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Ketan_Lalcheta1-Visitor
1-Visitor
June 13, 2016
Solved

User_terminate

  • June 13, 2016
  • 1 reply
  • 4737 views

Hello,

I am aware that user_terminate is the function where toolkit application scope ends. What I would like to do is that based on certain conditions I am planning to do in user_terminate, DLL scope sholud not be ended.

Any suggestion would be much helpful.

Let me know in case you require more explanation on this query.

Thanks and Regards

Ketan


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Best answer by GabrielZaha

I think I understand now.

First the chances that two users are trying to write to the log file in the exact same time are really small.

In the situation that simultaneous writing do happen I'd try to create a delay for one of the users.

Try the following code:

void user_terminate()
{
     ProUIMessageButton *buttons;
     ProUIMessageButton user_choice;
        Pro
     ProArrayAlloc (2, sizeof (ProUIMessageButton), 1, (ProArray*)&buttons);
     buttons[0] = PRO_UI_MESSAGE_RETRY;
     buttons[1] = PRO_UI_MESSAGE_IGNORE;

     do
               /* log writing here */
          ProUIMessageDialogDisplay (PROUIMESSAGE_ERROR,L"Message Title",L"Some message!",buttons,PRO_UI_MESSAGE_OK,&user_choice);

     while ( user_choice != PRO_UI_MESSAGE_IGNORE ) ;

     ProArrayFree ((ProArray*)&buttons);
     
     return;
}

It is very crude but I hope you will get the ideea.

You will have to put log writing sequence inside the do - while loop and to set the correct exit condition.

1 reply

G
GabrielZaha14-Alexandrite
14-Alexandrite
June 17, 2016

If I understood correctly what you are trying to do is to prevent the toolkit application to stop unless certain conditions are meet. I'm afraid that is not possible.

"user_terminate" is a void function. That mean there is no specific return value when exiting the function. Simply said there is no way to make the difference if the exit condition is true or false.

Based on the information on the user guide; "user_terminate" is executed every time the applications end. It is a good place to do some "clean-up" like deleting user-defined menus, deleting temporary files, freeing up globally defined arrays and other thing of that nature.

The important note here is that the toolkit application will end no matter the actions defined in "user_terminate" and the outcome of those actions.

    K
    Ketan_Lalcheta1-VisitorAuthor
    1-Visitor
    June 17, 2016

    Correct... I would like Auxiliary application I.e. toolkit application still be available to user based on condition from user_terminate.

    Okay...seems it's not possible.. One thing I would try to check if I can still call user_initialize from user_terminate itself so that user gets feel of running application even if user_terminate is called.

    Any thought on this?

    Thanks and Regards

    Ketan

    G
    GabrielZaha14-Alexandrite
    14-Alexandrite
    June 17, 2016

    Calling user_initalize from within the application has a high risk to lead to infinite loops, memory overflows or other things like that. I'm not saying it won't work as I never tried but personally I'd avoid this at any cost.

    In a situation similar with the one you described I think I'd take a somewhat opposite approach:

    1. Make sure the users can't stop the application. For this you need to remove "ALLOW_STOP" and "DELAY_START" lines from the toolkit registry file.

    2. Control when the commands defined by the application are available via the uiCmdAccessState functions. Let's say you define a command with the following line:

    ProCmdActionAdd("NewCommand", (uiCmdCmdActFn)NewCmdFunction,        uiProe2ndImmediate,AccessFunction, PRO_B_TRUE, PRO_B_TRUE, &cmd_id);

    The "AccessFunction" argument is the uiCmdAccessState function. Here you can define the conditions if the new command is available or not.

    For example you can make a certain function to be available only for drawings.

    Take a look at the documentation and the sample application. There are some good example of access functions there.

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