From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00,INVALID_MSGID,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,88e7ef9008757431
X-Google-Attributes: gid103376,public
From: kilgallen@eisner.decus.org (Larry Kilgallen)
Subject: Re: Function Calls by Address
Date: 1999/08/30
Message-ID: <1999Aug30.174805.1@eisner>#1/1
X-Deja-AN: 519051071
X-Nntp-Posting-Host: eisner.decus.org
References: <37CADE68.6AF06F5D@escmail.orl.lmco.com>
 <37CAEA5C.11A23940@pwfl.com> <37CAEF6C.197AA467@pwfl.com>
X-Trace: news.decus.org 936049688 9974 KILGALLEN [216.44.122.34]
Organization: LJK Software
Reply-To: Kilgallen@eisner.decus.org.nospam
Newsgroups: comp.lang.ada
Date: 1999-08-30T00:00:00+00:00
List-Id: <comp.lang.ada>

In article <37CAEF6C.197AA467@pwfl.com>, Marin David Condic <condicma@bogon.pwfl.com> writes:
> Marin David Condic wrote:
> 
>> Craig Jameson wrote:
>>
>> > Does any one know how to make dynamic function calls in Ada83.
> 
> Ooops! I just noticed that you said Ada83. There is no easy way to do this
> in Ada83.

> If you can get the 'Address to a subprogram and can figure out how to jump
> to that address within the system you're in, it should be relatively easy to
> dynamically build a list of the addresses you're interested in and jumping
> to them.

I thought the real problem described was X-windows callbacks,
in which case the Ada program does not have to do the jumping,
just supply the address.  Typically one cannot deal with X-windows
from Ada without a binding to the various X libraries, and those
who wrote the binding will typically have worked out how to feed
the X-windows system on the machine in question.  For DEC Ada on
VMS there are lots of lovely comments in the binding source that
explain the scheme.

Larry Kilgallen