Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!POSTGRES.BERKELEY.EDU!dillon
From: dillon@POSTGRES.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga.tech
Subject: Virtual Memory / doable 1.4 request / Hot links
Message-ID: <8905132203.AA27784@postgres.Berkeley.EDU>
Date: 13 May 89 22:03:06 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 19


	One other easily integratable future item that would result from
using files for VM paging (and this is definitely in the future!) would
be, just as in the UNIX mmap(2) call, the ability to access a file which
is mapped into memory and have Read/Write calls on that file get data
from memory (for mapped portions) or disk (unmapped or paged out portions)
transparently.

	That is, r/w calls return the most up to date information.  This 
would allow almost painless implementation of something similar to Apple's 
7.0 hot links.  Not only do programs have a choice of access method... map
the file into VM and/or access it with Read()/Write() calls, but it would put
all the (possibly huge) associated data into VM allowing for almost 
arbitrarily large amounts of shared data.

	Frankly, the only thing holding me back from using the clipboard now
is the memory limitation.

					-Matt