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Obey __cpp_sized_deallocation and __cpp_aligned_new

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Don't assume that just because the language version is C++17 that the
standard library offers all C++17 features, too.  When using clang-6.0
and --std=c++17 on Ubuntu 18.04 with libstdc++, __cpp_sized_deallocation
is false.
This commit is contained in:
Jeremy Nimmer 2019-06-14 12:12:51 -04:00 committed by Wenzel Jakob
parent 6c29cbf88d
commit 759221f5c5
2 changed files with 16 additions and 9 deletions
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4
include/pybind11/cast.h
View File

@ -574,10 +574,10 @@ public:
if (type->operator_new) {
vptr = type->operator_new(type->type_size);
} else {
#if defined(PYBIND11_CPP17)
#ifdef __cpp_aligned_new
if (type->type_align > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
vptr = ::operator new(type->type_size,
(std::align_val_t) type->type_align);
std::align_val_t(type->type_align));
else
#endif
vptr = ::operator new(type->type_size);

21
include/pybind11/pybind11.h
View File

@ -1003,14 +1003,21 @@ void call_operator_delete(T *p, size_t s, size_t) { T::operator delete(p, s); }
inline void call_operator_delete(void *p, size_t s, size_t a) {
(void)s; (void)a;
#if defined(PYBIND11_CPP17)
if (a > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
::operator delete(p, s, std::align_val_t(a));
else
#ifdef __cpp_aligned_new
if (a > __STDCPP_DEFAULT_NEW_ALIGNMENT__) {
#ifdef __cpp_sized_deallocation
::operator delete(p, s, std::align_val_t(a));
#else
::operator delete(p, std::align_val_t(a));
#endif
return;
}
#endif
#ifdef __cpp_sized_deallocation
::operator delete(p, s);
#else
::operator delete(p);
#endif
#else
::operator delete(p);
#endif
}
NAMESPACE_END(detail)