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Diffstat (limited to 'src/common/include')
-rw-r--r-- | src/common/include/gudhi/allocator.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/common/include/gudhi/allocator.h b/src/common/include/gudhi/allocator.h new file mode 100644 index 00000000..4ede14e4 --- /dev/null +++ b/src/common/include/gudhi/allocator.h @@ -0,0 +1,55 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): Marc Glisse + * + * Copyright (C) 2015 INRIA Saclay - Ile de France + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef ALLOCATOR_H_ +#define ALLOCATOR_H_ + +#include <memory> +#include <utility> + +namespace Gudhi { + +/** \private + * An allocator that can be used to build an uninitialized vector. + */ +template <class T, class Base = std::allocator<T>> +struct no_init_allocator : Base { + typedef std::allocator_traits<Base> Base_traits; + template <class U> struct rebind { + typedef no_init_allocator<U, typename Base_traits::template rebind_alloc<U>> other; + }; + + // Inherit constructors. + using Base::Base; + + // Do nothing: that's the whole point! + template<class P> + void construct(P*) noexcept {} + + template<class P, class...U> void construct(P*p, U&&...u) { + Base_traits::construct(*(Base*)this, p, std::forward<U>(u)...); + } +}; + +} // namespace Gudhi + +#endif // ALLOCATOR_H_ |