Bugs item #2891362, was opened at 2009-11-03 17:16
Message generated for change (Comment added) made by ferrieux
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Category: 20. [interp]
Group: None
Status: Open
Resolution: None
Priority: 8
Private: No
Submitted By: Johannes13 (john13a)
Assigned to: Donal K. Fellows (dkf)
Summary: child interp with time limit does not return with eval vwait
Initial Comment:
I expect that a child interp returns after the time limit has been reached.
Short example (for tclsh)
interp create -safe test
test limit -seconds [clock add [clock seconds] 1 second]; test eval {vwait forever}
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>Comment By: Alexandre Ferrieux (ferrieux)
Date: 2009-11-04 15:34
Message:
Note that this limitation is documented in TIP #143:
"... (with a few exceptions relating to event loop handling.) ..."
Questions to dkf:
(1) any blocking syscall, not just select(), has the problem. For
select() we can solve the issue by forcing a suitable periodic wake-up (at
C level for performance, at script level as a quick fix for the OP), but do
we want that ?
(2) if the answer to (1) is Yes, is there a one-size-fits-all value for
the periodicity ? If not, maybe we'd need an extra script-level API to pass
this value ([interp limit -granularity] being only a subsampling of that),
so that (say) high-load apps could pass a longer select timeout...
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