qdbus_symbols.cpp

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

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

2 ** -

4 ** Contact: http://www.qt.io/licensing/ -

5 ** -

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

7 ** -

8 ** $QT_BEGIN_LICENSE:LGPL21$ -

9 ** Commercial License Usage -

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

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

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

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

14 ** and conditions see http://www.qt.io/terms-conditions. For further -

15 ** information use the contact form at http://www.qt.io/contact-us. -

16 ** -

17 ** GNU Lesser General Public License Usage -

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

19 ** General Public License version 2.1 or version 3 as published by the Free -

20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and -

21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the -

22 ** following information to ensure the GNU Lesser General Public License -

23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and -

24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -

25 ** -

26 ** As a special exception, The Qt Company gives you certain additional -

27 ** rights. These rights are described in The Qt Company LGPL Exception -

28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -

29 ** -

30 ** $QT_END_LICENSE$ -

31 ** -

32 ****************************************************************************/ -

33 -

34 #include <QtCore/qglobal.h> -

35 #ifndef QT_BOOTSTRAPPED -

36 #include <QtCore/qlibrary.h> -

37 #endif -

38 #include <QtCore/qmutex.h> -

39 -

40 #ifndef QT_NO_DBUS -

41 -

42 extern "C" void dbus_shutdown(); -

43 -

44 QT_BEGIN_NAMESPACE -

45 -

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

47 -

48 #if !defined QT_LINKED_LIBDBUS -

49 -

50 #ifndef QT_NO_LIBRARY -

51 static QLibrary *qdbus_libdbus = 0; -

52 -

53 void qdbus_unloadLibDBus() -

54 { -

55 if (qdbus_libdbus) { -

56 if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN")) -

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

58 qdbus_libdbus->unload(); -

59 } -

60 delete qdbus_libdbus; -

61 qdbus_libdbus = 0; -

62 } -

63 #endif -

64 -

65 bool qdbus_loadLibDBus() -

66 { -

67 #ifndef QT_NO_LIBRARY -

68 #ifdef QT_BUILD_INTERNAL -

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

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

71 return false; -

72 #endif -

73 -

74 static bool triedToLoadLibrary = false; -

75 #ifndef QT_NO_THREAD -

76 static QBasicMutex mutex; -

77 QMutexLocker locker(&mutex); -

78 #endif -

79 -

80 QLibrary *&lib = qdbus_libdbus; -

81 if (triedToLoadLibrary) -

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

83 -

84 lib = new QLibrary; -

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

86 triedToLoadLibrary = true; -

87 -

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

89 const QString baseNames[] = { -

90 #ifdef Q_OS_WIN -

91 QLatin1String("dbus-1"), -

92 #endif -

93 QLatin1String("libdbus-1") -

94 }; -

95 -

96 lib->unload(); -

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

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

99 #ifdef Q_OS_WIN -

100 QString suffix; -

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

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

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

104 #else -

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

106 #endif -

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

108 return true; -

109 -

110 lib->unload(); -

111 } -

112 } -

113 -

114 delete lib; -

115 lib = 0; -

116 return false; -

117 #else -

118 return true; -

119 #endif -

120 } -

121 -

122 #ifndef QT_NO_LIBRARY -

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

124 { -

125 if (qdbus_loadLibDBus()) -

126 return qdbus_libdbus->resolve(name); -

127 return 0; -

128 } -

129 #endif -

130 -

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

132 { -

133 #ifndef QT_NO_LIBRARY -

134 if (!qdbus_loadLibDBus()) -

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

136 -

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

138 if (!ptr) -

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

140 -

141 return ptr; -

142 #else -

143 Q_UNUSED(name); -

144 return 0; -

145 #endif -

146 } -

147 -

148 #else -

149 static void qdbus_unloadLibDBus() -

150 { -

151

if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))

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

152

dbus_shutdown();

never executed: dbus_shutdown();

153

}

never executed: end of block

154 -

155 #endif // !QT_LINKED_LIBDBUS -

156 -

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

158

Q_DESTRUCTOR_FUNCTION(qdbus_unloadLibDBus)

never executed: end of block

159 #endif -

160 -

161 QT_END_NAMESPACE -

162 -

163 #endif // QT_NO_DBUS -

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