Re: problem with ada.interrupts

["jimmaureenrogers@worldnet.att.net" <jimmaureenrogers@worldnet.att.net>]

evangeli@cnam.fr wrote:
> hello
> in my program i want to catch the interruption by the user, e.g.,
> ctrl+c.
> i looked at the RM and it seems that package ada.interrupts is designed
> to do this kind of things.
> so i tested this little program (my compiler is gnat 3.15p) :
>

Consider the following statements from the Ada Reference Manual:

The form of a pragma Interrupt_Handler is as follows:

   pragma Interrupt_Handler(handler_name);

   The form of a pragma Attach_Handler is as follows:

   pragma Attach_Handler(handler_name, expression);

Name Resolution Rules

For the Interrupt_Handler and Attach_Handler pragmas, the handler_name
shall resolve to denote a protected procedure with a parameterless
profile.

For the Attach_Handler pragma, the expected type for the expression is
Interrupts.Interrupt_ID (see C.3.2).

Legality Rules

The Attach_Handler pragma is only allowed immediately within the
protected_definition where the corresponding subprogram is declared.
The corresponding protected_type_declaration or
single_protected_declaration shall be a library level declaration.

The Interrupt_Handler pragma is only allowed immediately within a
protected_definition. The corresponding protected_type_declaration
shall be a library level declaration. In addition, any
object_declaration of such a  type shall be a library level
declaration.

       -------

Your Attach_Handler pragma is misplaced.
You do not have an Interrupt_Handler pragma.

Your protected object is not defined at a library level.

Jim Rogers