diff options
Diffstat (limited to 'Eigen/src')
-rwxr-xr-x | Eigen/src/Core/util/Meta.h | 10 | ||||
-rw-r--r-- | Eigen/src/SparseCore/SparseRef.h | 14 |
2 files changed, 17 insertions, 7 deletions
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h index fe9550d71..2153f2c0d 100755 --- a/Eigen/src/Core/util/Meta.h +++ b/Eigen/src/Core/util/Meta.h @@ -612,6 +612,16 @@ template<typename T, typename U> struct scalar_product_traits // typedef typename scalar_product_traits<typename remove_all<ArgType0>::type, typename remove_all<ArgType1>::type>::ReturnType type; // }; +/** \internal Obtains a POD type suitable to use as storage for an object of a size + * of at most Len bytes, aligned as specified by \c Align. + */ +template<unsigned Len, unsigned Align> +struct aligned_storage { + struct type { + EIGEN_ALIGN_TO_BOUNDARY(Align) unsigned char data[Len]; + }; +}; + } // end namespace internal namespace numext { diff --git a/Eigen/src/SparseCore/SparseRef.h b/Eigen/src/SparseCore/SparseRef.h index d91f38f97..748f87d62 100644 --- a/Eigen/src/SparseCore/SparseRef.h +++ b/Eigen/src/SparseCore/SparseRef.h @@ -201,7 +201,7 @@ class Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType ~Ref() { if(m_hasCopy) { - TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(m_object_bytes); + TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(&m_storage); obj->~TPlainObjectType(); } } @@ -213,7 +213,7 @@ class Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType { if((Options & int(StandardCompressedFormat)) && (!expr.isCompressed())) { - TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(m_object_bytes); + TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(&m_storage); ::new (obj) TPlainObjectType(expr); m_hasCopy = true; Base::construct(*obj); @@ -227,14 +227,14 @@ class Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType template<typename Expression> void construct(const Expression& expr, internal::false_type) { - TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(m_object_bytes); + TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(&m_storage); ::new (obj) TPlainObjectType(expr); m_hasCopy = true; Base::construct(*obj); } protected: - char m_object_bytes[sizeof(TPlainObjectType)]; + typename internal::aligned_storage<sizeof(TPlainObjectType), EIGEN_ALIGNOF(TPlainObjectType)>::type m_storage; bool m_hasCopy; }; @@ -319,7 +319,7 @@ class Ref<const SparseVector<MatScalar,MatOptions,MatIndex>, Options, StrideType ~Ref() { if(m_hasCopy) { - TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(m_object_bytes); + TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(&m_storage); obj->~TPlainObjectType(); } } @@ -335,14 +335,14 @@ class Ref<const SparseVector<MatScalar,MatOptions,MatIndex>, Options, StrideType template<typename Expression> void construct(const Expression& expr, internal::false_type) { - TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(m_object_bytes); + TPlainObjectType* obj = reinterpret_cast<TPlainObjectType*>(&m_storage); ::new (obj) TPlainObjectType(expr); m_hasCopy = true; Base::construct(*obj); } protected: - char m_object_bytes[sizeof(TPlainObjectType)]; + typename internal::aligned_storage<sizeof(TPlainObjectType), EIGEN_ALIGNOF(TPlainObjectType)>::type m_storage; bool m_hasCopy; }; |