Re: [Boost-bugs] [Boost C++ Libraries] #3848: Boost.Exception and transporting exceptions between threads

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #3848: Boost.Exception and transporting exceptions between threads
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-01-29 17:11:37

#3848: Boost.Exception and transporting exceptions between threads
--------------------------------------------------+-------------------------
  Reporter:  Nikki Chumakov <nikkikom@…>          |       Owner:  emildotchevski         
      Type:  Bugs                                 |      Status:  closed                 
 Milestone:                                       |   Component:  exception              
   Version:  Boost 1.40.0                         |    Severity:  Problem                
Resolution:  invalid                              |    Keywords:  exception thread safety
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Changes (by emildotchevski):

  * status:  reopened => closed
  * resolution:  => invalid

Comment:

 Forget about boost::exception for a moment, think about using
 exception_ptr to transfer an exception of some user-defined type between
 threads. It is incorrect to assume that copies of the exception object
 don't have shared state, or that if they do they do it in a thread-safe
 manner, because in principle exceptions are thread-local objects (note
 that using shared state is the only way non-trivial exception types can
 provide no-throw copy constructor which the C++ standard requires.)

 It is not possible for exception_ptr to help you solve this problem.

 The solution is to join the thread before rethrowing the exception. See
 http://svn.boost.org/svn/boost/trunk/libs/exception/test/exception_ptr_test.cpp.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3848#comment:5>
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