multithreading - boost mutex C++/CLI problems

Question

I'm developing in Visual Studio 2008 C# for 64bit and I want to use to use a library which uses boost. So I wrote a wrapper in C++/CLI. I managed to target the error I get to

#include <boost/thread/mutex.hpp>.

If I include any file in my C++/CLI wrapper that by itself includes <boost/thread/mutex.hpp> or if I include it directly in the wrapper I get a "System.AccessViolationException" "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

I was very carefull in building everything for 64bit so I doubt that the problems is there. When I use the same library in 64 bit in "plain" C++ everything works fine. I came over a couple of posts where people seem to have similar problems with boost threads but none of the solutions I found worked. Does anyone have an idea?

Answer 1

The problem is that boost.thread uses some #pragma section directives that are incompatible when built without /clr then statically linked to code that uses /clr.

I've heard that rebuilding boost.thread with /clr (i.e., pass cxxflags="/clr" when invoking bjam) fixes the issue, but I haven't tried it personally.

I assume that dynamically linking to boost.thread (rather than statically, which is the default for VC++; #define BOOST_THREAD_DYN_LINK before including any boost headers) should work too, but again, I haven't tried it.

If that doesn't work, try googling for some combination of boost thread clr tls; you should find quite a few posts on the boost mailing list about it, as this is an old problem.

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EDIT: As commented here by Raman Sharma (a senior PM at Microsoft), even std::mutex isn't supported with /clr, so it's no real surprise that boost.thread's mutex implementation isn't either.