Every 1 second is not very often relative to how many operations can be done in one second by a modern PC. I can allocate/free hundreds of video frame buffers a second using barely any CPU. If your allocations are too slow (for reasons others have mentioned) then you can implement some kind of pre-allocated memory scheme. Mark Mark Salsbery Microsoft MVP - Visual C++ :java:

ginjikun wrote: i think this should be ok... ??? That works thanks to temporary CString object's constructor (it perforforms the conversion). :) If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

A named pipe certainly counts. I wouldn't think that named pipe access would be thread-safe. Proper thread safety depends on too many external factors. If you are using overlapped I/O, that changes things as well. The conservative approach would be to protect your write function with a critical section. Software Zen: delete this; Fold With Us![^]

Hi, you're welcome. ginjikun wrote: left it running for over 2 hours you could get more testing done by decreasing the time in between communications; just for testing purposes reduce the period from 1 minute to 10 seconds, or 1 second. That way a 1 hour run simulates an actual run of 6 or 60 hours... ginjikun wrote: how exported functions behave. is it blocking? is several threads of the same process, or some threads of different processes, call the same function in a (shared) DLL, then they will run any way they see fit, there is no automatic blocking, locking, synchronization, whatever; so either your code must be "thread-safe" (i.e. withstand such concurrent execution), or explicit locking must be provided. :) Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - before you ask a question here, search CodeProject, then Google - the quality and detail of your question reflects on the effectiveness of the help you are likely to get - use PRE tags to preserve formatting when showing multi-line code snippets

ginjikun wrote: hope i have explained it clear enough. What does "did not work" actually mean? "A good athlete is the result of a good and worthy opponent." - David Crow "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

You do this in C++ code. Create a vector of structs, and for each row, read the values, build an instance of the struct, and push it into the vector. Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Hi Mark. Tnx for the reply. im going to use ado. i have this sample code already... which returns only a single record. what i am doing is i just get the values of the fields i need and assign it to a variable. szSQL.Format(_T("select * from table where key='101'"); hr = pRS.CreateInstance(__uuidof(Recordset)); if (FAILED(hr)) return false; if (!pRS->adoEOF) { pFields = pRS->Fields; pField = pFields->Item[_T("id")]; _variant_t var = pField->Value; szID = TrimBSTR(var.bstrVal).copy(); pField = pFields->Item[_T("count")]; var = pField->Value; szCnt = TrimBSTR(var.bstrVal).copy(); } now what i am not sure how to do is how to map the result of the query to structs if the return is multiple records. i would like to have the results of the query be stored in an array of structs. do i do the same thing of accessing each fields and creating the struct. i was hoping there is an easier way. thanks! newbie :)

Thanks Pallini and Tim! i will try to write some code using what u have posted. thanks! newbie :)

Hi Steve! thanks for the reply! im sure your post will give me some idea and help me great deal. thanks again! newbie :)

hi manojkumarrai! thanks for the reply... for the implementation... should i have pointer to the last item for each priority category? thanks! newbie :)

tnx a lot for the answers! :) great help! newbie :)

hi Arman! tnx for the reply. oooppss... yes that should be the count... i had that in mind but when i was trying out the code didnt really put it in the implementation... tnx for the suggestion regarding vector... i'll consider it. again tnx! newbie :)

ginjikun wrote: i figured maybe i can just call readfile twice... read the header first and then the data.. since the header will also contain the size of the data struct sent.. Often, that's the only way to do it with pipes, sockets, etc. and a protocol that supports variable length data. Mark "Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

oooopppss! sorry! i did not notice the message board... i thought i was posting in vc++/mfc forum... i have reposted the qxn there... thanks for your reply! however, for the foo function... i only have 1 LPVOID paramter... thus the strHeader and dataStruct should be combined together and passed as 1 data to function Foo.... :( newbie :)

hi Mark... thanks and sorry for the wrong post... can i just continue the thread here and not repost in vc++? :) i have done a sample app of writing structs via named pipe... my trouble now is how to properly manage/convert the array of structs to LPVOID which is what i am passing to the named pipe functions (readfile/writefile)... and from LPVOID back to array of structs. or should i use a different data type and not lpvoid? thanks again! newbie :)