[Boost-bugs] [Boost C++ Libraries] #4167: RFC: asio::io_service::async_stop() to handle signals

Subject: [Boost-bugs] [Boost C++ Libraries] #4167: RFC: asio::io_service::async_stop() to handle signals
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-04-29 13:53:00

#4167: RFC: asio::io_service::async_stop() to handle signals
-----------------------------------+----------------------------------------
 Reporter:  giecrilj@…             |       Owner:  chris_kohlhoff
     Type:  Bugs                   |      Status:  new           
Milestone:  Boost 1.43.0           |   Component:  asio          
  Version:  Boost 1.42.0           |    Severity:  Problem       
 Keywords:  signal, event loop     |  
-----------------------------------+----------------------------------------
 == Problem statement ==
 asio::io_service has no way of stopping from within a signal handler.
 Sending a signal to a daemon is a common way to controlling its behavior
 (under POSIX).
 Calling { io_service.stop(); } from a signal handler is not guaranteed to
 be safe.

 == Implementation suggestion ==
 Declare and implement a public interface with the following semantics:

 void io_service::async_stop(void);
  /**
  Sets an internal flag in io_service to stop at the nearest event loop.
  May be called from a signal handler. */

 == Known workarounds ==
 Let the io_service listen to a pipe.  Write to the pipe from within the
 signal handler.

 == References ==
 <URL:http://article.gmane.org/gmane.comp.lib.boost.user/58164>

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4167>
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