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annotate anagram/support/agref.cpp @ 6:607e3be6bad8

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Adjust to the moving target called the C++ standard. Apparently nowadays it's not allowed to define an explicit copy constructor but not an assignment operator. Consequently, defining the explicit copy constructor in terms of the implicit/automatic assignment operator for general convenience no longer works. Add assignment operators. Caution: not tested with the IBM compiler, but there's no particular reason it shouldn't work.
author David A. Holland
date Mon, 30 May 2022 23:46:22 -0400
parents 13d2b8934445
children
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1 /**********************************************************
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2
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3 The AnaGram Class Library
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4
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5 The AgReference Class
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6 Copyright 1997 Parsifal Software. All Rights Reserved.
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7 See the file COPYING for license and usage terms.
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8
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9 ***********************************************************/
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10
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11 #include "agref.h"
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12
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13 void AgReferenceBase::doAssignmentLocks(const AgReferenceBase &r) {
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14 if (object!=0 && object->unlock()) {
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15 delete object;
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16 }
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17 object = r.object;
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18 if (object != 0) {
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19 object->lock();
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20 }
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21 }
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22
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23 AgReferenceBase::AgReferenceBase() : object(0) {}
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24
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25 AgReferenceBase::AgReferenceBase(AgReferenceCount* object_)
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26 : object(object_)
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27 {
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28 if (object != 0) {
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29 object->lock();
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30 }
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31 }
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32
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33 AgReferenceBase::AgReferenceBase(const AgReferenceBase &r)
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34 : object(r.object)
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35 {
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36 if (object!= 0) {
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37 object->lock();
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38 }
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39 }
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40
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41 AgReferenceBase::~AgReferenceBase() {
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42 if (object!= 0 && object->unlock()) {
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43 delete object;
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44 }
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45 }
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46
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47 int AgReferenceBase::exists() const {
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48 return object != 0;
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49 }
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50
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51 void AgReferenceBase::discardData() {
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52 if (object && object->unlock()) {
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53 delete object;
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54 }
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55 object = 0;
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56 }
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57