Hi,

I have a C++ DLL which has exported functions which is used in a C# application 

via DllImport. The C++ DLL is linked to various .lib files which use boost functionality (thread, asio etc) internally and are compiled with BOOST_ALL_DYN_LINK option.

When I run the application it just hangs with following stack trace. I get the same results if I convert this to a C++\CLI DLL and use it directly from the C# application.

Stack Trace:

------------------------------------------------

OneComShim.dll!boost::asio::detail::win_thread::start_thread(boost::asio::detail

::win_thread::func_base * arg=0x035574f0, unsigned int stack_size=0x00010000)  

Line 98 + 0xe bytes C++

OneComShim.dll!boost::asio::detail::win_thread::win_thread<boost::asio::detail::

win_iocp_io_service::timer_thread_function>

(boost::asio::detail::win_iocp_io_service::timer_thread_function f={...}, 

unsigned int stack_size=0x00010000)  Line 72 C++

OneComShim.dll!boost::asio::detail::win_iocp_io_service::do_add_timer_queue(boos

t::asio::detail::timer_queue_base & queue={...})  Line 471 + 0x31 bytes C++

OneComShim.dll!boost::asio::detail::win_iocp_io_service::add_timer_queue<boost::

asio::time_traits<boost::posix_time::ptime> >

(boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::pt

ime> > & queue={...})  Line 78 C++

OneComShim.dll!boost::asio::detail::deadline_timer_service<boost::asio::time_tra

its<boost::posix_time::ptime> 

>::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime> >

(boost::asio::io_service & io_service={...})  Line 68 C++

OneComShim.dll!boost::asio::deadline_timer_service<boost::posix_time::ptime,boos

t::asio::time_traits<boost::posix_time::ptime> 

>::deadline_timer_service<boost::posix_time::ptime,boost::asio::time_traits<boos

t::posix_time::ptime> >(boost::asio::io_service & io_service={...})  Line 73

C++

OneComShim.dll!boost::asio::detail::service_registry::create<boost::asio::deadli

ne_timer_service<boost::posix_time::ptime,boost::asio::time_traits<boost::posix_

time::ptime> > >(boost::asio::io_service & owner={...})  Line 81 + 0x2f bytes

C++

OneComShim.dll!boost::asio::detail::service_registry::do_use_service(const 

boost::asio::io_service::service::key & key={...}, 

boost::asio::io_service::service * (boost::asio::io_service &)* 

factory=0x100c770d)  Line 123 + 0xc bytes C++

OneComShim.dll!boost::asio::detail::service_registry::use_service<boost::asio::d

eadline_timer_service<boost::posix_time::ptime,boost::asio::time_traits<boost::p

osix_time::ptime> > >()  Line 49 C++

OneComShim.dll!boost::asio::use_service<boost::asio::deadline_timer_service<boos

t::posix_time::ptime,boost::asio::time_traits<boost::posix_time::ptime> > >

(boost::asio::io_service & ios={...})  Line 34 C++

OneComShim.dll!boost::asio::basic_io_object<boost::asio::deadline_timer_service<

boost::posix_time::ptime,boost::asio::time_traits<boost::posix_time::ptime> > 

>::basic_io_object<boost::asio::deadline_timer_service<boost::posix_time::ptime,

boost::asio::time_traits<boost::posix_time::ptime> > >(boost::asio::io_service & 

io_service={...})  Line 91 + 0x4b bytes C++

OneComShim.dll!boost::asio::basic_deadline_timer<boost::posix_time::ptime,boost:

:asio::time_traits<boost::posix_time::ptime>,boost::asio::deadline_timer_service

<boost::posix_time::ptime,boost::asio::time_traits<boost::posix_time::ptime> > 

>::basic_deadline_timer<boost::posix_time::ptime,boost::asio::time_traits<boost:

:posix_time::ptime>,boost::asio::deadline_timer_service<boost::posix_time::ptime

,boost::asio::time_traits<boost::posix_time::ptime> > >(boost::asio::io_service 

& io_service={...})  Line 147 C++

OneComShim.dll!CORE::SERVER_COMMUNICATOR::CurlHandler::CurlHandler(CORE::SERVER_

COMMUNICATOR::ServerAgent * serverAgent=0x1029c950)  Line 37 + 0x118 bytes

C++

OneComShim.dll!CORE::SERVER_COMMUNICATOR::ServerAgent::ServerAgent()  Line 22

C++

OneComShim.dll!`dynamic initializer for 

'CORE::SERVER_COMMUNICATOR::ServerAgent::agent''()  Line 17 + 0x28 bytes

C++

TestWin.exe!TestWin.Program.Main(string[] args = {string[0x00000000]}) Line 16 + 

------------------------------------------------

As it can be seen, it stops in start_thread inside win_thread.ipp at following 

lines on WaitForSingleObject

if (entry_event)

{

  ::WaitForSingleObject(entry_event, INFINITE);

  ::CloseHandle(entry_event);

}

I am just creating a timer object in the code and do not understand why it leads 

to this situation. Also everything works fine when I use a LIB instead of DLL 

and all code is in C++.

Environment details are as follows

OS: Win XP

IDE: Visual Studio 2010

Boost version: boost_1_48_0

Regards,

Chaitanya