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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