[Boost-bugs] [Boost C++ Libraries] #2835: basic_stream_socket::available() does not work reliably

Subject: [Boost-bugs] [Boost C++ Libraries] #2835: basic_stream_socket::available() does not work reliably
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-03-05 23:17:37

#2835: basic_stream_socket::available() does not work reliably
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 Reporter:  sidharth_at_[hidden]  |       Owner:         
     Type:  Bugs                    |      Status:  new    
Milestone:  Boost 1.39.0            |   Component:  None   
  Version:  Boost 1.38.0            |    Severity:  Problem
 Keywords:                          |  
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 basic_stream_socket::available() often reports 0 bytes even when there is
 data available to be read.

 The implementation of basic_stream_socket::available() for windows uses
 ioctlsocket() with FIONREAD which Microsoft advises against using.
 (recv(MSG_PEEK) is not prescribed either).

 http://support.microsoft.com/kb/192599


 For clients wanting to poll for available data and then calling a blocking
 read, barring any other reliable way to peek for data availability, it
 would be better to have an isavailable() (based on select()) which a
 client could call before doing a read_some.

 I realize the root cause is a Microsoft issue, but it's a boost asio bug
 at the end of the day.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2835>
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