[cpp-threads] infinite loops
Doug Lea
dl at cs.oswego.edu
Mon Jul 31 00:43:53 BST 2006
Boehm, Hans wrote:
>
> A way out of this dilemma appears to be to state that
>
> ("infinite loop restriction") Programs that contain infinite loops
> without "acquire+" operations have undefined behavior.
>
Would it suffice to instead say something (not sure how)
that amounts to the following, to avoid undefinedness?
A construction of the form
for (i=0; ; ++i) something; x = 42;
can be transformed to
x = 42; for (i=0; ; ++i) something;
if you can establish some k > 0 such that
for (i=0; i<k; ++i) something; x = 42;
can be transformed to:
x = 42; for (i=0; i<k; ++i) something;
-Doug
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