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From: Jacob Sparre Andersen <sparre@nbi.dk>
Newsgroups: comp.lang.ada
Subject: Re: Handling transactions?
Date: Wed, 29 Jul 2015 08:51:54 +0200
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2015-07-29T08:51:54+02:00
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EGarrulo <egarrulo@gmail.com> writes:

> What is the Ada idiom to handle transactions in procedures?

To copy the data into the transaction procedure on start and out on
successful completion:

   procedure Transaction (Data: in out Some_Type) is
      Local : Some_Type := Data;
   begin
      Local.Obj_1.A;
      Local.Obj_2.B;
      Local.Obj_3.C;
      Local.Obj_4.D;

      Data := Local; --  commit
   end Transaction;

Greetings,

Jacob
-- 
"... but it was, on the other hand, very good at being a slow
 and dim-witted pupil."
"I had no idea they were supposed to be in short supply"