C++ (Cpp) QFunctionPointer示例

示例#1

文件： qlibrary_unix.cpp 项目： KDE/android-qt5-qtbase

bool QLibraryPrivate::unload_sys()
{
#if !defined(QT_NO_DYNAMIC_LIBRARY)
#  if defined(QT_HPUX_LD)
    if (shl_unload((shl_t)pHnd)) {
#  else
    if (dlclose(pHnd)) {
#  endif
        errorString = QLibrary::tr("Cannot unload library %1: %2").arg(fileName).arg(qdlerror());
        return false;
    }
#endif
    errorString.clear();
    return true;
}

#ifdef Q_OS_LINUX
Q_CORE_EXPORT QFunctionPointer qt_linux_find_symbol_sys(const char *symbol)
{
    return QFunctionPointer(dlsym(RTLD_DEFAULT, symbol));
}
#endif

#ifdef Q_OS_MAC
Q_CORE_EXPORT QFunctionPointer qt_mac_resolve_sys(void *handle, const char *symbol)
{
    return QFunctionPointer(dlsym(handle, symbol));
}
#endif

QFunctionPointer QLibraryPrivate::resolve_sys(const char* symbol)
{
#if defined(QT_AOUT_UNDERSCORE)
    // older a.out systems add an underscore in front of symbols
    char* undrscr_symbol = new char[strlen(symbol)+2];
    undrscr_symbol[0] = '_';
    strcpy(undrscr_symbol+1, symbol);
    QFunctionPointer address = QFunctionPointer(dlsym(pHnd, undrscr_symbol));
    delete [] undrscr_symbol;
#elif defined(QT_HPUX_LD)
    QFunctionPointer address = 0;
    if (shl_findsym((shl_t*)&pHnd, symbol, TYPE_UNDEFINED, &address) < 0)
        address = 0;
#elif defined (QT_NO_DYNAMIC_LIBRARY)
    QFunctionPointer address = 0;
#else
    QFunctionPointer address = QFunctionPointer(dlsym(pHnd, symbol));
#endif
    if (!address) {
        errorString = QLibrary::tr("Cannot resolve symbol \"%1\" in %2: %3").arg(
                          QString::fromLatin1(symbol)).arg(fileName).arg(qdlerror());
    } else {
        errorString.clear();
    }
    return address;
}

示例#2

文件： qxcbnativeinterface.cpp 项目： Drakey83/steamlink-sdk

QFunctionPointer QXcbNativeInterface::platformFunction(const QByteArray &function) const
{
    if (function == QXcbWindowFunctions::setWmWindowTypeIdentifier()) {
        return QFunctionPointer(QXcbWindow::setWmWindowTypeStatic);
    }
    return Q_NULLPTR;
}

示例#3

文件： qeglplatformintegration.cpp 项目： James-intern/Qt

QFunctionPointer QEGLPlatformIntegration::platformFunction(const QByteArray &function) const
{
#if !defined(QT_NO_EVDEV) && (!defined(Q_OS_ANDROID) || defined(Q_OS_ANDROID_NO_SDK))
    if (function == QEglFSFunctions::loadKeymapTypeIdentifier())
        return QFunctionPointer(loadKeymapStatic);
#else
    Q_UNUSED(function)
#endif

    return 0;
}

示例#4

文件： qlibrary_unix.cpp 项目： tanaxiusi/Qt5.7.0-my-modified-version

bool QLibraryPrivate::unload_sys()
{
#if !defined(QT_NO_DYNAMIC_LIBRARY)
#  if defined(QT_HPUX_LD)
    if (shl_unload((shl_t)pHnd)) {
#  else
    if (dlclose(pHnd)) {
#  endif
#  if defined (Q_OS_QNX)              // Workaround until fixed in QNX; fixes crash in
        char *error = dlerror();      // QtDeclarative auto test "qqmlenginecleanup" for instance
        if (!qstrcmp(error, "Shared objects still referenced")) // On QNX that's only "informative"
            return true;
        errorString = QLibrary::tr("Cannot unload library %1: %2").arg(fileName)
                                                                  .arg(QLatin1String(error));
#  else
        errorString = QLibrary::tr("Cannot unload library %1: %2").arg(fileName).arg(qdlerror());
#  endif
        return false;
    }
#endif
    errorString.clear();
    return true;
}

#if defined(Q_OS_LINUX) && !defined(QT_NO_DYNAMIC_LIBRARY)
Q_CORE_EXPORT QFunctionPointer qt_linux_find_symbol_sys(const char *symbol)
{
    return QFunctionPointer(dlsym(RTLD_DEFAULT, symbol));
}
#endif

#ifdef Q_OS_MAC
Q_CORE_EXPORT QFunctionPointer qt_mac_resolve_sys(void *handle, const char *symbol)
{
    return QFunctionPointer(dlsym(handle, symbol));
}
#endif

QFunctionPointer QLibraryPrivate::resolve_sys(const char* symbol)
{
#if defined(QT_AOUT_UNDERSCORE)
    // older a.out systems add an underscore in front of symbols
    char* undrscr_symbol = new char[strlen(symbol)+2];
    undrscr_symbol[0] = '_';
    strcpy(undrscr_symbol+1, symbol);
    QFunctionPointer address = QFunctionPointer(dlsym(pHnd, undrscr_symbol));
    delete [] undrscr_symbol;
#elif defined(QT_HPUX_LD)
    QFunctionPointer address = 0;
    if (shl_findsym((shl_t*)&pHnd, symbol, TYPE_UNDEFINED, &address) < 0)
        address = 0;
#elif defined (QT_NO_DYNAMIC_LIBRARY)
    QFunctionPointer address = 0;
#else
    QFunctionPointer address = QFunctionPointer(dlsym(pHnd, symbol));
#endif
    if (!address) {
        errorString = QLibrary::tr("Cannot resolve symbol \"%1\" in %2: %3").arg(
            QString::fromLatin1(symbol)).arg(fileName).arg(qdlerror());
    } else {
        errorString.clear();
    }
    return address;
}