int AgReferenceBase::exists() const {
48 return object != 0;
49 }
50
51 void AgReferenceBase::discardData() {
52 if (object && object->unlock()) {
53 delete object;
54 }
55 object = 0;
56 }
57