Re: setjmp.h

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Article #4314

#4314

From: Nick Maclaren
Date: Wed, 01 Nov 1995 16:57

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In article <815241910snz@soliton.demon.co.uk>, Ian Cargill <ian@soliton.demon.co.uk> writes:
|> 
|> The standard allows setjmp to be either a macro or an 'identifier 
|> with external linkage'.  Why the latter?   

Why not?  It allows setjmp() to be implemented entirely by the run-time
system, without any compiler involvement.  This is generally a better
way of implementing it than by using a compiler-recognised macro.


Nick Maclaren,
University of Cambridge Computer Laboratory,
New Museums Site, Pembroke Street, Cambridge CB2 3QG, England.
Email:  nmm1@cam.ac.uk
Tel.:  +44 1223 334761    Fax:  +44 1223 334679

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Path: arc1-ca.pugleaf.net!lyra.csx.cam.ac.uk!nmm1
From: nmm1@cus.cam.ac.uk (Nick Maclaren)
Newsgroups: comp.std.c
Subject: Re: setjmp.h
Date: 1 Nov 1995 16:57:39 GMT
Organization: University of Cambridge, England
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