Re: mutexes try_lock noexcept issue

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From	Pete Becker<pete@versatilecoding.com>
Newsgroups	comp.std.c++
Subject	Re: mutexes try_lock noexcept issue
Date	Tue, 3 Jan 2012 13:01:30 -0800 (PST)
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On 2012-01-01 22:26:47 +0000, viboes said:

>  In 30.4.1.2.2	Class recursive_mutex	[thread.mutex.recursive]
>
>  try_lock is declared as noexcept
>
>     bool try_lock() noexcept;
>
>  but 30.4.1.2.1	Class mutex declare it without noexcept
>     bool try_lock();
>
>  The same applies for timed_mutex and recursive_timed_mutex.
>
>  Shouldn't both be coherent. When could try_lock throw an exception?
>

If the mutex is already owned by the calling thread, the behavior of a
call to try_lock() is undefined. One possibility is to throw an
exception. For a recursive mutex, the behavior is well defined.

-- 
  Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)


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Thread

mutexes try_lock noexcept issue viboes<vicente.botet@wanadoo.fr> - 2012-01-01 14:26 -0800
  Re: mutexes try_lock noexcept issue Pete Becker<pete@versatilecoding.com> - 2012-01-03 13:01 -0800
    Re: mutexes try_lock noexcept issue Alexander Terekhov<terekhov@web.de> - 2012-01-11 09:58 -0800
      Re: mutexes try_lock noexcept issue Daniel Krügler<daniel.kruegler@googlemail.com> - 2012-01-14 17:16 -0800

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