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Library failing
by Mathew Benson
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I wrote a utility to abstract sending a data buffer to a central server with a single function call. I verified it works, and then split out the functionality into a library (.lib). I tried using it in a test application, but keep getting an "Access violation reading location 0x00000000" error. It occurs in the call:
socket_.async_receive_from( boost::asio::buffer(data_, max_length), sender_endpoint_, boost::bind(&CommIn::handle_receive_from, this, boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)); I'm using Visual C++ 2005 Express, and a UML to C++ modeler and code generator called Rhapsody. I'm not sure where to even begin troubleshooting this.
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Re: Library failing
by OvermindDL1
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On Fri, Nov 6, 2009 at 3:08 PM, Mathew Benson <mathew.benson@...> wrote:
> I wrote a utility to abstract sending a data buffer to a central server with > a single function call. I verified it works, and then split out the > functionality into a library (.lib). I tried using it in a test > application, but keep getting an "Access violation reading location > 0x00000000" error. It occurs in the call: > socket_.async_receive_from( > boost::asio::buffer(data_, max_length), sender_endpoint_, > boost::bind(&CommIn::handle_receive_from, this, > boost::asio::placeholders::error, > boost::asio::placeholders::bytes_transferred)); > I'm using Visual C++ 2005 Express, and a UML to C++ modeler and code > generator called Rhapsody. I'm not sure where to even begin troubleshooting > this. Debug into it and see what pointer is null at that call, then find out where that pointer should be set and why it is not. _______________________________________________ Boost-users mailing list Boost-users@... http://lists.boost.org/mailman/listinfo.cgi/boost-users |
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Re: Library failing
by Mathew Benson
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It took a while to figure out the parameters, but boost::bind,
boost::asio::placeholders::bytes_transferred, and boost::asio::placeholders::error were all null. I can't figure out what I d differently that it worked when is was combined but broke in a library. How do I set these? Is there a boost init call? Sent from my iPhone On Nov 6, 2009, at 7:44 PM, OvermindDL1 <overminddl1@...> wrote: > On Fri, Nov 6, 2009 at 3:08 PM, Mathew Benson > <mathew.benson@...> wrote: >> I wrote a utility to abstract sending a data buffer to a central >> server with >> a single function call. I verified it works, and then split out the >> functionality into a library (.lib). I tried using it in a test >> application, but keep getting an "Access violation reading location >> 0x00000000" error. It occurs in the call: >> socket_.async_receive_from( >> boost::asio::buffer(data_, max_length), sender_endpoint_, >> boost::bind(&CommIn::handle_receive_from, this, >> boost::asio::placeholders::error, >> boost::asio::placeholders::bytes_transferred)); >> I'm using Visual C++ 2005 Express, and a UML to C++ modeler and code >> generator called Rhapsody. I'm not sure where to even begin >> troubleshooting >> this. > > Debug into it and see what pointer is null at that call, then find out > where that pointer should be set and why it is not. > _______________________________________________ > Boost-users mailing list > Boost-users@... > http://lists.boost.org/mailman/listinfo.cgi/boost-users Boost-users mailing list Boost-users@... http://lists.boost.org/mailman/listinfo.cgi/boost-users |
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Re: Library failing
by Mathew Benson
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I've narrowed it down to something with those three attributes. I thought they were static and maybe I couldn't access static attributes in a library. I checked the boost source code and found that they are static. Is there a constraint on using static attributes within libraries? My current project only creates static libraries (.lib), though my next step is to try creating a .dll instead.
On Fri, Nov 6, 2009 at 10:56 PM, Mathew Benson <mathew.benson@...> wrote: It took a while to figure out the parameters, but boost::bind, boost::asio::placeholders::bytes_transferred, and boost::asio::placeholders::error were all null. I can't figure out what I d differently that it worked when is was combined but broke in a library. How do I set these? Is there a boost init call? _______________________________________________ Boost-users mailing list Boost-users@... http://lists.boost.org/mailman/listinfo.cgi/boost-users |
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Re: Library failing
by Igor R
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> It took a while to figure out the parameters, but boost::bind, boost::asio::placeholders::bytes_transferred, and boost::asio::placeholders::error were all null.
These parameters are not pointers, how can they be null? Try to step into async_receive_from(), theninto its implementation etc., and see what happens there. _______________________________________________ Boost-users mailing list Boost-users@... http://lists.boost.org/mailman/listinfo.cgi/boost-users |
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Re: Library failing
by Mathew Benson
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Don't know. I just mean when I try:
printf("%08x\n",&boost::asio::placeholders::error); It prints 0. This confirms the "Access violation" error that Visual C++ displays. When I try compiling it as a monolithic build without libraries, it displays the expected address and does not crash.
I already stepped into non-static functions and it works just fine. Its just the static functions and attributes that fail. On Sat, Nov 7, 2009 at 10:07 AM, Igor R <boost.lists@...> wrote:
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