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[z/OS][libc++] Remove align_val_t dependency in small_buffer.h #114396

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Merged
merged 7 commits into from
Nov 7, 2024
Merged

[z/OS][libc++] Remove align_val_t dependency in small_buffer.h #114396

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a83b5ca
Guard to be used only when they are available
zibi2 Oct 31, 2024
ff95378
Add __libcpp_allocate and __libcpp_deallocate in the absense of align…
zibi2 Oct 31, 2024
f05f144
formattig
zibi2 Oct 31, 2024
315a922
Simplify __alloc() and __dealloc() in __utility/small_buffer.h
zibi2 Nov 4, 2024
af06112
Correct previous simplification in __small_buffer::__alloc()
zibi2 Nov 6, 2024
9733748
Correct previous simplification in __small_buffer::__dealloc()
zibi2 Nov 6, 2024
e00d067
Pass the right size to __libcpp_deallocate()
zibi2 Nov 7, 2024
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4 changes: 4 additions & 0 deletions libcxx/include/__utility/small_buffer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@ class __small_buffer {
return *std::launder(reinterpret_cast<_Stored**>(__buffer_));
}

# ifdef _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION
template <class _Stored>
_LIBCPP_HIDE_FROM_ABI _Stored* __alloc() {
if constexpr (__fits_in_buffer<_Stored>) {
Expand All @@ -72,11 +73,14 @@ class __small_buffer {
}
}

# endif // _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION
# ifdef _LIBCPP_HAS_LIBRARY_SIZED_DEALLOCATION
template <class _Stored>
_LIBCPP_HIDE_FROM_ABI void __dealloc() noexcept {
if constexpr (!__fits_in_buffer<_Stored>)
::operator delete[](*reinterpret_cast<void**>(__buffer_), sizeof(_Stored), align_val_t{alignof(_Stored)});
}
# endif // _LIBCPP_HAS_LIBRARY_SIZED_DEALLOCATION

template <class _Stored, class... _Args>
_LIBCPP_HIDE_FROM_ABI void __construct(_Args&&... __args) {
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