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31 lines
1.3 KiB
31 lines
1.3 KiB
#ifndef _IT_IFUNC_H
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#define _IT_IFUNC_H
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//! ifunc helpers
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#if !defined(IFUNC_PREFIX)
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#define IFUNC_PREFIX _ifun__
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#endif
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#if !defined(IFUNC_IMPL_PREFIX)
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#define IFUNC_IMPL_PREFIX _impl__
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#endif
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#define _IFUNC_STR_(X) #X
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#define _IFUNC_STR(X) _IFUNC_STR_(X)
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#define _IFUNC_PREFIX_S _IFUNC_STR(IFUNC_PREFIX)
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#define _IFUNC_PASTE_(X,Y) X##Y
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#define _IFUNC_PASTE(X,Y) _IFUNC_PASTE_(X,Y)
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#define _IFUNC_PREFIX(X) _IFUNC_PASTE(IFUNC_PREFIX, X)
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#define IFUNC_NAME(name, ver) _IFUNC_PASTE(_IFUNC_PASTE(_IFUNC_PASTE(IFUNC_IMPL_PREFIX, name), __), ver)
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#define IFUNC_IMPL(name, ver) __attribute__((copy(name))) IFUNC_NAME(name, ver)
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#define IFUNC_RESOLVER_A(attr, name) __attribute__((returns_nonnull)) (* __attribute__(attr) _IFUNC_PREFIX(name) /*_ifun__ ## name*/ (void)) // When the ifunc resolver wants to return a function pointer that has attributes on it, the attribute inner list (e.g. `(returns_nonnull, const, nonnull)') can be provided as the first argument
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#define IFUNC_RESOLVER(name) IFUNC_RESOLVER_A((copy(name)), name)
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//TODO: Find out if changing visibility of IFUNC resolver is sound. If it is, set to hidden or internal.
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#define IFUNC_DEF(name, params) name params __attribute__((/*__visibility__("internal"),*/ __ifunc__(_IFUNC_PREFIX_S #name)))
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#endif /* _IT_IFUNC_H */
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