I played with the current QCDLoop git master (2.0.4 as of 2020.01.07 20:27 UTC), making sure that I have "-DENABLE_FORTRAN_WRAPPER=ON".
While trying the "examples/fortran_test.f", I get a runtime warning saying that the Fortran "wrapper is not thread-safe".
Could you, please, be more specific why?
According to the GNU Fortran Compiler "Thread-safety of the runtime library" docs chapter, there should be no big problems (well, one might want to add "-frecursive" when compiling Fortran code).
At the same time, there appears also another runtime message saying that one should "consider developing object-oriented code", which seems to suggest that the provided C++ wrapper is thread-safe.
However, in this case I would expect that all C / C++ source code files are compiled and linked (i.e. object files, shared libraries and executables) with use of the gcc / g++ "-pthread" flag (at least on Linux). This does not seem to be the case (i.e. you do not use this flag at all).
The https://arxiv.org/pdf/1605.03181.pdf paper says (on page 9):
The native c++ interface of the QCDLoop library is thread-safe only when the caching algorithms are switched off. It is particularly important to highlight that the fortran wrapper is not thread-safe by construction.
Could you, please, be more specific how do you achieve the thread safety of the C++ wrapper (and then why the Fortran wrapper, which is also written in C, is not thread-safe)?
I played with the current QCDLoop git master (2.0.4 as of 2020.01.07 20:27 UTC), making sure that I have "
-DENABLE_FORTRAN_WRAPPER=ON".While trying the "examples/fortran_test.f", I get a runtime warning saying that the Fortran "wrapper is not thread-safe".
Could you, please, be more specific why?
According to the GNU Fortran Compiler "Thread-safety of the runtime library" docs chapter, there should be no big problems (well, one might want to add "
-frecursive" when compiling Fortran code).At the same time, there appears also another runtime message saying that one should "consider developing object-oriented code", which seems to suggest that the provided C++ wrapper is thread-safe.
However, in this case I would expect that all C / C++ source code files are compiled and linked (i.e. object files, shared libraries and executables) with use of the gcc / g++ "
-pthread" flag (at least on Linux). This does not seem to be the case (i.e. you do not use this flag at all).The https://arxiv.org/pdf/1605.03181.pdf paper says (on page 9):
Could you, please, be more specific how do you achieve the thread safety of the C++ wrapper (and then why the Fortran wrapper, which is also written in C, is not thread-safe)?