volatile (in comp.lang.c)

[Bill.Stewart.<ho95c>]

In article <51437 at sun.uucp> limes at sun.UUCP (Greg Limes) writes:
:In article <2674 at geac.UUCP> daveb at geac.UUCP (David Collier-Brown) writes:
:>	1) what architectures currently use asynchronously-changing
:>memory locations for program notification of events? DEC Vax,
:>various CDC boxes, MIPS(tm),...
:... and any program with a signal handler that modifies a global
:variable, which is pretty inclusive if you ask me, .....

	Any program with a signal handler that *reads* global variables
needs the moral equivalent of volatile, if you're going to allow
optimizing compilers to avoid "redundant" writes to memory.
-- 
#				Thanks;
# Bill Stewart, AT&T Bell Labs 2G218, Holmdel NJ 1-201-949-0705 ihnp4!ho95c!wcs
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