Re: Synchronized Collection<T> Recommendation

All this locking will however slow things down for such things as
for (int i = 0; i < list.Count; i++) ...

Which will now lock every time it reads something, and what if:

Thread A increments i to the last element (count-1)
Thread B deletes the last element
Thread A tries to read the last element

In these cases I'd favor having an unsyschronized collection and having
some specified way to obtain the collection exclusivly.

It just seems to me that syncronization on such things as a collection
are very much dependent upon what the collection is storing and what the
data is being used for. Without knowing the specific case it will be
used it just seems like one cannot reliably choose the locking mechanism
or guarantee that it will even work correctly as shown in the previous
example.
.

Relevant Pages

  • Re: using clustered index to optimize inserts ...
    ... I will try to explain locking in terms of Sybase docs... ... Allpages Locking: Allpages locking locks both data pages and index ... the data page is locked with an exclusive lock. ... Clustered Index: The datarows will be arranged as per the clustered ...
    (comp.databases.sybase)
  • Re: CSingleLock - known behaviour?
    ... It is better to design code that doesn't require locking. ... If you don't need the resource, don't lock it. ... magnitude less efficient, than locking once. ...
    (microsoft.public.vc.mfc)
  • Re: Strange multi-user timing phenomenon
    ... table record with pessimistic locking and both edit the same record. ... the recordset will be sufficient to lock out other users. ... update the recordset (if you had to edit data) and then close it. ...
    (microsoft.public.access.formscoding)
  • Re: Strange multi-user timing phenomenon
    ... I tried your locking method using a perssimistic recordset and it appears to ... user places his lock and grabs the same record. ... I would try opening a fixed single-row recordset with pessimistic locking, ...
    (microsoft.public.access.formscoding)
  • [UNIX] File Locking Local Denial of Service (Sendmails Impact)
    ... Any application which uses either flockor fcntlstyle locking or ... Since this attack requires a user to use their own account to lock a file, ... process holds an exclusive lock on a file, no other process can obtain an ... File locking is used throughout Sendmail for a variety of files including ...
    (Securiteam)