mirror of
https://github.com/triqs/dft_tools
synced 2024-11-01 11:43:47 +01:00
fc2a620eae
- improve the mem_block and shared_block. - the reference counting is now done in the mem_block and shared_block, removing the need of shared_ptr. - speed tests shows that shared_ptr is very slow (due to thread safety?) the new version is much better, though not perfect. - Hence introducing weak views. - also : -- clean the guard mechanism for python (to allow returning from python without any python ref left). -- clean code, add documentation for mem_block -- remove nan init, which was not working, and corresponding test -- serialisation of view still unchanged (need to forbid serialization of view ??). - tests ok, incl. valgrind tests.
46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
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/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS 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 General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_LINALG_CROSS_PRODUCT_H
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#define TRIQS_LINALG_CROSS_PRODUCT_H
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#include <triqs/utility/exceptions.hpp>
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namespace triqs { namespace arrays {
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/** Cross product. Dim 3 only */
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template<typename VectorType>
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typename VectorType::view_type cross_product (VectorType const & A, VectorType const & B) {
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if (A.shape()[0] !=3) TRIQS_RUNTIME_ERROR<<"arrays::linalg::cross_product : works only in d=3 while you gave a vector of size "<<A.shape()[0];
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if (B.shape()[0] !=3) TRIQS_RUNTIME_ERROR<<"arrays::linalg::cross_product : works only in d=3 while you gave a vector of size "<<B.shape()[0];
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vector<typename boost::remove_const<typename VectorType::value_type >::type > r(3);
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r(0) = A(1)* B(2) - B(1) * A(2);
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r(1) = - A(0)* B(2) + B(0) * A(2);
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r(2) = A(0)*B(1) - B(0) * A(1);
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std::cout << "in cross product "<< A << B << r << std::endl;
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return r;
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}
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}}//namespace triqs::arrays
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#endif
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