Opened 7 years ago

Last modified 6 years ago

#6325 new Support Requests

InterlockedExchangeAdd improperly identified as managed code.

Reported by: filmorependrgn@… Owned by: chris_kohlhoff
Milestone: To Be Determined Component: asio
Version: Boost 1.48.0 Severity: Problem
Keywords: InterlockedExchangeAdd Cc:


There is a Microsoft C++ bug that causes InterlockedExchangeAdd? to improperly be identified as managed code instead of native code. A workaround is mentioned here:

This prevents programs from being compiled correctly in VS2010

The workaround is implemented below:


return (1?::InterlockedExchangeAdd(&terminate_threads_, 0) != 0: 0!= InterlockedExchangeAdd64((volatile LONG64 *)0,(LONG64) 0));



long result = (1?::InterlockedExchangeAdd(&d.result_, 0) : InterlockedExchangeAdd64((volatile LONG64 *)0,(LONG64) 0));

Implementing the above fix allows the programs to compile with a warning:

warning C4793: 'boost::asio::detail::win_thread_base<boost::asio::detail::win_thread>::terminate_threads' : function compiled as native :
1>  	Found an intrinsic not supported in managed code


warning C4793: 'boost::asio::detail::winsock_init_base::throw_on_error' : function compiled as native :
1>  	Found an intrinsic not supported in managed code

This is a workaround for a compiler bug, so I don't know how the boost development team wants to treat this.

Using VS2010 compiling for a 64-bit target (amd64)

Change History (3)

comment:1 Changed 7 years ago by chris_kohlhoff

This fix is not ok. The InterlockedExchangeAdd64 function is only available from Windows Vista on. Please propose an alternative patch.

comment:2 Changed 6 years ago by anonymous

This bug still exists in VS2012. I have solved my issue using:

#pragma managed(push, off)

LONG CTimerBase::GetCount?() {

return InterlockedExchangeAdd?( &m_mutexCount, 0 );


#pragma managed(pop)

comment:3 Changed 6 years ago by chris_kohlhoff

Can you please confirm whether this patch would fix the issue (without breaking anything else)?

Index: boost/asio/detail/pop_options.hpp
--- boost/asio/detail/pop_options.hpp   (revision 84379)
+++ boost/asio/detail/pop_options.hpp   (working copy)
@@ -94,5 +94,8 @@
 # pragma warning (pop)
 # pragma pack (pop)
+# if (_MSC_VER >= 1300)
+#  pragma managed (pop)
+# endif
Index: boost/asio/detail/push_options.hpp
--- boost/asio/detail/push_options.hpp  (revision 84379)
+++ boost/asio/detail/push_options.hpp  (working copy)
@@ -123,5 +123,8 @@
 # if !defined(_MT)
 #  error Multithreaded RTL must be selected.
 # endif // !defined(_MT)
+# if (_MSC_VER >= 1300)
+#  pragma managed (push, off)
+# endif
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