jwcolby
jwcolby at colbyconsulting.com
Tue Nov 1 16:42:35 CDT 2011
I am just using filesystemwatcher. John W. Colby Colby Consulting Reality is what refuses to go away when you do not believe in it On 11/1/2011 5:33 PM, Stuart McLachlan wrote: > To quote MS: A hook is a point in the system message-handling mechanism where an > application can install a subroutine to monitor the message traffic in the system and process > certain types of messages before they reach the target window procedure. > > Is that what you are actually doing i.e. "intercepting" and acting on messages intended for > another target ? > > Or are you just using a FileSystemWatcher, which is basically a wrapper for > WaitForSingleObject in Kernel32.DLL, to monitor changes? > > If the latter, I'd say you solution is quite adequate. > > > > On 1 Nov 2011 at 15:44, jwcolby wrote: > >> I am using the directory watcher class. When the parent class to >> start, it hooks the events and when it is told to stop it unhooks the >> events. >> >> My question is simply that events are asynchronous and as such could >> occur at the same instant that the parent class is being told to stop. >> I use a boolean evFileDeletedIsRunning flag which the event sets as >> the first line inside of that event and clears as the last line of the >> event. I then check this flag before unhooking the event. >> >> Is this adequate protection? What happens if an event is unhooked >> while the event sink is running? >> Is it a page fault or something less catastrophic? >> >> -- >> John W. Colby >> Colby Consulting >> >> Reality is what refuses to go away >> when you do not believe in it >> _______________________________________________ >> dba-VB mailing list >> dba-VB at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/dba-vb >> http://www.databaseadvisors.com >> >> > > > > _______________________________________________ > dba-VB mailing list > dba-VB at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/dba-vb > http://www.databaseadvisors.com > >