コード例 #1
0
ファイル: qlibrary_win.cpp プロジェクト: ghjinlei/qt5
bool QLibraryPrivate::load_sys()
{
    //avoid 'Bad Image' message box
    UINT oldmode = SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOOPENFILEERRORBOX);

    // We make the following attempts at locating the library:
    //
    // WinCE
    // if (absolute)
    //     fileName
    //     fileName + ".dll"
    // else
    //     fileName + ".dll"
    //     fileName
    //     QFileInfo(fileName).absoluteFilePath()
    //
    // Windows
    // if (absolute)
    //     fileName
    //     fileName + ".dll"
    // else
    //     fileName + ".dll"
    //     fileName
    //
    // NB If it's a plugin we do not ever try the ".dll" extension
    QStringList attempts;

    if (pluginState != IsAPlugin)
        attempts.append(fileName + QLatin1String(".dll"));

    // If the fileName is an absolute path we try that first, otherwise we
    // use the system-specific suffix first
    QFileSystemEntry fsEntry(fileName);
    if (fsEntry.isAbsolute()) {
        attempts.prepend(fileName);
    } else {
        attempts.append(fileName);
#if defined(Q_OS_WINCE)
        attempts.append(QFileInfo(fileName).absoluteFilePath());
#endif
    }

    Q_FOREACH (const QString &attempt, attempts) {
        pHnd = LoadLibrary((wchar_t*)QDir::toNativeSeparators(attempt).utf16());

        // If we have a handle or the last error is something other than "unable
        // to find the module", then bail out
        if (pHnd || ::GetLastError() != ERROR_MOD_NOT_FOUND)
            break;
    }
コード例 #2
0
bool QLibraryPrivate::load_sys()
{
    QString attempt;
#if !defined(QT_NO_DYNAMIC_LIBRARY)
    QFileSystemEntry fsEntry(fileName);

    QString path = fsEntry.path();
    QString name = fsEntry.fileName();
    if (path == QLatin1String(".") && !fileName.startsWith(path))
        path.clear();
    else
        path += QLatin1Char('/');

    QStringList suffixes;
    QStringList prefixes;
    if (pluginState != IsAPlugin) {
        prefixes << QLatin1String("lib");
#if defined(Q_OS_HPUX)
        // according to
        // http://docs.hp.com/en/B2355-90968/linkerdifferencesiapa.htm

        // In PA-RISC (PA-32 and PA-64) shared libraries are suffixed
        // with .sl. In IPF (32-bit and 64-bit), the shared libraries
        // are suffixed with .so. For compatibility, the IPF linker
        // also supports the .sl suffix.

        // But since we don't know if we are built on HPUX or HPUXi,
        // we support both .sl (and .<version>) and .so suffixes but
        // .so is preferred.
# if defined(__ia64)
        if (!fullVersion.isEmpty()) {
            suffixes << QString::fromLatin1(".so.%1").arg(fullVersion);
        } else {
            suffixes << QLatin1String(".so");
        }
# endif
        if (!fullVersion.isEmpty()) {
            suffixes << QString::fromLatin1(".sl.%1").arg(fullVersion);
            suffixes << QString::fromLatin1(".%1").arg(fullVersion);
        } else {
            suffixes << QLatin1String(".sl");
        }
#elif defined(Q_OS_AIX)
        suffixes << ".a";

#else
        if (!fullVersion.isEmpty()) {
            suffixes << QString::fromLatin1(".so.%1").arg(fullVersion);
        } else {
            suffixes << QLatin1String(".so");
        }
#endif
# ifdef Q_OS_MAC
        if (!fullVersion.isEmpty()) {
            suffixes << QString::fromLatin1(".%1.bundle").arg(fullVersion);
            suffixes << QString::fromLatin1(".%1.dylib").arg(fullVersion);
        } else {
            suffixes << QLatin1String(".bundle") << QLatin1String(".dylib");
        }
#endif
    }
    int dlFlags = 0;
#if defined(QT_HPUX_LD)
    dlFlags = DYNAMIC_PATH | BIND_NONFATAL;
    if (loadHints & QLibrary::ResolveAllSymbolsHint) {
        dlFlags |= BIND_IMMEDIATE;
    } else {
        dlFlags |= BIND_DEFERRED;
    }
#else
    if (loadHints & QLibrary::ResolveAllSymbolsHint) {
        dlFlags |= RTLD_NOW;
    } else {
        dlFlags |= RTLD_LAZY;
    }
    if (loadHints & QLibrary::ExportExternalSymbolsHint) {
        dlFlags |= RTLD_GLOBAL;
    }
#if !defined(Q_OS_CYGWIN)
    else {
#if defined(Q_OS_MAC)
        if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_4)
#endif
            dlFlags |= RTLD_LOCAL;
    }
#endif

    // Provide access to RTLD_NODELETE flag on Unix
    // From GNU documentation on RTLD_NODELETE:
    // Do not unload the library during dlclose(). Consequently, the
    // library's specific static variables are not reinitialized if the
    // library is reloaded with dlopen() at a later time.
#ifdef RTLD_NODELETE
    if (loadHints & QLibrary::PreventUnloadHint) {
        dlFlags |= RTLD_NODELETE;
    }
#endif

#if defined(Q_OS_AIX)	// Not sure if any other platform actually support this thing.
    if (loadHints & QLibrary::LoadArchiveMemberHint) {
        dlFlags |= RTLD_MEMBER;
    }
#endif
#endif // QT_HPUX_LD

    // If the filename is an absolute path then we want to try that first as it is most likely
    // what the callee wants. If we have been given a non-absolute path then lets try the
    // native library name first to avoid unnecessary calls to dlopen().
    if (fsEntry.isAbsolute()) {
        suffixes.prepend(QString());
        prefixes.prepend(QString());
    } else {
        suffixes.append(QString());
        prefixes.append(QString());
    }

    bool retry = true;
    for(int prefix = 0; retry && !pHnd && prefix < prefixes.size(); prefix++) {
        for(int suffix = 0; retry && !pHnd && suffix < suffixes.size(); suffix++) {
            if (!prefixes.at(prefix).isEmpty() && name.startsWith(prefixes.at(prefix)))
                continue;
            if (!suffixes.at(suffix).isEmpty() && name.endsWith(suffixes.at(suffix)))
                continue;
            if (loadHints & QLibrary::LoadArchiveMemberHint) {
                attempt = name;
                int lparen = attempt.indexOf(QLatin1Char('('));
                if (lparen == -1)
                    lparen = attempt.count();
                attempt = path + prefixes.at(prefix) + attempt.insert(lparen, suffixes.at(suffix));
            } else {
                attempt = path + prefixes.at(prefix) + name + suffixes.at(suffix);
            }
#if defined(QT_HPUX_LD)
            pHnd = (void*)shl_load(QFile::encodeName(attempt), dlFlags, 0);
#else
            pHnd = dlopen(QFile::encodeName(attempt), dlFlags);
#endif

            if (!pHnd && fileName.startsWith(QLatin1Char('/')) && QFile::exists(attempt)) {
                // We only want to continue if dlopen failed due to that the shared library did not exist.
                // However, we are only able to apply this check for absolute filenames (since they are
                // not influenced by the content of LD_LIBRARY_PATH, /etc/ld.so.cache, DT_RPATH etc...)
                // This is all because dlerror is flawed and cannot tell us the reason why it failed.
                retry = false;
            }
        }
    }

#ifdef Q_OS_MAC
    if (!pHnd) {
        QByteArray utf8Bundle = fileName.toUtf8();
        QCFType<CFURLRef> bundleUrl = CFURLCreateFromFileSystemRepresentation(NULL, reinterpret_cast<const UInt8*>(utf8Bundle.data()), utf8Bundle.length(), true);
        QCFType<CFBundleRef> bundle = CFBundleCreate(NULL, bundleUrl);
        if(bundle) {
            QCFType<CFURLRef> url = CFBundleCopyExecutableURL(bundle);
            char executableFile[FILENAME_MAX];
            CFURLGetFileSystemRepresentation(url, true, reinterpret_cast<UInt8*>(executableFile), FILENAME_MAX);
            attempt = QString::fromUtf8(executableFile);
            pHnd = dlopen(QFile::encodeName(attempt), dlFlags);
        }
    }
#endif
#endif // QT_NO_DYNAMIC_LIBRARY
    if (!pHnd) {
        errorString = QLibrary::tr("Cannot load library %1: %2").arg(fileName).arg(qdlerror());
    }
    if (pHnd) {
        qualifiedFileName = attempt;
        errorString.clear();
    }
    return (pHnd != 0);
}