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From: gregg@cbnewsc.ATT.COM (gregg.g.wonderly)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Suggestions for a kill command
Message-ID: <3946@cbnewsc.ATT.COM>
Date: 18 Oct 89 01:56:38 GMT
References: <7238@sdcsvax.UCSD.Edu>
Organization: AT&T Bell Laboratories
Lines: 28

The really silly thing is that the O/S already knows that we have a
resource, that is its job, why can't a sys_exit() routine be supplied
with DOS that does all of the cleanup?  The UN*X notion of everything
being a file that the process must open or close certainly make life
simpler.  Why can't each resource in amiga-dos have a resource address
that is put into an array of per process resource pointers at the time
that it is allocated?  An O/S routine call  of the form

	add_resource(TaskPtr, ResourcePtr)

would add a resource to the list of the PROCESS indicated by the TaskPtr.
When a process exits (tasks calling sys_exit() cause a cooresponding
per-process task counter to be decremented, when it is zero, process
exit work is done), all associated cleanup could be done by having the
O/S do somthing like the following

	for (i=0; i < TaskPtr->resource_cnt; ++i)
		(*TaskPtr->res_list[i]->freeproc)(TaskPtr, TaskPtr->res_list[i])

Presto, everything always gets cleaned up!  What's the problem with
with something like this?  Seems rather silly for us to be banging
our heads against the wall and rebooting all the time when this kind
of stuff is what O/S's are supposed to do for us!

Gregg Wonderly
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gregg.g.wonderly@att.com   (AT&T bell laboratories)