Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!helios.ee.lbl.gov!bevsun.bev.lbl.gov!lewis
From: lewis@bevsun.bev.lbl.gov (Steve Lewis)
Newsgroups: comp.realtime
Subject: Re: vxWorks memory partitions
Summary: Be careful of references
Keywords: free forget debug_cycle
Message-ID: <2606@helios.ee.lbl.gov>
Date: 11 May 89 15:54:44 GMT
References: <3213@ncar.ucar.edu> <2603@helios.ee.lbl.gov>
Sender: usenet@helios.ee.lbl.gov
Reply-To: lewis@bevsun.bev.lbl.gov (Steve Lewis)
Organization: Lawrence Berkeley Laboratory, Berkeley
Lines: 15

From conversations with developers at Wind River Systems, the vendor of
the VxWorks product, a "forget" utility is not supplied because, in the
general case, it is not possible to guarantee that some other function that
was loaded later than the candidate function is not still referencing the
latter.

However, if the intention is to unroll the most recent series of loaded
functions in strictly LIFO order, and it is guaranteed that no spawned
tasks refer to any of the nested functions, than perhaps it is a
reasonable request.

	Steve Lewis
	Project Leader, Bevalac Controls
	415/486-5831
	SALewis@lbl.gov or as above