Re: [Boost-bugs] [Boost C++ Libraries] #4413: wait_for_any hangs up on empty intervals.

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4413: wait_for_any hangs up on empty intervals.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-07-10 10:22:36

#4413: wait_for_any hangs up on empty intervals.
---------------------------+------------------------------------------------
  Reporter:  ivg@…         |       Owner:  anthonyw
      Type:  Bugs          |      Status:  closed  
 Milestone:  Boost 1.44.0  |   Component:  thread  
   Version:  Boost 1.44.0  |    Severity:  Problem 
Resolution:  fixed         |    Keywords:          
---------------------------+------------------------------------------------

Comment (by ivg@…):

 Replying to [comment:1 steven_watanabe]:
 > I'm not sure that wait_for_any with an empty range should be supported.
 Since there are no elements in the range, the conditions under which it
 should wake up are never satisfied.

 The same logic can be applied to a `std::find`. If a range is empty, then
 there are no elements in the range that can satisfy a predicate. So we can
 hang over, or remove all data on a hard disk...
 Please, look at STL - every algorithm that returns an iterator, will
 return the last iterator (or the first) of the range, and will not hang
 up. It is idiomatic for algorithms to accept an empty range. This is what
 most programmers would expect from this function and all other functions
 that have an iterator based input.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4413#comment:3>
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