Short: new efun limited()
From: alfebtcd <alfebtcd@cs.tu-berlin.de>
Date: Wed, 16 Dec 1998 21:11:51 +0100 (MET)
Type: Feature
State: Done - implemented in 3.2.7-dev.131

speaking of limitation: how about a privileged efun with which you can
execute code with some limitations switched off?  at least the corelib
coders should know what they do and should not be limited by the driver
and thus forced to use ugly workarounds which are tricky and likely to
contain bugs.

	mixed limited(closure c, mapping limits);
    mixed limited(closure c, int eval_cost_limit);

this function should execute the given closure c with <limits> specifying
the limits, like read/size limits, eval-cost, etc.

This would need the various limits be stored in variables instead of
preprocessor symbols, with special 'no-limit limit' values, which are
just big enough to appear limitless while still being real limits. This
would also go a step into the direction of configuration files which are
evaluated at driver startup.

The function must be privileged.

How to handle the preprocessor symbols?