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Core: Create link file watcher on demand.

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As deletion of a QFileSystemWatcher is expensive on Linux
and has an impact on shutdown.
This commit is contained in:
Friedemann Kleint
2011-04-14 16:57:40 +02:00
parent aa2ea09496
commit c12c9f54d5
1 changed files with 39 additions and 19 deletions
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54
src/plugins/coreplugin/filemanager.cpp
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@@ -113,6 +113,8 @@ struct FileState
struct FileManagerPrivate {
explicit FileManagerPrivate(FileManager *q, QMainWindow *mw);
QFileSystemWatcher *fileWatcher();
QFileSystemWatcher *linkWatcher();
static FileManager *m_instance;
QMap<QString, FileState> m_states;
@@ -127,8 +129,8 @@ struct FileManagerPrivate {
QString m_currentFile;
QMainWindow *m_mainWindow;
QFileSystemWatcher *m_fileWatcher;
QFileSystemWatcher *m_linkWatcher;
QFileSystemWatcher *m_fileWatcher; // Delayed creation.
QFileSystemWatcher *m_linkWatcher; // Delayed creation (only UNIX/if a link is seen).
bool m_blockActivated;
QString m_lastVisitedDirectory;
QString m_projectsDirectory;
@@ -140,11 +142,37 @@ struct FileManagerPrivate {
IFile *m_blockedIFile;
};
QFileSystemWatcher *FileManagerPrivate::fileWatcher()
{
if (!m_fileWatcher) {
m_fileWatcher= new QFileSystemWatcher(m_instance);
QObject::connect(m_fileWatcher, SIGNAL(fileChanged(QString)),
m_instance, SLOT(changedFile(QString)));
}
return m_fileWatcher;
}
QFileSystemWatcher *FileManagerPrivate::linkWatcher()
{
#ifdef Q_OS_UNIX
if (!m_linkWatcher) {
m_linkWatcher = new QFileSystemWatcher(m_instance);
m_linkWatcher->setObjectName(QLatin1String("_qt_autotest_force_engine_poller"));
QObject::connect(m_linkWatcher, SIGNAL(fileChanged(QString)),
m_instance, SLOT(changedFile(QString)));
}
return m_linkWatcher;
#else
return fileWatcher();
#endif
}
FileManager *FileManagerPrivate::m_instance = 0;
FileManagerPrivate::FileManagerPrivate(FileManager *q, QMainWindow *mw) :
m_mainWindow(mw),
m_fileWatcher(new QFileSystemWatcher(q)),
m_fileWatcher(0),
m_linkWatcher(0),
m_blockActivated(false),
m_lastVisitedDirectory(QDir::currentPath()),
#ifdef Q_OS_MAC // Creator is in bizarre places when launched via finder.
@@ -155,16 +183,6 @@ FileManagerPrivate::FileManagerPrivate(FileManager *q, QMainWindow *mw) :
m_blockedIFile(0)
{
m_instance = q;
q->connect(m_fileWatcher, SIGNAL(fileChanged(QString)),
q, SLOT(changedFile(QString)));
#ifdef Q_OS_UNIX
m_linkWatcher = new QFileSystemWatcher(q);
m_linkWatcher->setObjectName(QLatin1String("_qt_autotest_force_engine_poller"));
q->connect(m_linkWatcher, SIGNAL(fileChanged(QString)),
q, SLOT(changedFile(QString)));
#else
m_linkWatcher = m_fileWatcher;
#endif
}
} // namespace Internal
@@ -248,9 +266,9 @@ void FileManager::addFileInfo(const QString &fileName, IFile *file, bool isLink)
d->m_states.insert(fileName, Internal::FileState());
if (isLink)
d->m_linkWatcher->addPath(fileName);
d->linkWatcher()->addPath(fileName);
else
d->m_fileWatcher->addPath(fileName);
d->fileWatcher()->addPath(fileName);
}
d->m_states[fileName].lastUpdatedState.insert(file, state);
}
@@ -299,8 +317,10 @@ void FileManager::dump()
qDebug() << key->fileName() << d->m_filesWithWatch.value(key);
}
qDebug() << "------- dumping watch list";
if (d->m_fileWatcher)
qDebug() << d->m_fileWatcher->files();
qDebug() << "------- dumping link watch list";
if (d->m_linkWatcher)
qDebug() << d->m_linkWatcher->files();
}
@@ -351,9 +371,9 @@ void FileManager::removeFileInfo(IFile *file)
continue;
d->m_states[fileName].lastUpdatedState.remove(file);
if (d->m_states.value(fileName).lastUpdatedState.isEmpty()) {
if (d->m_fileWatcher->files().contains(fileName))
if (d->m_fileWatcher && d->m_fileWatcher->files().contains(fileName))
d->m_fileWatcher->removePath(fileName);
if (d->m_linkWatcher->files().contains(fileName))
if (d->m_linkWatcher && d->m_linkWatcher->files().contains(fileName))
d->m_linkWatcher->removePath(fileName);
d->m_states.remove(fileName);
}