69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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//
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// SPDX-License-Identifier: BSD-3-Clause
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// Copyright Contributors to the OpenEXR Project.
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//
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#ifndef INCLUDED_IMATHEXPORT_H
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#define INCLUDED_IMATHEXPORT_H
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#include "ImathConfig.h"
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/// \defgroup ExportMacros Macros to manage symbol visibility
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///
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/// There is more information about the motivation for these macros
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/// documented in the OpenEXR source tree
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/// (https://github.com/AcademySoftwareFoundation/openexr) under
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/// docs/SymbolVisibility.md
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///
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/// Imath only needs a couple of the possible macros outlined in the
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/// above document, and due to it largely being inline only, does not
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/// have much to do.
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///
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/// @{
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#if defined(IMATH_DLL)
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// when building Imath as a DLL for Windows, we have to control the
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// typical DLL export / import things. Luckily, the typeinfo is all
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// automatic there, so only have to deal with symbols, except Windows
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// has some weirdness with DLLs and extern const, so we have to
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// provide a macro to handle that.
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# if defined(IMATH_EXPORTS)
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# define IMATH_EXPORT __declspec(dllexport)
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# define IMATH_EXPORT_CONST extern __declspec(dllexport)
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# else
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# define IMATH_EXPORT __declspec(dllimport)
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# define IMATH_EXPORT_CONST extern __declspec(dllimport)
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# endif
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// DLLs don't support these types of visibility controls, just leave them as empty
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# define IMATH_EXPORT_TYPE
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# define IMATH_EXPORT_ENUM
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# define IMATH_EXPORT_TEMPLATE_TYPE
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#else
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# ifdef IMATH_PUBLIC_SYMBOL_ATTRIBUTE
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# define IMATH_EXPORT IMATH_PUBLIC_SYMBOL_ATTRIBUTE
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# define IMATH_EXPORT_CONST extern const IMATH_PUBLIC_SYMBOL_ATTRIBUTE
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# else
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# define IMATH_EXPORT
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# define IMATH_EXPORT_CONST extern const
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# endif
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# ifdef IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE
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# define IMATH_EXPORT_ENUM IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE
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# define IMATH_EXPORT_TEMPLATE_TYPE IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE
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# define IMATH_EXPORT_TYPE IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE
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# else
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# define IMATH_EXPORT_ENUM
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# define IMATH_EXPORT_TEMPLATE_TYPE IMATH_EXPORT
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# define IMATH_EXPORT_TYPE IMATH_EXPORT
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# endif
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#endif // IMATH_DLL
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/// @}
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#endif // INCLUDED_IMATHEXPORT_H
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