1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*=========================================================================
Program: Visualization Toolkit
Module: TestGarbageCollector.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkCallbackCommand.h"
#include "vtkDebugLeaks.h"
#include "vtkGarbageCollector.h"
#include "vtkObject.h"
#include "vtkSmartPointer.h"
// A class that simulates a reference loop and participates in garbage
// collection.
class vtkTestReferenceLoop: public vtkObject
{
public:
static vtkTestReferenceLoop* New()
{
vtkTestReferenceLoop *ret = new vtkTestReferenceLoop;
ret->InitializeObjectBase();
return ret;
}
vtkTypeMacro(vtkTestReferenceLoop, vtkObject);
void Register(vtkObjectBase* o) VTK_OVERRIDE { this->RegisterInternal(o, 1); }
void UnRegister(vtkObjectBase* o) VTK_OVERRIDE { this->UnRegisterInternal(o, 1); }
protected:
vtkTestReferenceLoop()
{
this->Other = new vtkTestReferenceLoop(this);
this->Other->InitializeObjectBase();
}
vtkTestReferenceLoop(vtkTestReferenceLoop* other)
{
this->Other = other;
this->Other->Register(this);
}
~vtkTestReferenceLoop() VTK_OVERRIDE
{
if(this->Other)
{
this->Other->UnRegister(this);
this->Other = 0;
}
}
void ReportReferences(vtkGarbageCollector* collector) VTK_OVERRIDE
{
vtkGarbageCollectorReport(collector, this->Other, "Other");
}
vtkTestReferenceLoop* Other;
private:
vtkTestReferenceLoop(const vtkTestReferenceLoop&) VTK_DELETE_FUNCTION;
void operator=(const vtkTestReferenceLoop&) VTK_DELETE_FUNCTION;
};
// A callback that reports when it is called.
static int called = 0;
static void MyDeleteCallback(vtkObject*, unsigned long, void*, void*)
{
called = 1;
}
// Main test function.
int TestGarbageCollector(int,char *[])
{
// Create a callback that reports when it is called.
vtkSmartPointer<vtkCallbackCommand> cc =
vtkSmartPointer<vtkCallbackCommand>::New();
cc->SetCallback(MyDeleteCallback);
// Create an object and delete it immediately. It should be
// immediately collected.
vtkTestReferenceLoop* obj = vtkTestReferenceLoop::New();
obj->AddObserver(vtkCommand::DeleteEvent, cc);
called = 0;
obj->Delete();
if(!called)
{
cerr << "Object not immediately collected." << endl;
return 1;
}
// Create an object, enable deferred collection, and delete it. It
// should not be collected yet.
obj = vtkTestReferenceLoop::New();
obj->AddObserver(vtkCommand::DeleteEvent, cc);
vtkGarbageCollector::DeferredCollectionPush();
called = 0;
obj->Delete();
if(called)
{
cerr << "Object collection not deferred." << endl;
return 1;
}
// Disable deferred collection. The object should be deleted now.
vtkGarbageCollector::DeferredCollectionPop();
if(!called)
{
cerr << "Deferred collection did not collect object." << endl;
return 1;
}
return 0;
}
|
