kernel/file_cache/launch_speedup.cpp

6 /** This module memorizes all opened files for a certain session. A session
8  *	When a session is started, it will prefetch all files from an earlier
9  *	session in order to speed up the launching or booting process.
182 	bool Compare(KeyType key, ValueType* session) const
184 		return (session->NodeRef().device == key.device
185 			&& session->NodeRef().node == key.node);
211 	bool Compare(KeyType key, ValueType* session) const
213 		return session->Team == key;
226 stop_session(Session *session)
228 	if (session == NULL)
231 	TRACE(("stop_session(%s)\n", session->Name()));
233 	if (session->IsWorthSaving())
234 		session->Save();
239 		if (session->Team() >= B_OK)
240 			sTeamHash->Remove(session);
242 		if (session == sMainSession)
246 	delete session;
256 	Session *session = new Session(team, name, device, node, seconds);
257 	if (session == NULL)
260 	if (session->InitCheck() != B_OK || session->StartWatchingTeam() != B_OK) {
261 		delete session;
265 	// let's see if there is a prefetch session for this session
268 	if (session->IsMainSession()) {
269 		// search for session by name
274 				// found session!
279 		// ToDo: search for session by device/node ID
283 		TRACE(("found prefetch session %s\n", prefetchSession->Name()));
288 		sTeamHash->Insert(session);
290 	session->Lock();
291 	return session;
298 	Session *session = (Session *)_session;
300 	session->Lock();
301 	stop_session(session);
349 		Session *session = new Session(dirent->d_name);
351 		if (session->LoadFromDirectory(dirfd(dir)) != B_OK) {
352 			delete session;
356 		if (session->IsMainSession()) {
357 			session->Next() = sMainPrefetchSessions;
358 			sMainPrefetchSessions = session;
360 			sPrefetchHash->Insert(session);
389 	mutex_init(&fLock, "launch speedup session");
401 	TRACE(("start session %ld:%lld \"%s\", system_time: %lld, active until: %lld\n",
536 	TRACE(("load session %s\n", Name()));
721 	Session *session;
722 	SessionGetter getter(team_get_current_team_id(), &session);
724 	if (session == NULL) {
730 		// create new session for this team
731 		getter.New(name, device, node, &session);
734 	if (session == NULL || !session->IsActive()) {
736 			// ToDo: this opens a race condition with the "stop session" syscall
742 	session->AddNode(device, node);
750 	Session *session;
751 	SessionGetter getter(team_get_current_team_id(), &session);
753 	if (session == NULL)
757 		session->RemoveNode(device, node);
815 	Session *session = sTeamHash->Clear(true);
816 	while (session != NULL) {
817 		Session *next = session->next;
818 		delete session;
819 		session = next;
821 	session = sPrefetchHash->Clear(true);
822 	while (session != NULL) {
823 		Session *next = session->next;
824 		delete session;
825 		session = next;
830 	for (session = sMainPrefetchSessions; session != NULL; ) {
831 		sMainPrefetchSessions = session->Next();
832 		delete session;
833 		session = sMainPrefetchSessions;
871 	// start boot session