mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
131 lines
4.8 KiB
C
131 lines
4.8 KiB
C
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_internal__ExportMacros_h
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#define vtk_m_internal__ExportMacros_h
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#include <vtkm/internal/Configure.h>
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/*!
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* Export macros for various parts of the VTKm library.
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*/
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#ifdef VTKM_HIP
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#include "hip/hip_runtime.h"
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#define VTKM_EXEC __device__ __host__
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#define VTKM_EXEC_CONT __device__ __host__
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#define VTKM_SUPPRESS_EXEC_WARNINGS
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#elif defined(VTKM_CUDA)
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#define VTKM_EXEC __device__ __host__
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#define VTKM_EXEC_CONT __device__ __host__
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#ifdef VTKM_MSVC
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#if __CUDAVER__ >= 75000
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#define VTKM_SUPPRESS_EXEC_WARNINGS __pragma(nv_exec_check_disable)
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#else
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#define VTKM_SUPPRESS_EXEC_WARNINGS __pragma(hd_warning_disable)
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#endif
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#else
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#if __CUDAVER__ >= 75000
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#define VTKM_SUPPRESS_EXEC_WARNINGS _Pragma("nv_exec_check_disable")
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#else
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#define VTKM_SUPPRESS_EXEC_WARNINGS _Pragma("hd_warning_disable")
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#endif
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#endif
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#else // !VTKM_CUDA
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#define VTKM_EXEC
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#define VTKM_EXEC_CONT
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#define VTKM_SUPPRESS_EXEC_WARNINGS
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#endif // !VTKM_CUDA
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#define VTKM_CONT
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// Background:
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// VTK-m libraries are built with the hidden symbol visibility by default.
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// This means that all template classes that are defined in VTK-m headers are
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// defined with hidden visibility when we are building VTK-m. But when those
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// headers are included by a third-party which has differing visibility controls
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// causing link time warnings ( external vs private ).
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//
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// Issue:
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// Dynamic cast is not just based on the name of the class, but also the
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// combined visibility of the class on OSX. When building the hash_code of
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// an object the symbol visibility controls of the type are taken into
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// consideration ( including symbol vis of template parameters ).
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// Therefore if a class has a component with private/hidden vis than it
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// can't be passed across library boundaries.
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//
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// Example is PolymorphicArrayHandleContainer<T,S> whose visibility affected
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// by the visibility of both T and S.
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//
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// Solution:
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// The solution is fairly simple, but annoying. You need to mark every single
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// header only class that is tempgit lated on non value types to be marked as
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// always exported ( or never pass fvisibility=hidden ).
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//
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// TL;DR:
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// This markup is used when we want to make sure:
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// - The class can be compiled into multiple libraries and at runtime will
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// resolve to a single type instance
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// - Be a type ( or component of a types signature ) that can be passed between
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// dynamic libraries and requires RTTI support ( dynamic_cast ).
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#if defined(VTKM_MSVC) || defined(VTKM_CUDA)
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#define VTKM_ALWAYS_EXPORT
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#define VTKM_NEVER_EXPORT
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#else
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#define VTKM_ALWAYS_EXPORT __attribute__((visibility("default")))
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#define VTKM_NEVER_EXPORT __attribute__((visibility("hidden")))
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#endif
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// cuda 7.5 doesn't support static const or static constexpr variables
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// that exist inside methods or classes, so in those cases we have to use
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// just constexpr
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#if defined(VTKM_CUDA_VERSION_MAJOR) && (VTKM_CUDA_VERSION_MAJOR < 8)
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#define VTKM_STATIC_CONSTEXPR_ARRAY constexpr
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// cuda 8-9 doesn't support static constexpr pointers/fixed size arrays
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// that exist inside methods or classes, so in those cases we gracefully
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// fall back to static const
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#elif defined(VTKM_CUDA_VERSION_MAJOR) && (VTKM_CUDA_VERSION_MAJOR < 10)
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#define VTKM_STATIC_CONSTEXPR_ARRAY static const
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#else
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#define VTKM_STATIC_CONSTEXPR_ARRAY static constexpr
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#endif
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// Clang will warn about weak vtables (-Wweak-vtables) on exception classes,
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// but there's no good way to eliminate them in this case because MSVC (See
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// http://stackoverflow.com/questions/24511376). These macros will silence the
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// warning for classes defined within them.
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#ifdef VTKM_CLANG
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#define VTKM_SILENCE_WEAK_VTABLE_WARNING_START \
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_Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wweak-vtables\"")
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#define VTKM_SILENCE_WEAK_VTABLE_WARNING_END _Pragma("clang diagnostic pop")
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#else // VTKM_CLANG
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#define VTKM_SILENCE_WEAK_VTABLE_WARNING_START
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#define VTKM_SILENCE_WEAK_VTABLE_WARNING_END
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#endif // VTKM_CLANG
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/// Simple macro to identify a parameter as unused. This allows you to name a
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/// parameter that is not used. There are several instances where you might
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/// want to do this. For example, when using a parameter to overload or
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/// template a function but do not actually use the parameter. Another example
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/// is providing a specialization that does not need that parameter.
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#define vtkmNotUsed(parameter_name)
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#endif //vtk_m_internal__ExportMacros_h
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