There were many tests that created code paths for every base and Vec
type that VTK-m supports (up to 4 components). Although this is
admirable, it is also excessive, and our compile times for the tests are
very long.
To shorten compile times, remove the TryAllTypes method. Replace it with
a version of TryTypes that uses a default list of "exemplar" set of
integers, floats, and Vecs.
This allows callers to copy a subsection of an array into another array,
without clearing the contents of the destination array if a resize
is required.
The TryExecute function was based off of the ResolveFieldTypeAnd*
classes made for filters. To reduce the amount of code duplication,
modify these two filter classes to use the more general TryExecute
functionality.
There are various reasons why you might want to execute something but
not have a specific device to execute on. To mange this, add a general
function that will try a list of devices in order and attempt to run on
them in order.
I don't know why, but under some circumstances when compiling with CUDA
and Visual Studio, the compiler was giving syntax errors when the
IteratorFromArrayPortal was using the typename keyword to reference a
type in its superclass. Get around the problem by looking directly in
the superclass.
There are several tests in the cont directory that are in header files so
that they can be recompiled for different devices. Make sure that the
tests are exclusively using the device being tested by making the error
device adapter the default.
If any part of the test tries to use the default device (which could be
different than the one being tested), a compile error will occur. Several
of these compile errors are fixed in this commit.
There were a few places in the source code where
std::numeric_limits::min and max were used. There is an issue with these
methods on windows because the standard libraries there define macros
with the same name. Get around this problem by either places parentheses
so that they do not look like macros or use the vtkm::Infinity methods
instead.
When compiling under VisualStudio we need to first determine if checked
iterators are enabled ( _ITERATOR_DEBUG_LEVEL ). We don't want to use the
NDEBUG key, as we could be inside a project that is in Debug mode with
disabled checked iterators.
Secondly if they are enabled we need to handle the use case of NULL iterators
that get advanced by length zero. This last case is valid, but isn't supported
by the checked iterators so we need to work around it
Template instantiation is useful because when you are creating object files, as
uninstantiated template definitions are not are not added. Fully supporting
explicit instantiation like ITK does will require more code changes, but
this is a very minor step towards that goal.
These asserts are consolidated into the unified Assert.h. Also made some
minor edits to add asserts where appropriate and a little bit of
reconfiguring as found.
Previously we hinted to the compiler that it should vectorized operations
where the input and output are the same array. This obviously caused problems,
and these hints had to be removed.
In the future we need to first check for aliased arrays, and go from there.
Even when running with the serial backend, the compiler might enable SIMD
vectorization when optimizations are turned on. When this occurs, we need
to use properly atomic Add's and CAE's.
Previously each device adapter only had a unique string name. This was
not the best when it came to developing data structures to track the status
of a given device at runtime.
This adds in a unique numeric identifier to each device adapter. This will
allow classes to easily create bitmasks / lookup tables for the validity of
devices.
When writing multiple backend code users of vtkm need to use the
DeviceAdapterTraits classes, so therefore we should move them to vtkm::cont
to signify this.
Array transforms can now be created with an inverse functor, allowing for
casts back into the native array type. As a result, array transforms with
both a functor and inverse functor defined can perform read and write
operations. As an example, ArrayHandleCast now supports this operation. The
original implementation of ArrayHandleCast (i.e. read only) has been renamed
'ArrayHandleCastForInput'.
