synchronization

I am using thread wrapper which checks if function which updates VCL (which also has some arguments) was called from main thread or not and then executes in within the context of Main thread always. It works but I want to make it simpler. The problem is that I have to repeat this code in every function which needs VCL synchronization which is prone to errors. Is there a way to make this wrapper simpler and more re-useable? Note that this particular wrapper only uses one parameter but there can be any number of parameters which are copied to TLocalArgs and passed on. Current code: boost::scoped

I am using the following spinlock approach: while(!hasPerformedAction()){ //wait for the user to perform the action //can add timer here too } setHasPerformedAction(false); return getActionPerfomed(); this basically waits for a user to perform an action and then returns it. Currently something requests an answer from the user before continuing, this is why I wait until input is received. However I was wondering if this is inefficient and if we are waiting for a while (i.e. <= 30 secs) will it slow down the pc that is running this app. Are there any other alternatives using this approach i.e.

When calling MPI_BCAST, is there any implied synchronization? For example, if the sender process were to get to the MPI_BCAST before others could it do the BCAST and then continue without any acknowledgements? Some recent tests with code like: program test include 'mpif.h' integer ierr, tid, tmp call MPI_INIT(ierr) call MPI_COMM_RANK(MPI_COMM_WORLD, tid, ierr) tmp = tid if(tid.eq.0) then call MPI_BCAST(tmp,1,MPI_INTEGER,MPI_ROOT,MPI_COMM_WORLD, ierr) else endif write(*,*) tid,'done' call MPI_FINALIZE(ierr) end shows that with two threads they both reach completion, despite only the sender

I have an app on the app store, that uses coredata as storage. I wan't to update the app with iCloud synchronization as new feature. Following apple`s sample code, I managed to have my core data storage synchronize between devices. However, I'm experiencing problems when either iCloud synchronization is turned off/on in the app on only one of the devices, or when the app is deleted from the device and the reinstalled. In both cases, data is not synchronized back to the device, although it is available just fine on a second device (which was not disabled/reinstalled). I also found that all

I would like to sync my db (tasks on my db, that have a decription, a date, a start time and an end time, and a user) with Google calendar. For sync with google i plan to use these components (of course I could somehow write the whole stuff on my own but this is something I can plan for the future now I am short of time, or in alternative can you suggest some working code that connects to google calendar to send/recieve data?). Now my main problem is not really linked to Delphi programming anyway I must ask a Delphi related questions because other questions get unviewd (like this one i asked).