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2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the test suite of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
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17 | ** GNU General Public License Usage |
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19 | ** General Public License version 3 as published by the Free Software |
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25 | ** $QT_END_LICENSE$ |
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27 | ****************************************************************************/ |
28 | |
29 | #include "signalbug.h" |
30 | |
31 | #include <qcoreapplication.h> |
32 | #include <qstring.h> |
33 | |
34 | #include <stdio.h> |
35 | |
36 | static int Step = 0; |
37 | Sender RandomSender (0, 0); |
38 | |
39 | void TRACE (int step, const char *name) |
40 | { |
41 | for (int t = 0; t < step - 1; t++) |
42 | fprintf (stderr, format: "\t" ); |
43 | fprintf (stderr, format: "Step %d: %s\n" , step, name); |
44 | return; |
45 | } |
46 | |
47 | Receiver::Receiver () |
48 | : QObject () |
49 | { |
50 | } |
51 | |
52 | void Receiver::received () |
53 | { |
54 | ::Step++; |
55 | const int stepCopy = ::Step; |
56 | TRACE (step: stepCopy, name: "Receiver::received()" ); |
57 | if (::Step != 2 && ::Step != 4) |
58 | qFatal(msg: "%s: Incorrect Step: %d (should be 2 or 4)" , Q_FUNC_INFO, ::Step); |
59 | |
60 | if (::Step == 2) |
61 | s->fire (); |
62 | |
63 | fprintf (stderr, format: "Receiver<%s>::received() sender=%s\n" , |
64 | (const char *) objectName ().toLatin1 (), sender ()->metaObject()->className()); |
65 | |
66 | TRACE (step: stepCopy, name: "ends Receiver::received()" ); |
67 | } |
68 | |
69 | Disconnector::Disconnector () |
70 | : QObject () |
71 | { |
72 | } |
73 | |
74 | void Disconnector::received () |
75 | { |
76 | ::Step++; |
77 | const int stepCopy = ::Step; |
78 | TRACE (step: stepCopy, name: "Disconnector::received()" ); |
79 | if (::Step != 5 && ::Step != 6) |
80 | qFatal(msg: "%s: Incorrect Step: %d (should be 5 or 6)" , Q_FUNC_INFO, ::Step); |
81 | |
82 | fprintf (stderr, format: "Disconnector<%s>::received() sender=%s\n" , |
83 | (const char *) objectName ().toLatin1 (), sender ()->metaObject()->className()); |
84 | if (sender () == 0) |
85 | fprintf (stderr, format: "WE SHOULD NOT BE RECEIVING THIS SIGNAL\n" ); |
86 | |
87 | if (::Step == 5) |
88 | { |
89 | disconnect (sender: s, SIGNAL(fired()), receiver: s->d, SLOT(received())); |
90 | |
91 | connect (sender: &RandomSender, SIGNAL(fired()), receiver: s->d, SLOT(received())); |
92 | } |
93 | |
94 | TRACE (step: stepCopy, name: "ends Disconnector::received()" ); |
95 | } |
96 | |
97 | |
98 | Sender::Sender (Receiver *r, Disconnector *d) |
99 | : QObject () |
100 | { |
101 | this->r = r; this->d = d; |
102 | if (r) |
103 | connect (sender: this, SIGNAL(fired()), receiver: r, SLOT(received())); |
104 | if (d) |
105 | connect (sender: this, SIGNAL(fired()), receiver: d, SLOT(received())); |
106 | }; |
107 | |
108 | void Sender::fire () |
109 | { |
110 | ::Step++; |
111 | const int stepCopy = ::Step; |
112 | TRACE (step: stepCopy, name: "Sender::fire()" ); |
113 | if (::Step != 1 && ::Step != 3) |
114 | qFatal(msg: "%s: Incorrect Step: %d (should be 1 or 3)" , Q_FUNC_INFO, ::Step); |
115 | |
116 | emit fired (); |
117 | TRACE (step: stepCopy, name: "ends Sender::fire()" ); |
118 | } |
119 | |
120 | int main (int argc, char *argv []) |
121 | { |
122 | QCoreApplication app (argc, argv); |
123 | |
124 | Receiver r; |
125 | Disconnector d; |
126 | Sender s (&r, &d); |
127 | |
128 | r.s = &s; |
129 | d.s = &s; |
130 | |
131 | ::Step = 0; |
132 | s.fire (); |
133 | return 0; |
134 | } |
135 | |