operating-system provided entropy as it is more secure and
faster for the typical use case of generating one uuid at
a time.
This is a breaking change for anyone passing a mt19937
into one of the explicit constructors of random_generator,
which would be quite rare.
Changed the default random provider on Windows to use BCrypt
where available, falling back to Wincrypt when necessary or
when explicitly requested through a macro.
Provide a new random_generator_mt19937 type definition for
use cases where a large number of uuids need to be created
with high performance. This is equivalent to the previous
definition of random_generator.
Provide a random generation benchmark test showing the
cutoff where the mt19937-based generator will outperform the
standard generator based on wall time.
Removed template specialization for boost::random::random_device
so that any UniformRandomNumberGenerator can be used properly
with random_generator.
Replaced the seed_rng detail implementation (which had a number
of flaws) with a replacement header-only random_provider
implementation.
Note: entropy generation errors will cause an entropy_error
to be thrown from random_generator. The previous implementation
ignored errors and silently failed.
Added internal support for entropy generation on cloudabi
platform leveraging the new random_provider implementation.
Added internal support for Universal Windows Platform (UWP)
development leveraging the new random_provider implementation.
Added internal support for getentropy() on Linux and OpenBSD
if certain requirements are met.
This fixes#24
This closes#53
On Linux, GNU's libstdc++, which is the default stdlib for icc and clang,
cannot parse the <iomanip> header in version 4.5+ (which thankfully neither
compiler advises the use of yet), as it's original C++98-friendly
implementation has been replaced with a gnu++0x implementation.
<boost/detail/iomanip.hpp> is a portable implementation of <iomanip>, providing
boost::detail::setfill, boost::detail::setbase, boost::detail::setw,
boost::detail::setprecision, boost::detail::setiosflags and
boost::detail::resetiosflags.
[SVN r68140]
