Qt 4.8
Functions | Variables
qdbus_symbols.cpp File Reference
#include <QtCore/qglobal.h>
#include <QtCore/qlibrary.h>
#include <QtCore/qmutex.h>
#include <private/qmutexpool_p.h>

Go to the source code of this file.

Functions

bool qdbus_loadLibDBus ()
 
void * qdbus_resolve_conditionally (const char *name)
 
void * qdbus_resolve_me (const char *name)
 
void qdbus_unloadLibDBus ()
 

Variables

static QLibrary * qdbus_libdbus = 0
 

Function Documentation

◆ qdbus_loadLibDBus()

bool qdbus_loadLibDBus ( )

Definition at line 63 of file qdbus_symbols.cpp.

Referenced by QDBusConnection::connectToBus(), QDBusConnection::connectToPeer(), QDBusArgumentPrivate::createSignature(), qdbus_resolve_conditionally(), qdbus_resolve_me(), QDBusArgument::QDBusArgument(), QDBusServer::QDBusServer(), and QDBusMessagePrivate::toDBusMessage().

64 {
65  static volatile bool triedToLoadLibrary = false;
66 #ifndef QT_NO_THREAD
67  QMutexLocker locker(QMutexPool::globalInstanceGet((void *)&qdbus_resolve_me));
68 #endif
69  QLibrary *&lib = qdbus_libdbus;
70  if (triedToLoadLibrary)
71  return lib && lib->isLoaded();
72 
73  lib = new QLibrary;
74  triedToLoadLibrary = true;
75 
76  static int majorversions[] = { 3, 2, -1 };
77  lib->unload();
78  lib->setFileName(QLatin1String("dbus-1"));
79  lib->setLoadHints(QLibrary::ImprovedSearchHeuristics);
80  for (uint i = 0; i < sizeof(majorversions) / sizeof(majorversions[0]); ++i) {
81  lib->setFileNameAndVersion(lib->fileName(), majorversions[i]);
82  if (lib->load() && lib->resolve("dbus_connection_open_private"))
83  return true;
84 
85  lib->unload();
86  }
87 
88  delete lib;
89  lib = 0;
90  return false;
91 }
QLibrary::fileName
QString fileName
the file name of the library
Definition: qlibrary.h:65
QLibrary::setFileNameAndVersion
void setFileNameAndVersion(const QString &fileName, int verNum)
Sets the fileName property and major version number to fileName and versionNumber respectively...
Definition: qlibrary.cpp:1092
qdbus_resolve_me
void * qdbus_resolve_me(const char *name)
Definition: qdbus_symbols.cpp:100
QLibrary::unload
bool unload()
Unloads the library and returns true if the library could be unloaded; otherwise returns false...
Definition: qlibrary.cpp:934
QLatin1String
QLatin1String(DBUS_INTERFACE_DBUS))) Q_GLOBAL_STATIC_WITH_ARGS(QString
QLibrary::resolve
void * resolve(const char *symbol)
Returns the address of the exported symbol symbol.
Definition: qlibrary.cpp:1155
QLibrary::isLoaded
bool isLoaded() const
Returns true if the library is loaded; otherwise returns false.
Definition: qlibrary.cpp:948
QLibrary::setFileName
void setFileName(const QString &fileName)
Definition: qlibrary.cpp:1058
uint
unsigned int uint
Definition: qglobal.h:996
qdbus_libdbus
static QLibrary * qdbus_libdbus
Definition: qdbus_symbols.cpp:55
QMutexLocker
The QMutexLocker class is a convenience class that simplifies locking and unlocking mutexes...
Definition: qmutex.h:101
QLibrary::load
bool load()
Loads the library and returns true if the library was loaded successfully; otherwise returns false...
Definition: qlibrary.cpp:909
QLibrary::setLoadHints
void setLoadHints(LoadHints hints)
Definition: qlibrary.cpp:1304
QMutexPool::globalInstanceGet
static QMutex * globalInstanceGet(const void *address)
Returns a QMutex from the global mutex pool.
Definition: qmutexpool.cpp:150
QLibrary
The QLibrary class loads shared libraries at runtime.
Definition: qlibrary.h:62

◆ qdbus_resolve_conditionally()

void* qdbus_resolve_conditionally ( const char *  name)

Definition at line 93 of file qdbus_symbols.cpp.

Referenced by connectionCapabilies().

94 {
95  if (qdbus_loadLibDBus())
96  return qdbus_libdbus->resolve(name);
97  return 0;
98 }
QLibrary::resolve
void * resolve(const char *symbol)
Returns the address of the exported symbol symbol.
Definition: qlibrary.cpp:1155
name
const char * name
Definition: qkeysequence.cpp:396
qdbus_libdbus
static QLibrary * qdbus_libdbus
Definition: qdbus_symbols.cpp:55
qdbus_loadLibDBus
bool qdbus_loadLibDBus()
Definition: qdbus_symbols.cpp:63

◆ qdbus_resolve_me()

void * qdbus_resolve_me ( const char *  name)

Definition at line 100 of file qdbus_symbols.cpp.

Referenced by qdbus_loadLibDBus().

101 {
102  void *ptr = 0;
103  if (!qdbus_loadLibDBus())
104  qFatal("Cannot find libdbus-1 in your system to resolve symbol '%s'.", name);
105 
106  ptr = qdbus_libdbus->resolve(name);
107  if (!ptr)
108  qFatal("Cannot resolve '%s' in your libdbus-1.", name);
109 
110  return ptr;
111 }
QLibrary::resolve
void * resolve(const char *symbol)
Returns the address of the exported symbol symbol.
Definition: qlibrary.cpp:1155
name
const char * name
Definition: qkeysequence.cpp:396
ptr
const T * ptr(const T &t)
Definition: qdirectfbpaintengine.cpp:1498
qdbus_libdbus
static QLibrary * qdbus_libdbus
Definition: qdbus_symbols.cpp:55
qFatal
Q_CORE_EXPORT void qFatal(const char *,...)
qdbus_loadLibDBus
bool qdbus_loadLibDBus()
Definition: qdbus_symbols.cpp:63

◆ qdbus_unloadLibDBus()

void qdbus_unloadLibDBus ( )

Definition at line 57 of file qdbus_symbols.cpp.

Referenced by qdbus_resolve_me().

58 {
59  delete qdbus_libdbus;
60  qdbus_libdbus = 0;
61 }
qdbus_libdbus
static QLibrary * qdbus_libdbus
Definition: qdbus_symbols.cpp:55

Variable Documentation

◆ qdbus_libdbus

QLibrary* qdbus_libdbus = 0
static

Definition at line 55 of file qdbus_symbols.cpp.

Referenced by qdbus_loadLibDBus(), and qdbus_unloadLibDBus().

Qt 4.8 Source Code Browser