alloc_type.hpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#ifndef ALLOC_TYPE_HPP
#define ALLOC_TYPE_HPP

template <typename T>
class ReusableBuffer {
private:
  std::vector<T> buffer; 
 
public:
  T *Allocate(size_t count)
  {
    if (this->buffer.size() < count) this->buffer.resize(count);
    return this->buffer.data();
  }

  T *ZeroAllocate(size_t count)
  {
    this->buffer.clear();
    this->buffer.resize(count, {});
    return this->buffer.data();
  }

  inline const T *GetBuffer() const
  {
    return this->buffer.data();
  }
};
 
#endif /* ALLOC_TYPE_HPP */