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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the test suite of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "signalbug.h" |
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43 |
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44 #include <qcoreapplication.h> |
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45 #include <qstring.h> |
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46 |
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47 #include <stdio.h> |
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48 |
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49 static int Step = 0; |
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50 Sender RandomSender (0, 0); |
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51 |
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52 |
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53 void TRACE (int step, const char *name) |
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54 { |
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55 for (int t = 0; t < step - 1; t++) |
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56 fprintf (stderr, "\t"); |
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57 fprintf (stderr, "Step %d: %s\n", step, name); |
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58 return; |
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59 } |
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60 |
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61 |
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62 Receiver::Receiver () |
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63 : QObject () |
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64 { |
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65 } |
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66 |
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67 void Receiver::received () |
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68 { |
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69 ::Step++; |
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70 const int stepCopy = ::Step; |
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71 TRACE (stepCopy, "Receiver::received()"); |
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72 Q_ASSERT (::Step == 2 || ::Step == 4); |
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73 |
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74 if (::Step == 2) |
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75 s->fire (); |
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76 |
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77 fprintf (stderr, "Receiver<%s>::received() sender=%s\n", |
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78 (const char *) objectName ().toAscii (), sender ()->metaObject()->className()); |
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79 |
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80 TRACE (stepCopy, "ends Receiver::received()"); |
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81 } |
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82 |
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83 |
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84 Disconnector::Disconnector () |
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85 : QObject () |
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86 { |
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87 } |
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88 |
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89 void Disconnector::received () |
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90 { |
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91 ::Step++; |
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92 const int stepCopy = ::Step; |
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93 TRACE (stepCopy, "Disconnector::received()"); |
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94 Q_ASSERT (::Step == 5 || ::Step == 6); |
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95 |
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96 fprintf (stderr, "Disconnector<%s>::received() sender=%s\n", |
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97 (const char *) objectName ().toAscii (), sender ()->metaObject()->className()); |
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98 if (sender () == 0) |
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99 fprintf (stderr, "WE SHOULD NOT BE RECEIVING THIS SIGNAL\n"); |
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100 |
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101 if (::Step == 5) |
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102 { |
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103 disconnect (s, SIGNAL (fired ()), s->d, SLOT (received ())); |
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104 |
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105 connect (&RandomSender, SIGNAL (fired ()), s->d, SLOT (received ())); |
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106 } |
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107 |
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108 TRACE (stepCopy, "ends Disconnector::received()"); |
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109 } |
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110 |
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111 |
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112 Sender::Sender (Receiver *r, Disconnector *d) |
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113 : QObject () |
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114 { |
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115 this->r = r; this->d = d; |
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116 if (r) |
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117 connect (this, SIGNAL (fired ()), r, SLOT (received ())); |
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118 if (d) |
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119 connect (this, SIGNAL (fired ()), d, SLOT (received ())); |
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120 }; |
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121 |
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122 void Sender::fire () |
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123 { |
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124 ::Step++; |
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125 const int stepCopy = ::Step; |
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126 TRACE (stepCopy, "Sender::fire()"); |
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127 Q_ASSERT (::Step == 1 || ::Step == 3); |
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128 |
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129 emit fired (); |
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130 TRACE (stepCopy, "ends Sender::fire()"); |
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131 } |
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132 |
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133 |
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134 int main (int argc, char *argv []) |
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135 { |
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136 QCoreApplication app (argc, argv); |
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137 |
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138 Receiver r; |
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139 Disconnector d; |
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140 Sender s (&r, &d); |
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141 |
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142 r.s = &s; |
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143 d.s = &s; |
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144 |
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145 |
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146 ::Step = 0; |
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147 s.fire (); |
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148 return 0; |
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149 } |
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150 |
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151 |