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make fixed_size matrices conform to std::is_standard_layout

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This commit is contained in:
Charles Schlosser
2024-11-12 23:34:26 +00:00
committed by Rasmus Munk Larsen
parent 283d871a3f
commit 489dbbc651
4 changed files with 603 additions and 297 deletions
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7
Eigen/src/Core/util/Memory.h
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@@ -147,7 +147,7 @@ EIGEN_DEVICE_FUNC inline void* handmade_aligned_malloc(std::size_t size,
check_that_malloc_is_allowed();
EIGEN_USING_STD(malloc)
void* original = malloc(size + alignment);
if (original == 0) return 0;
if (original == nullptr) return nullptr;
uint8_t offset = static_cast<uint8_t>(alignment - (reinterpret_cast<std::size_t>(original) & (alignment - 1)));
void* aligned = static_cast<void*>(static_cast<uint8_t*>(original) + offset);
*(static_cast<uint8_t*>(aligned) - 1) = offset;
@@ -391,7 +391,8 @@ EIGEN_DEVICE_FUNC inline T* move_construct_elements_of_array(T* ptr, T* src, std
template <typename T>
EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE void check_size_for_overflow(std::size_t size) {
if (size > std::size_t(-1) / sizeof(T)) throw_std_bad_alloc();
constexpr std::size_t max_elements = PTRDIFF_MAX / sizeof(T);
if (size > max_elements) throw_std_bad_alloc();
}
/** \internal Allocates \a size objects of type T. The returned pointer is guaranteed to have 16 bytes alignment.
@@ -473,7 +474,7 @@ EIGEN_DEVICE_FUNC inline T* conditional_aligned_realloc_new(T* pts, std::size_t
template <typename T, bool Align>
EIGEN_DEVICE_FUNC inline T* conditional_aligned_new_auto(std::size_t size) {
if (size == 0) return 0; // short-cut. Also fixes Bug 884
if (size == 0) return nullptr; // short-cut. Also fixes Bug 884
check_size_for_overflow<T>(size);
T* result = static_cast<T*>(conditional_aligned_malloc<Align>(sizeof(T) * size));
if (NumTraits<T>::RequireInitialization) {