[136] | 1 | // This file is part of Eigen, a lightweight C++ template library
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| 2 | // for linear algebra.
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| 3 | //
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| 4 | // Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
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| 5 | // Copyright (C) 2009 Hauke Heibel <hauke.heibel@googlemail.com>
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| 6 | //
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| 7 | // This Source Code Form is subject to the terms of the Mozilla
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| 8 | // Public License v. 2.0. If a copy of the MPL was not distributed
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| 9 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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| 10 |
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| 11 | #ifndef EIGEN_STL_DETAILS_H
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| 12 | #define EIGEN_STL_DETAILS_H
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| 13 |
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| 14 | #ifndef EIGEN_ALIGNED_ALLOCATOR
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| 15 | #define EIGEN_ALIGNED_ALLOCATOR Eigen::aligned_allocator
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| 16 | #endif
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| 17 |
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| 18 | namespace Eigen {
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| 19 |
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| 20 | // This one is needed to prevent reimplementing the whole std::vector.
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| 21 | template <class T>
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| 22 | class aligned_allocator_indirection : public EIGEN_ALIGNED_ALLOCATOR<T>
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| 23 | {
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| 24 | public:
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| 25 | typedef size_t size_type;
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| 26 | typedef ptrdiff_t difference_type;
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| 27 | typedef T* pointer;
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| 28 | typedef const T* const_pointer;
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| 29 | typedef T& reference;
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| 30 | typedef const T& const_reference;
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| 31 | typedef T value_type;
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| 32 |
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| 33 | template<class U>
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| 34 | struct rebind
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| 35 | {
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| 36 | typedef aligned_allocator_indirection<U> other;
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| 37 | };
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| 38 |
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| 39 | aligned_allocator_indirection() {}
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| 40 | aligned_allocator_indirection(const aligned_allocator_indirection& ) : EIGEN_ALIGNED_ALLOCATOR<T>() {}
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| 41 | aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T>& ) {}
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| 42 | template<class U>
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| 43 | aligned_allocator_indirection(const aligned_allocator_indirection<U>& ) {}
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| 44 | template<class U>
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| 45 | aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U>& ) {}
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| 46 | ~aligned_allocator_indirection() {}
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| 47 | };
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| 48 |
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| 49 | #ifdef _MSC_VER
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| 50 |
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| 51 | // sometimes, MSVC detects, at compile time, that the argument x
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| 52 | // in std::vector::resize(size_t s,T x) won't be aligned and generate an error
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| 53 | // even if this function is never called. Whence this little wrapper.
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| 54 | #define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) \
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| 55 | typename Eigen::internal::conditional< \
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| 56 | Eigen::internal::is_arithmetic<T>::value, \
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| 57 | T, \
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| 58 | Eigen::internal::workaround_msvc_stl_support<T> \
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| 59 | >::type
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| 60 |
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| 61 | namespace internal {
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| 62 | template<typename T> struct workaround_msvc_stl_support : public T
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| 63 | {
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| 64 | inline workaround_msvc_stl_support() : T() {}
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| 65 | inline workaround_msvc_stl_support(const T& other) : T(other) {}
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| 66 | inline operator T& () { return *static_cast<T*>(this); }
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| 67 | inline operator const T& () const { return *static_cast<const T*>(this); }
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| 68 | template<typename OtherT>
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| 69 | inline T& operator=(const OtherT& other)
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| 70 | { T::operator=(other); return *this; }
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| 71 | inline workaround_msvc_stl_support& operator=(const workaround_msvc_stl_support& other)
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| 72 | { T::operator=(other); return *this; }
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| 73 | };
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| 74 | }
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| 75 |
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| 76 | #else
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| 77 |
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| 78 | #define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) T
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| 79 |
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| 80 | #endif
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| 81 |
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| 82 | }
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| 83 |
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| 84 | #endif // EIGEN_STL_DETAILS_H
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