qdbus_symbols.cpp

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/home/qt/qt5_coco/qt5/qtbase/src/dbus/qdbus_symbols.cpp

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1 /**************************************************************************** -

2 ** -

5 ** Contact: https://www.qt.io/licensing/ -

6 ** -

7 ** This file is part of the QtDBus module of the Qt Toolkit. -

8 ** -

9 ** $QT_BEGIN_LICENSE:LGPL$ -

10 ** Commercial License Usage -

11 ** Licensees holding valid commercial Qt licenses may use this file in -

12 ** accordance with the commercial license agreement provided with the -

13 ** Software or, alternatively, in accordance with the terms contained in -

14 ** a written agreement between you and The Qt Company. For licensing terms -

15 ** and conditions see https://www.qt.io/terms-conditions. For further -

16 ** information use the contact form at https://www.qt.io/contact-us. -

17 ** -

18 ** GNU Lesser General Public License Usage -

19 ** Alternatively, this file may be used under the terms of the GNU Lesser -

20 ** General Public License version 3 as published by the Free Software -

21 ** Foundation and appearing in the file LICENSE.LGPL3 included in the -

22 ** packaging of this file. Please review the following information to -

23 ** ensure the GNU Lesser General Public License version 3 requirements -

24 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -

25 ** -

26 ** GNU General Public License Usage -

27 ** Alternatively, this file may be used under the terms of the GNU -

28 ** General Public License version 2.0 or (at your option) the GNU General -

29 ** Public license version 3 or any later version approved by the KDE Free -

30 ** Qt Foundation. The licenses are as published by the Free Software -

31 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -

32 ** included in the packaging of this file. Please review the following -

33 ** information to ensure the GNU General Public License requirements will -

34 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and -

35 ** https://www.gnu.org/licenses/gpl-3.0.html. -

36 ** -

37 ** $QT_END_LICENSE$ -

38 ** -

39 ****************************************************************************/ -

40 -

41 #include <QtCore/qglobal.h> -

42 #ifndef QT_BOOTSTRAPPED -

43 #include <QtCore/qlibrary.h> -

44 #endif -

45 #include <QtCore/qmutex.h> -

46 -

47 #ifndef QT_NO_DBUS -

48 -

49 extern "C" void dbus_shutdown(); -

50 -

51 QT_BEGIN_NAMESPACE -

52 -

53 void (*qdbus_resolve_me(const char *name))(); -

54 -

55 #if !defined QT_LINKED_LIBDBUS -

56 -

57 #ifndef QT_NO_LIBRARY -

58 static QLibrary *qdbus_libdbus = 0; -

59 -

60 void qdbus_unloadLibDBus() -

61 { -

62 if (qdbus_libdbus) { -

63 if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN")) -

64 qdbus_libdbus->resolve("dbus_shutdown")(); -

65 qdbus_libdbus->unload(); -

66 } -

67 delete qdbus_libdbus; -

68 qdbus_libdbus = 0; -

69 } -

70 #endif -

71 -

72 bool qdbus_loadLibDBus() -

73 { -

74 #ifndef QT_NO_LIBRARY -

75 #ifdef QT_BUILD_INTERNAL -

76 // this is to simulate a library load failure for our autotest suite. -

77 if (!qEnvironmentVariableIsEmpty("QT_SIMULATE_DBUS_LIBFAIL")) -

78 return false; -

79 #endif -

80 -

81 static bool triedToLoadLibrary = false; -

82 #ifndef QT_NO_THREAD -

83 static QBasicMutex mutex; -

84 QMutexLocker locker(&mutex); -

85 #endif -

86 -

87 QLibrary *&lib = qdbus_libdbus; -

88 if (triedToLoadLibrary) -

89 return lib && lib->isLoaded(); -

90 -

91 lib = new QLibrary; -

92 lib->setLoadHints(QLibrary::ExportExternalSymbolsHint); // make libdbus symbols available for apps that need more advanced control over the dbus -

93 triedToLoadLibrary = true; -

94 -

95 static int majorversions[] = { 3, 2, -1 }; -

96 const QString baseNames[] = { -

97 #ifdef Q_OS_WIN -

98 QLatin1String("dbus-1"), -

99 #endif -

100 QLatin1String("libdbus-1") -

101 }; -

102 -

103 lib->unload(); -

104 for (uint i = 0; i < sizeof(majorversions) / sizeof(majorversions[0]); ++i) { -

105 for (uint j = 0; j < sizeof(baseNames) / sizeof(baseNames[0]); ++j) { -

106 #ifdef Q_OS_WIN -

107 QString suffix; -

108 if (majorversions[i] != -1) -

109 suffix = QString::number(- majorversions[i]); // negative so it prepends the dash -

110 lib->setFileName(baseNames[j] + suffix); -

111 #else -

112 lib->setFileNameAndVersion(baseNames[j], majorversions[i]); -

113 #endif -

114 if (lib->load() && lib->resolve("dbus_connection_open_private")) -

115 return true; -

116 -

117 lib->unload(); -

118 } -

119 } -

120 -

121 delete lib; -

122 lib = 0; -

123 return false; -

124 #else -

125 return true; -

126 #endif -

127 } -

128 -

129 #ifndef QT_NO_LIBRARY -

130 void (*qdbus_resolve_conditionally(const char *name))() -

131 { -

132 if (qdbus_loadLibDBus()) -

133 return qdbus_libdbus->resolve(name); -

134 return 0; -

135 } -

136 #endif -

137 -

138 void (*qdbus_resolve_me(const char *name))() -

139 { -

140 #ifndef QT_NO_LIBRARY -

141 if (Q_UNLIKELY(!qdbus_loadLibDBus())) -

142 qFatal("Cannot find libdbus-1 in your system to resolve symbol '%s'.", name); -

143 -

144 QFunctionPointer ptr = qdbus_libdbus->resolve(name); -

145 if (Q_UNLIKELY(!ptr)) -

146 qFatal("Cannot resolve '%s' in your libdbus-1.", name); -

147 -

148 return ptr; -

149 #else -

150 Q_UNUSED(name); -

151 return 0; -

152 #endif -

153 } -

154 -

155 #else -

156 static void qdbus_unloadLibDBus() -

157 { -

158

if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))

qEnvironmentVa...RCE_SHUTDOWN")	Description
TRUE	never evaluated
FALSE	never evaluated

159

dbus_shutdown();

never executed: dbus_shutdown();

160

}

never executed: end of block

161 -

162 #endif // !QT_LINKED_LIBDBUS -

163 -

164 #if defined(QT_LINKED_LIBDBUS) || !defined(QT_NO_LIBRARY) -

165

Q_DESTRUCTOR_FUNCTION(qdbus_unloadLibDBus)

never executed: end of block

166 #endif -

167 -

168 QT_END_NAMESPACE -

169 -

170 #endif // QT_NO_DBUS -

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