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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 6:23 pm

1. #include <thread> not on VS2010Can I use boost thread for for the time being?2. for(auto& thread : threads){auto is cute; VS2010 I need to use the type of 'thread' .. is that boost::thread?I would expect change of namespace boost::thread to std::thread.3. Do you have a special case of main(); just 1 thread for starters?
Last edited by Cuchulainn on December 11th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 7:33 pm

>c:\daniel\software\prng\prng_engine.hpp(342): warning C4521: 'sitmo:rng_engine' : multiple copy constructors specified1>c:\daniel\software\prng\prng_engine.hpp(167): warning C4244: 'return' : conversion from 'uint64_t' to 'uint32_t', possible loss of data1>c:\daniel\software\prng\prng_engine.hpp(174): warning C4244: 'return' : conversion from 'uint64_t' to 'uint32_t', possible loss of data1>c:\daniel\software\prng\prng_engine.hpp(188): warning C4244: '+=' : conversion from 'uint64_t' to 'short', possible loss of data1> PRNG.vcxproj -> C:\VSProjects\PRNG\Debug\PRNG.exe // OUTPUT 128 000 000 rns SUM = 2093428117
Last edited by Cuchulainn on December 11th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 7:38 pm

Maybe put a std::thread into a boost::thread_group?
Last edited by Cuchulainn on December 11th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 7:58 pm

Next for me is 2 and 31. Download your native C++ code (easy as Boost yes?) DONE2. Create a Managed C++ wrapper class with a minimal interface to 13. Call 2 from MC in C#
Last edited by Cuchulainn on December 11th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 8:20 pm

QuoteOriginally posted by: outrunThis is great!!I'll get back to all issues, here is the first>c:\daniel\software\prng\prng_engine.hpp(342): warning C4521: 'sitmo:rng_engine' : multiple copy constructors specifiedI initially has a single copy constructorexplicit prng_engine(const prng_engine& x)but I also need to have a constructor that accepts a seed_sequence argument, and that seed_sequence could be any typetemplate<class Seq> explicit prng_engine(Seq& q)the problem was that for some reason the copy constructor was called with a non-const argument, so it didn't match with, and hence instantiated the template constructor.I decided to explicitly add a non-const copy constructor to prevent this,.. but now you get a warning. Maybe I need to study this cause a bit more.Maye ctors witha) const &b) pointer *??
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 12th, 2013, 8:22 pm

QuoteOriginally posted by: outrunArgh! On 32bit machines the global long like "total_sum" are 32 bit, on my machine they are 64 bit, and I thought a long was *always* 64 bit.The solution is to change the type of total_samples and total_sum with these types below (these types are the new C++11 types, and I also define them in the prng_engine.hpp for old compilers)uint64_t total_samples;uint64_t total_sum;Maybe use a <T> and numeric_limits to infer how many bits? (?) It's a compiler/h/w thing?
Last edited by Cuchulainn on December 11th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 13th, 2013, 3:44 am

QuoteOriginally posted by: outrun.. I've managed to get it working on Visual C++ 2008 (version 9), the trick was to replace long with uint64_t.I have also uploaded a new version of the prnd_engine.hpp (v 4), that fixes the type conversion warnings. .. the only issue left (for now ) is the constructor warning.The version below should work on your machine and give 274892645070220693 as output.yep, same output on VS2010>c:\daniel\software\prng\prng_enginev4.hpp(365): warning C4521: 'sitmo:rng_engine' : multiple copy constructors specified
Last edited by Cuchulainn on December 12th, 2013, 11:00 pm, edited 1 time in total.
 
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Cuchulainn
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User feedback Mr. sitmo's prng

December 13th, 2013, 8:31 am

The warning is OK for the moment. But I am not surprised that the compiler complains about the stripped down copy ctor. I would try to find a more elegant solution. Maybe you have somewhere else a function that is not const but should be const? Or just imagine modifying the input argument as you simultaneously create the new object!It's almost like prng_engine(prng_engine x).Remark: both ctors have the same body.
Last edited by Cuchulainn on December 12th, 2013, 11:00 pm, edited 1 time in total.
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