| 1 | // |
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| 2 | // SPDX-License-Identifier: BSD-3-Clause |
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| 3 | // Copyright Contributors to the OpenEXR Project. |
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| 4 | // |
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| 5 | |
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| 6 | #ifndef INCLUDED_IMATHEXPORT_H |
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| 7 | #define INCLUDED_IMATHEXPORT_H |
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| 8 | |
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| 9 | #include "ImathConfig.h" |
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| 10 | |
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| 11 | /// \defgroup ExportMacros Macros to manage symbol visibility |
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| 12 | /// |
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| 13 | /// There is more information about the motivation for these macros |
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| 14 | /// documented in the OpenEXR source tree |
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| 15 | /// (https://github.com/AcademySoftwareFoundation/openexr) under |
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| 16 | /// docs/SymbolVisibility.md |
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| 17 | /// |
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| 18 | /// Imath only needs a couple of the possible macros outlined in the |
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| 19 | /// above document, and due to it largely being inline only, does not |
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| 20 | /// have much to do. |
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| 21 | /// |
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| 22 | /// @{ |
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| 23 | #if defined(IMATH_DLL) |
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| 24 | |
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| 25 | // when building Imath as a DLL for Windows, we have to control the |
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| 26 | // typical DLL export / import things. Luckily, the typeinfo is all |
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| 27 | // automatic there, so only have to deal with symbols, except Windows |
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| 28 | // has some weirdness with DLLs and extern const, so we have to |
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| 29 | // provide a macro to handle that. |
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| 30 | |
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| 31 | # if defined(IMATH_EXPORTS) |
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| 32 | # define IMATH_EXPORT __declspec(dllexport) |
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| 33 | # define IMATH_EXPORT_CONST extern __declspec(dllexport) |
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| 34 | # else |
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| 35 | # define IMATH_EXPORT __declspec(dllimport) |
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| 36 | # define IMATH_EXPORT_CONST extern __declspec(dllimport) |
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| 37 | # endif |
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| 38 | |
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| 39 | // DLLs don't support these types of visibility controls, just leave them as empty |
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| 40 | # define IMATH_EXPORT_TYPE |
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| 41 | # define IMATH_EXPORT_ENUM |
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| 42 | # define IMATH_EXPORT_TEMPLATE_TYPE |
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| 43 | |
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| 44 | #else |
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| 45 | |
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| 46 | # ifdef IMATH_PUBLIC_SYMBOL_ATTRIBUTE |
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| 47 | # define IMATH_EXPORT IMATH_PUBLIC_SYMBOL_ATTRIBUTE |
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| 48 | # define IMATH_EXPORT_CONST extern const IMATH_PUBLIC_SYMBOL_ATTRIBUTE |
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| 49 | # else |
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| 50 | # define IMATH_EXPORT |
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| 51 | # define IMATH_EXPORT_CONST extern const |
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| 52 | # endif |
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| 53 | |
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| 54 | # ifdef IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE |
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| 55 | # define IMATH_EXPORT_ENUM IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE |
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| 56 | # define IMATH_EXPORT_TEMPLATE_TYPE IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE |
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| 57 | # define IMATH_EXPORT_TYPE IMATH_PUBLIC_TYPE_VISIBILITY_ATTRIBUTE |
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| 58 | # else |
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| 59 | # define IMATH_EXPORT_ENUM |
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| 60 | # define IMATH_EXPORT_TEMPLATE_TYPE IMATH_EXPORT |
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| 61 | # define IMATH_EXPORT_TYPE IMATH_EXPORT |
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| 62 | # endif |
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| 63 | |
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| 64 | #endif // IMATH_DLL |
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| 65 | |
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| 66 | /// @} |
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| 67 | |
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| 68 | #endif // INCLUDED_IMATHEXPORT_H |
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| 69 | |
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