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124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#include "main.h"
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struct Good1
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{
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MatrixXd m; // good: m will allocate its own array, taking care of alignment.
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Good1() : m(20,20) {}
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};
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struct Good2
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{
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Matrix3d m; // good: m's size isn't a multiple of 16 bytes, so m doesn't have to be aligned
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};
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struct Good3
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{
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Vector2f m; // good: same reason
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};
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struct Bad4
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{
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Vector2d m; // bad: sizeof(m)%16==0 so alignment is required
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};
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struct Bad5
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{
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Matrix<float, 2, 6> m; // bad: same reason
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};
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struct Bad6
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{
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Matrix<double, 3, 4> m; // bad: same reason
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};
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struct Good7
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{
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EIGEN_MAKE_ALIGNED_OPERATOR_NEW
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Vector2d m;
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float f; // make the struct have sizeof%16!=0 to make it a little more tricky when we allow an array of 2 such objects
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};
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struct Good8
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{
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EIGEN_MAKE_ALIGNED_OPERATOR_NEW
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float f; // try the f at first -- the EIGEN_ALIGN_128 attribute of m should make that still work
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Matrix4f m;
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};
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struct Good9
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{
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Matrix<float,2,2,DontAlign> m; // good: no alignment requested
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float f;
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};
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template<bool Align> struct Depends
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{
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EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF(Align)
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Vector2d m;
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float f;
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};
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template<typename T>
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void check_unalignedassert_good()
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{
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T *x, *y;
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x = new T;
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delete x;
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y = new T[2];
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delete[] y;
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}
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template<typename T>
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void check_unalignedassert_bad()
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{
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float buf[sizeof(T)+16];
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float *unaligned = buf;
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while((reinterpret_cast<size_t>(unaligned)&0xf)==0) ++unaligned; // make sure unaligned is really unaligned
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T *x = ::new(static_cast<void*>(unaligned)) T;
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x->~T();
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}
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void unalignedassert()
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{
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check_unalignedassert_good<Good1>();
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check_unalignedassert_good<Good2>();
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check_unalignedassert_good<Good3>();
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VERIFY_RAISES_ASSERT(check_unalignedassert_bad<Bad4>());
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VERIFY_RAISES_ASSERT(check_unalignedassert_bad<Bad5>());
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VERIFY_RAISES_ASSERT(check_unalignedassert_bad<Bad6>());
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check_unalignedassert_good<Good7>();
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check_unalignedassert_good<Good8>();
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check_unalignedassert_good<Good9>();
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check_unalignedassert_good<Depends<true> >();
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VERIFY_RAISES_ASSERT(check_unalignedassert_bad<Depends<false> >());
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}
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void test_unalignedassert()
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{
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CALL_SUBTEST(unalignedassert());
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}
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