thanks 4 reply. am using the language c# and using the UI components..
thanks again Biju On Thu, Mar 18, 2010 at 8:57 AM, Theraot <[email protected]> wrote: > Hello, > > First off, my apologies if I did miss-understand your question, since > english is not my main (neither my first) language. > > I think you are trying to syncronize the access to a given UI > component being acceded by two threads, and I'm taking the assumption > that you use WinForms and .NET, probably C# or VB. > > If this is the case, you must know that in normal condition only the > creator thread is allowed to access a GUI component. So, you must tell > the creator thread to do the task and return any needed values. We > often do this with BeginInvoke of the Form, doing this the calls are > queued and executed in an async and thread safety way. > > ---- > Besides that you mention something about a file... well, you can > choose to share access to a file with filestream, then handle the > exceptions, and check for the return value, that will help you sync to > your file. Also inside the file you can lock areas with the Lock > method of the same class (unlock with Unlock >-<). > > If your requirements are different, you may start by just using a lock > statement, remember to lock on a private object (no valuetype) . > Private for safety. This what's more often done, not always the best, > but always functional. And you know, what they say.. test, test, test. > > There are other method to sync, but I think this fits you as (I think) > you are new to the subject. Anyways, if you need to share info, > virtual variables and threadstatic values are safe to read (the last > one is not shared across threads :P). > > You can take an aproach to your own handling, if you write a thread > safe (with lock, may be) method that takes requests and stores them > (returns fast), and then have a walker thread that runs the > requests... in that case a ManualResetEvent may do. > > ------ > Let me mention something else, take care of storing references > indefinately, I mean because of problems with the GC. please take a > look to: > http://www.codeproject.com/KB/cs/WeakEvents.aspx > http://www.codeproject.com/KB/cs/WeakDelegateSet.aspx (review the code > if you get the time, I have strong respect to his autor). > Those are eye openers, I swear. > ------ > > Documentation here: > > (begininvoke) http://msdn.microsoft.com/en-us/library/0b1bf3y3.aspx > (async callers) http://msdn.microsoft.com/en-us/library/2e08f6yc.aspx > (manual reset event) > http://msdn.microsoft.com/en-us/library/system.threading.manualresetevent(VS.71).aspx<http://msdn.microsoft.com/en-us/library/system.threading.manualresetevent%28VS.71%29.aspx> > (threading tutorial) > http://msdn.microsoft.com/en-us/library/aa645740(VS.71).aspx<http://msdn.microsoft.com/en-us/library/aa645740%28VS.71%29.aspx> > (delegates) > http://msdn.microsoft.com/en-us/library/ms173171(VS.80).aspx<http://msdn.microsoft.com/en-us/library/ms173171%28VS.80%29.aspx> > > On 17 mar, 00:12, "BIJU A.J" <[email protected]> wrote: > > Hi > > > > thanks in advance > > I want to know the synchronization and asynchronization of threads.How to > > share one function to two thread objects.When click first Thread Start > ,the > > text file content display as a block in first text box. If click the > second > > thread start,if it syncronization, the first block in first text box and > > second block in second text box and son. > > > > if can pls send the any idea. > > > > thanks , > > > > Biju >
