Qyoto
4.0.5
Qyoto is a C# language binding for Qt
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The QLibrary class loads shared libraries at runtime. More...
Public Types | |
enum | LoadHint { ExportExternalSymbolsHint = 2, ImprovedSearchHeuristics = 8, LoadArchiveMemberHint = 4, ResolveAllSymbolsHint = 1 } |
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Public Member Functions | |
QLibrary (QObject parent=null) | |
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QLibrary (string fileName, QObject parent=null) | |
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QLibrary (string fileName, int verNum, QObject parent=null) | |
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QLibrary (string fileName, string version, QObject parent=null) | |
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override void | CreateProxy () |
new string | ErrorString () |
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new bool | IsLoaded () |
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new bool | Load () |
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new QLibrary.LoadHint | loadHints () |
new void | SetFileNameAndVersion (string fileName, int verNum) |
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new void | SetFileNameAndVersion (string fileName, string version) |
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new void | SetLoadHints (QLibrary.LoadHint hints) |
new bool | Unload () |
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new void | Dispose () |
Public Member Functions inherited from QtCore.QObject | |
QObject (QObject parent=null) | |
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new bool | BlockSignals (bool b) |
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new System.Collections.Generic.List < QObject > | Children () |
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new bool | Connect (QObject sender, string signal, string member, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection) |
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new void | DeleteLater () |
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new bool | Disconnect (QObject receiver, string member=null) |
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new bool | Disconnect (string signal=null, QObject receiver=null, string member=null) |
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new void | DumpObjectInfo () |
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new void | DumpObjectTree () |
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new System.Collections.Generic.List < QByteArray > | DynamicPropertyNames () |
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virtual bool | OnEvent (QEvent arg1) |
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virtual bool | EventFilter (QObject arg1, QEvent arg2) |
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new bool | Inherits (string classname) |
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new void | InstallEventFilter (QObject arg1) |
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new bool | IsWidgetType () |
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new void | KillTimer (int id) |
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new object | Property (string name) |
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new void | RemoveEventFilter (QObject arg1) |
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new bool | SetProperty (string name, object value) |
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new void | SetUserData (uint id, QObjectUserData data) |
new bool | SignalsBlocked () |
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new int | StartTimer (int interval) |
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new QObjectUserData | UserData (uint id) |
new void | Dispose () |
Public Member Functions inherited from QtCore.Qt | |
delegate QTextStream | FuncQTextStreamQTextStream (QTextStream qTextStream) |
delegate string | FuncStringQByteArray (QByteArray qByteArray) |
delegate QByteArray | FuncQByteArrayString (string @string) |
delegate void | ActionQtMsgTypeString (QtMsgType qtMsgType, string @string) |
delegate QObject | FuncQObject () |
Static Public Member Functions | |
static bool | IsLibrary (string fileName) |
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static string | Tr (string s, string c=null) |
static string | Tr (string s, string c, int n) |
static string | TrUtf8 (string s, string c=null) |
static string | TrUtf8 (string s, string c, int n) |
Static Public Member Functions inherited from QtCore.QObject | |
static bool | Connect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod method, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection) |
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static bool | Connect (QObject sender, string signal, QObject receiver, string member, Qt.ConnectionType arg5=Qt.ConnectionType.AutoConnection) |
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static bool | Disconnect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod member) |
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static bool | Disconnect (QObject sender, string signal, QObject receiver, string member) |
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static uint | RegisterUserData () |
static string | Tr (string s, string c=null) |
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static string | Tr (string s, string c, int n) |
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static string | TrUtf8 (string s, string c=null) |
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static string | TrUtf8 (string s, string c, int n) |
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Static Public Member Functions inherited from QtCore.Qt | |
static QDataStream | Write (QDataStream s, object p) |
static QDataStream | Write (QDataStream arg1, QSizeF arg2) |
static QTextStream | Write (QTextStream s, Qt.FuncQTextStreamQTextStream f) |
static QDataStream | Write (QDataStream arg1, QPoint arg2) |
static QDataStream | Write (QDataStream arg1, QLineF arg2) |
static QDataStream | Write (QDataStream arg1, QPointF arg2) |
static QDataStream | Write (QDataStream arg1, QChar arg2) |
static QDataStream | Write (QDataStream arg1, QByteArray arg2) |
static QDataStream | Write (QDataStream arg1, QEasingCurve arg2) |
static QDataStream | Write (QDataStream arg1, QRectF arg2) |
static QDataStream | Write (QDataStream arg1, QDateTime arg2) |
static QDataStream | Write (QDataStream arg1, QUrl arg2) |
static QDataStream | Write (QDataStream arg1, QTime arg2) |
static QDataStream | Write (QDataStream arg1, QLocale arg2) |
static QDataStream | Write (QDataStream arg1, QBitArray arg2) |
static QDataStream | Write (QDataStream arg1, QUuid arg2) |
static QDataStream | Write (QDataStream arg1, QLine arg2) |
static QDataStream | Write (QDataStream arg1, QDate arg2) |
static QDataStream | Write (QDataStream @out, QRegExp regExp) |
static QDataStream | Write (QDataStream arg1, QRect arg2) |
static QDataStream | Write (QDataStream arg1, QSize arg2) |
static QDataStream | Write (QDataStream s, QVariant.Type p) |
static QDataStream | Write (QDataStream arg1, string arg2) |
static QDataStream | Write (QDataStream @out, System.Collections.Generic.List< string > list) |
static QDataStream | Read (QDataStream arg1, QChar arg2) |
static QDataStream | Read (QDataStream arg1, QLocale arg2) |
static QDataStream | Read (QDataStream arg1, QRect arg2) |
static QDataStream | Read (QDataStream arg1, QEasingCurve arg2) |
static QDataStream | Read (QDataStream arg1, QDate arg2) |
static QDataStream | Read (QDataStream arg1, QUrl arg2) |
static QDataStream | Read (QDataStream arg1, QUuid arg2) |
static QTextStream | Read (QTextStream s, Qt.FuncQTextStreamQTextStream f) |
static QDataStream | Read (QDataStream arg1, QLineF arg2) |
static QDataStream | Read (QDataStream arg1, QRectF arg2) |
static QDataStream | Read (QDataStream arg1, QPointF arg2) |
static QDataStream | Read (QDataStream arg1, QLine arg2) |
static QDataStream | Read (QDataStream arg1, QBitArray arg2) |
static QDataStream | Read (QDataStream arg1, QSize arg2) |
static QDataStream | Read (QDataStream arg1, QDateTime arg2) |
static QDataStream | Read (QDataStream arg1, QTime arg2) |
static QDataStream | Read (QDataStream arg1, QPoint arg2) |
static QDataStream | Read (QDataStream @in, QRegExp regExp) |
static QDataStream | Read (QDataStream s, object p) |
static QDataStream | Read (QDataStream arg1, QByteArray arg2) |
static QDataStream | Read (QDataStream arg1, QSizeF arg2) |
static QDataStream | Read (QDataStream arg1, string arg2) |
static QDataStream | Read (QDataStream s, QVariant.Type p) |
static QDataStream | Read (QDataStream @in, System.Collections.Generic.List< string > list) |
static double | qAcos (double v) |
static void | qAddPostRoutine (System.Action arg1) |
static string | qAppName () |
static double | qAsin (double v) |
static double | qAtan (double v) |
static double | qAtan2 (double x, double y) |
static void | qBadAlloc () |
static int | qCeil (double v) |
static ushort | qChecksum (string s, uint len) |
static QByteArray | qCompress (QByteArray data) |
static QByteArray | qCompress (QByteArray data, int compressionLevel=-1) |
static QByteArray | qCompress (Pointer< byte > data, int nbytes) |
static QByteArray | qCompress (Pointer< byte > data, int nbytes, int compressionLevel=-1) |
static double | qCos (double v) |
static double | qExp (double v) |
static double | qFabs (double v) |
static double | qFastCos (double x) |
static double | qFastSin (double x) |
static string | qFlagLocation (string method) |
static int | qFloor (double v) |
static bool | qFuzzyCompare (double p1, double p2) |
static bool | qFuzzyCompare (float p1, float p2) |
static bool | qFuzzyIsNull (double d) |
static bool | qFuzzyIsNull (float f) |
static uint | qHash (QBitArray key) |
static uint | qHash (QChar key) |
static uint | qHash (QStringRef key) |
static uint | qHash (QUrl url) |
static uint | qHash (QPersistentModelIndex index) |
static uint | qHash (QByteArray key) |
static uint | qHash (QModelIndex index) |
static uint | qHash (uint key) |
static uint | qHash (sbyte key) |
static uint | qHash (byte key) |
static uint | qHash (short key) |
static uint | qHash (NativeLong key) |
static uint | qHash (ushort key) |
static uint | qHash (long key) |
static uint | qHash (ulong key) |
static uint | qHash (int key) |
static uint | qHash (string key) |
static uint | qHash (NativeULong key) |
static double | qInf () |
static Qt.ActionQtMsgTypeString | qInstallMsgHandler (Qt.ActionQtMsgTypeString arg1) |
static int | qIntCast (float f) |
static int | qIntCast (double f) |
static bool | qIsFinite (double d) |
static bool | qIsFinite (float f) |
static bool | qIsInf (float f) |
static bool | qIsInf (double d) |
static bool | qIsNaN (float f) |
static bool | qIsNaN (double d) |
static bool | qIsNull (float f) |
static bool | qIsNull (double d) |
static double | qLn (double v) |
static double | qPow (double x, double y) |
static double | qQNaN () |
static void | qRegisterStaticPluginInstanceFunction (Qt.FuncQObject function) |
static void | qRemovePostRoutine (System.Action arg1) |
static int | qRound (double d) |
static long | qRound64 (double d) |
static double | qSNaN () |
static bool | qSharedBuild () |
static double | qSin (double v) |
static double | qSqrt (double v) |
static bool | qStringComparisonHelper (QStringRef s1, string s2) |
static double | qTan (double v) |
static QByteArray | qUncompress (QByteArray data) |
static QByteArray | qUncompress (Pointer< byte > data, int nbytes) |
static string | qVersion () |
static void | Qbswap_helper (Pointer< byte > src, Pointer< byte > dest, int size) |
static QByteArray | Qgetenv (string varName) |
static bool | Qputenv (string varName, QByteArray value) |
static int | Qrand () |
static void | Qsrand (uint seed) |
static int | Qstrcmp (QByteArray str1, QByteArray str2) |
static int | Qstrcmp (QByteArray str1, string str2) |
static int | Qstrcmp (string str1, QByteArray str2) |
static int | Qstrcmp (string str1, string str2) |
static Pointer< sbyte > | Qstrcpy (Pointer< sbyte > dst, string src) |
static Pointer< sbyte > | Qstrdup (string arg1) |
static int | Qstricmp (string arg1, string arg2) |
static uint | Qstrlen (string str) |
static int | Qstrncmp (string str1, string str2, uint len) |
static Pointer< sbyte > | Qstrncpy (Pointer< sbyte > dst, string src, uint len) |
static int | Qstrnicmp (string arg1, string arg2, uint len) |
static uint | Qstrnlen (string str, uint maxlen) |
static string | QtTrId (string id, int n=-1) |
Protected Member Functions | |
QLibrary (System.Type dummy) | |
Protected Member Functions inherited from QtCore.QObject | |
QObject (System.Type dummy) | |
virtual void | OnChildEvent (QChildEvent arg1) |
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virtual void | ConnectNotify (string signal) |
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virtual void | OnCustomEvent (QEvent arg1) |
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new void | OnDestroyed (QObject arg1=null) |
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virtual void | DisconnectNotify (string signal) |
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new int | Receivers (string signal) |
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new QObject | Sender () |
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new int | SenderSignalIndex () |
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virtual void | OnTimerEvent (QTimerEvent arg1) |
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Properties | |
new string | FileName [get, set] |
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new LoadHint | LoadHints [get, set] |
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static new QMetaObject | StaticMetaObject [get] |
new IQLibrarySignals | Emit [get] |
Properties inherited from QtCore.QObject | |
virtual EventHandler < QEventArgs< QChildEvent > > | ChildEvent |
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virtual EventHandler < QEventArgs< QEvent > > | CustomEvent |
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virtual EventHandler < QEventArgs< QEvent > > | Event |
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virtual EventHandler < QEventArgs< QTimerEvent > > | TimerEvent |
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Slot< QObject > | DestroyedQObject |
Slot | Destroyed |
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new QObject | Parent [get, set] |
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virtual System.IntPtr | SmokeObject [get, set] |
new string | ObjectName [get, set] |
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static new QMetaObject | StaticMetaObject [get] |
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static new QMetaObject | StaticQtMetaObject [get] |
new IQObjectSignals | Emit [get] |
Additional Inherited Members | |
Protected Attributes inherited from QtCore.QObject | |
object | Q_EMIT = null |
SmokeInvocation | interceptor |
readonly List< QEventHandler > | eventFilters = new List<QEventHandler>() |
The QLibrary class loads shared libraries at runtime.
An instance of a QLibrary object operates on a single shared object file (which we call a "library", but is also known as a "DLL"). A QLibrary provides access to the functionality in the library in a platform independent way. You can either pass a file name in the constructor, or set it explicitly with setFileName(). When loading the library, QLibrary searches in all the system-specific library locations (e.g. LD_LIBRARY_PATH on Unix), unless the file name has an absolute path. If the file cannot be found, QLibrary tries the name with different platform-specific file suffixes, like ".so" on Unix, ".dylib" on the Mac, or ".dll" on Windows and Symbian. This makes it possible to specify shared libraries that are only identified by their basename (i.e. without their suffix), so the same code will work on different operating systems.
The most important functions are load() to dynamically load the library file, isLoaded() to check whether loading was successful, and resolve() to resolve a symbol in the library. The resolve() function implicitly tries to load the library if it has not been loaded yet. Multiple instances of QLibrary can be used to access the same physical library. Once loaded, libraries remain in memory until the application terminates. You can attempt to unload a library using unload(), but if other instances of QLibrary are using the same library, the call will fail, and unloading will only happen when every instance has called unload().
A typical use of QLibrary is to resolve an exported symbol in a library, and to call the C function that this symbol represents. This is called "explicit linking" in contrast to "implicit linking", which is done by the link step in the build process when linking an executable against a library.
Note: In Symbian resolving symbols using their names is supported only if the library is built as STDDLL. Otherwise ordinals must be used. Also, in Symbian the path of the library is ignored and system default library location is always used.
The following code snippet loads a library, resolves the symbol "mysymbol", and calls the function if everything succeeded. If something goes wrong, e.g. the library file does not exist or the symbol is not defined, the function pointer will be 0 and won't be called.
QLibrary myLib("mylib");
typedef void (*MyPrototype)();
MyPrototype myFunction = (MyPrototype) myLib.resolve("mysymbol");
if (myFunction)
myFunction();
The symbol must be exported as a C function from the library for resolve() to work. This means that the function must be wrapped in an extern "C" block if the library is compiled with a C++ compiler. On Windows, this also requires the use of a dllexport macro; see resolve() for the details of how this is done. For convenience, there is a static resolve() function which you can use if you just want to call a function in a library without explicitly loading the library first:
typedef void (*MyPrototype)();
MyPrototype myFunction =
(MyPrototype) QLibrary::resolve("mylib", "mysymbol");
if (myFunction)
myFunction();
See also QPluginLoader.
This enum describes the possible hints that can be used to change the way libraries are handled when they are loaded. These values indicate how symbols are resolved when libraries are loaded, and are specified using the setLoadHints() function.
See also loadHints.
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QtCore.QLibrary.QLibrary | ( | QObject | parent = null | ) |
Constructs a library with the given parent.
QtCore.QLibrary.QLibrary | ( | string | fileName, |
QObject | parent = null |
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Constructs a library object with the given parent that will load the library specified by fileName.
We recommend omitting the file's suffix in fileName, since QLibrary will automatically look for the file with the appropriate suffix in accordance with the platform, e.g. ".so" on Unix, ".dylib" on Mac OS X, and ".dll" on Windows. (See fileName.)
Note: In Symbian the path portion of the fileName is ignored.
QtCore.QLibrary.QLibrary | ( | string | fileName, |
int | verNum, | ||
QObject | parent = null |
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Constructs a library object with the given parent that will load the library specified by fileName and major version number verNum. Currently, the version number is ignored on Windows and Symbian.
We recommend omitting the file's suffix in fileName, since QLibrary will automatically look for the file with the appropriate suffix in accordance with the platform, e.g. ".so" on Unix, ".dylib" on Mac OS X, and ".dll" on Windows. (See fileName.)
Note: In Symbian the path portion of the fileName is ignored.
QtCore.QLibrary.QLibrary | ( | string | fileName, |
string | version, | ||
QObject | parent = null |
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Constructs a library object with the given parent that will load the library specified by fileName and full version number version. Currently, the version number is ignored on Windows and Symbian.
We recommend omitting the file's suffix in fileName, since QLibrary will automatically look for the file with the appropriate suffix in accordance with the platform, e.g. ".so" on Unix, ".dylib" on Mac OS X, and ".dll" on Windows. (See fileName.)
Note: In Symbian the path portion of the fileName is ignored.
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Reimplemented from QtCore.QObject.
new void QtCore.QLibrary.Dispose | ( | ) |
new string QtCore.QLibrary.ErrorString | ( | ) |
Returns a text string with the description of the last error that occurred. Currently, errorString will only be set if load(), unload() or resolve() for some reason fails.
This function was introduced in Qt 4.2.
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Returns true if fileName has a valid suffix for a loadable library; otherwise returns false.
PlatformValid suffixes
Windows .dll, .DLL
Unix/Linux .so
AIX .a
HP-UX .sl, .so (HP-UXi)
Mac OS X .dylib, .bundle, .so
Symbian .dll
Trailing versioning numbers on Unix are ignored.
new bool QtCore.QLibrary.IsLoaded | ( | ) |
Returns true if the library is loaded; otherwise returns false.
See also load().
new bool QtCore.QLibrary.Load | ( | ) |
Loads the library and returns true if the library was loaded successfully; otherwise returns false. Since resolve() always calls this function before resolving any symbols it is not necessary to call it explicitly. In some situations you might want the library loaded in advance, in which case you would use this function.
See also unload().
new QLibrary.LoadHint QtCore.QLibrary.loadHints | ( | ) |
new void QtCore.QLibrary.SetFileNameAndVersion | ( | string | fileName, |
int | verNum | ||
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Sets the fileName property and major version number to fileName and versionNumber respectively. The versionNumber is ignored on Windows and Symbian.
Note: In Symbian the path portion of the fileName is ignored.
See also setFileName().
new void QtCore.QLibrary.SetFileNameAndVersion | ( | string | fileName, |
string | version | ||
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Sets the fileName property and full version number to fileName and version respectively. The version parameter is ignored on Windows and Symbian.
Note: In Symbian the path portion of the fileName is ignored.
This function was introduced in Qt 4.4.
See also setFileName().
new void QtCore.QLibrary.SetLoadHints | ( | QLibrary.LoadHint | hints | ) |
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new bool QtCore.QLibrary.Unload | ( | ) |
Unloads the library and returns true if the library could be unloaded; otherwise returns false.
This happens automatically on application termination, so you shouldn't normally need to call this function.
If other instances of QLibrary are using the same library, the call will fail, and unloading will only happen when every instance has called unload().
Note that on Mac OS X 10.3 (Panther), dynamic libraries cannot be unloaded.
See also resolve() and load().
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This property holds the file name of the library.
We recommend omitting the file's suffix in the file name, since QLibrary will automatically look for the file with the appropriate suffix (see isLibrary()).
When loading the library, QLibrary searches in all system-specific library locations (e.g. LD_LIBRARY_PATH on Unix), unless the file name has an absolute path. After loading the library successfully, fileName() returns the fully-qualified file name of the library, including the full path to the library if one was given in the constructor or passed to setFileName().
For example, after successfully loading the "GL" library on Unix platforms, fileName() will return "libGL.so". If the file name was originally passed as "/usr/lib/libGL", fileName() will return "/usr/lib/libGL.so".
Note: In Symbian the path portion of the fileName is ignored.
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getset |
This property holds give the load() function some hints on how it should behave.
You can give some hints on how the symbols are resolved. Usually, the symbols are not resolved at load time, but resolved lazily, (that is, when resolve() is called). If you set the loadHint to ResolveAllSymbolsHint, then all symbols will be resolved at load time if the platform supports it.
Setting ExportExternalSymbolsHint will make the external symbols in the library available for resolution in subsequent loaded libraries.
If LoadArchiveMemberHint is set, the file name is composed of two components: A path which is a reference to an archive file followed by the second component which is the reference to the archive member. For instance, the fileName libGL.a(shr_64.o) will refer to the library shr_64.o in the archive file named libGL.a. This is only supported on the AIX platform.
The interpretation of the load hints is platform dependent, and if you use it you are probably making some assumptions on which platform you are compiling for, so use them only if you understand the consequences of them.
By default, none of these flags are set, so libraries will be loaded with lazy symbol resolution, and will not export external symbols for resolution in other dynamically-loaded libraries.
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staticget |