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src
tools
Reversible.cc
Go to the documentation of this file.
1
/*
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Copyright (c) 2002-2020 Tampere University.
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4
This file is part of TTA-Based Codesign Environment (TCE).
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Permission is hereby granted, free of charge, to any person obtaining a
7
copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
10
and/or sell copies of the Software, and to permit persons to whom the
11
Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22
DEALINGS IN THE SOFTWARE.
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*/
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/**
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* @file Reversible.cc
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* Implementation of Reversible class; Framework for operations that contain
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* undo infromation and can be recursively reverted.
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*/
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#include <cassert>
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#include "
Reversible.hh
"
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/** Delete the undo information. cannot revert after this */
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Reversible::~Reversible
() {
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deleteChildren
(
postChildren_
);
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deleteChildren
(
preChildren_
);
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}
39
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/** Delete children without reverting them.
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They cannot be reverted after this */
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void
Reversible::deleteChildren
(std::stack<Reversible*>& children) {
43
while
(!children.empty()) {
44
Reversible
* child = children.top();
45
assert
(child !=
nullptr
);
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children.pop();
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delete
child;
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}
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}
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/**
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* Undoes one stack of children.
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*/
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void
55
Reversible::undoAndRemoveChildren
(std::stack<Reversible*>& children) {
56
while
(!children.empty()) {
57
Reversible
* child = children.top();
58
assert
(child !=
nullptr
);
59
children.pop();
60
child->
undo
();
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delete
child;
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}
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}
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65
/**
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* Undoes this and all children.
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*/
68
void
69
Reversible::undo
() {
70
undoAndRemovePostChildren
();
71
undoOnlyMe
();
72
undoAndRemovePreChildren
();
73
}
74
75
/**
76
* Recursively calls undo for all children that were performed before this.
77
* So these are undoed after this is undoed
78
*/
79
void
80
Reversible::undoAndRemovePreChildren
() {
81
undoAndRemoveChildren
(
preChildren_
);
82
}
83
84
/**
85
* Recursively calls undo for all children that were performed after this.
86
* So these are undoed before this is undoed
87
*/
88
void
89
Reversible::undoAndRemovePostChildren
() {
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undoAndRemoveChildren
(
postChildren_
);
91
}
92
93
/**
94
* Undoes the operations done by this class but not children.
95
* This method should be overloaded by most derived classes.
96
*/
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void
98
Reversible::undoOnlyMe
() {}
99
100
/**
101
* Tries to run another Reversible and takes ownership of it.
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*
103
* If the running succeeds, makes it a child.
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* If the running fails, deletes it.
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*
106
* @return true if running child succeeded, false if failed.
107
*/
108
bool
109
Reversible::runChild
(std::stack<Reversible*>& children,
Reversible
* child) {
110
if
((*child)()) {
111
children.push(child);
112
return
true
;
113
}
else
{
114
delete
child;
115
return
false
;
116
}
117
}
118
119
/**
120
* Tries to run another Reversible (before running this).
121
*
122
* If the running succeeds, makes it a pre-child.
123
* If the running fails, deletes it.
124
*
125
* @return true if running child succeeded, false if failed.
126
*/
127
bool
Reversible::runPreChild
(
Reversible
* preChild) {
128
return
runChild
(
preChildren_
, preChild);
129
}
130
131
/**
132
* Tries to run another Reversible (after running this).
133
*
134
* If the running succeeds, makes it a post-child.
135
* If the running fails, deletes it.
136
*
137
* @return true if running child succeeded, false if failed.
138
*/
139
bool
Reversible::runPostChild
(
Reversible
* postChild) {
140
return
runChild
(
postChildren_
, postChild);
141
}
142
143
/**
144
* Tries to run another Reversible and takes ownership of it.
145
*
146
* @param if pre is true, make it a pre-child,
147
* if pre is false, make it a post-child.
148
*
149
* @return true if running child succeeded, false if failed.
150
*/
151
bool
Reversible::runChild
(
Reversible
* child,
bool
pre) {
152
if
(pre) {
153
return
runPreChild
(child);
154
}
else
{
155
return
runPostChild
(child);
156
}
157
}
158
159
int
Reversible::idCounter_
= 0;
Reversible::postChildren_
std::stack< Reversible * > postChildren_
Definition:
Reversible.hh:58
Reversible::idCounter_
static int idCounter_
Definition:
Reversible.hh:62
Reversible::undoAndRemovePreChildren
void undoAndRemovePreChildren()
Definition:
Reversible.cc:80
Reversible::undoAndRemoveChildren
void undoAndRemoveChildren(std::stack< Reversible * > &children)
Definition:
Reversible.cc:55
Reversible
Definition:
Reversible.hh:36
Reversible::preChildren_
std::stack< Reversible * > preChildren_
Definition:
Reversible.hh:57
assert
#define assert(condition)
Definition:
Application.hh:86
Reversible::undo
virtual void undo()
Definition:
Reversible.cc:69
Reversible::undoOnlyMe
virtual void undoOnlyMe()
Definition:
Reversible.cc:98
Reversible.hh
Reversible::deleteChildren
void deleteChildren(std::stack< Reversible * > &children)
Definition:
Reversible.cc:42
Reversible::~Reversible
virtual ~Reversible()
Definition:
Reversible.cc:35
Reversible::runChild
bool runChild(std::stack< Reversible * > &children, Reversible *child)
Definition:
Reversible.cc:109
Reversible::runPreChild
bool runPreChild(Reversible *preChild)
Definition:
Reversible.cc:127
Reversible::undoAndRemovePostChildren
void undoAndRemovePostChildren()
Definition:
Reversible.cc:89
Reversible::runPostChild
bool runPostChild(Reversible *preChild)
Definition:
Reversible.cc:139
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