The commit adds support for move constructors and assignment to random UUID
generators and random providers. Also, in POSIX random provider, the commit
improves handling of return value from ::read(), which returns -1
in case of error and may return 0 in case of success. Retry the call when
it was interrupted before reading any bytes from /dev/urandom.
Added new tests for movability and compile-fail tests for no copyability.
This addresses GitHub issue:
https://github.com/boostorg/uuid/issues/71
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
