map_vector_grow_p.hpp

/*
 * Packer_cls.hpp
 *
 *  Created on: Jul 15, 2015
 *      Author: i-bird
 */
 
#ifndef MAP_VECTOR_GROW_POLICY_HPP_
#define MAP_VECTOR_GROW_POLICY_HPP_
 
#define PAGE_ALLOC 1
 
namespace openfpm
{
 
    class grow_policy_identity
    {
    public:
 
        static size_t grow(size_t original, size_t requested)
        {
            return requested;
        }
    };
 
    class grow_policy_double
    {
    public:
 
        static size_t grow(size_t original, size_t requested)
        {
            size_t grow = (original == 0)?1:original;
            while (grow < requested)    {grow *= 2;}
            return grow;
        }
    };
 
    typedef grow_policy_double vector_grow_policy_default;
 
    class grow_policy_page
    {
    public:
 
        static size_t grow(size_t original, size_t requested)
        {
            return (requested / PAGE_ALLOC) * PAGE_ALLOC + PAGE_ALLOC;
        }
    };
}
 
#endif /* MAP_VECTOR_GROW_POLICY_HPP_ */