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Fix item vtable usage on Windows

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The item tree is intended to be initialized with pointers to the item
vtables, which are implemented using data relocation records that
resolve to the symbols exported by the sixtyfps_cpp shared library.

On windows, according to

    https://docs.microsoft.com/en-us/cpp/c-language/rules-and-limitations-for-dllimport-dllexport?view=msvc-160

such data relocations are not supported, so this patch implements the
fallback through getter functions.
This commit is contained in:
Simon Hausmann 2021-05-10 16:24:13 +02:00 • committed by Simon Hausmann
parent 4198513832
commit 28701d2f90
5 changed files with 30 additions and 5 deletions
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12
api/sixtyfps-cpp/include/sixtyfps_config.h
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@ -16,3 +16,15 @@ LICENSE END */
#elif UINTPTR_MAX == 0xFFFFFFFFFFFFFFFFu
# define SIXTYFPS_TARGET_64
#endif
#if defined(_MSC_VER)
# define SIXTYFPS_DLL_IMPORT __declspec(dllimport)
#elif defined(__GNUC__)
# if defined(_WIN32) || defined(_WIN64)
# define SIXTYFPS_DLL_IMPORT __declspec(dllimport)
# else
# define SIXTYFPS_DLL_IMPORT __attribute__((visibility("default")))
# endif
#else
# define SIXTYFPS_DLL_IMPORT
#endif