local_memory.h

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/*
 * Lift
 *
 * Copyright (c) 2014-2015, NVIDIA CORPORATION
 * Copyright (c) 2015, Nuno Subtil <subtil@gmail.com>
 * Copyright (c) 2015, Roche Molecular Systems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * Neither the name of the copyright holders nor the names of its
 *      contributors may be used to endorse or promote products derived from
 *      this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

namespace lift {

#include "../types.h"
#include "../backends.h"
#include "../decorators.h"

// a statically-sized local memory vector
template <typename T, uint32 max_storage_size>
struct local_memory
{
    typedef T        value_type;
    typedef T&       reference;
    typedef const T& const_reference;
    typedef T*       pointer;
    typedef const T* const_pointer;
    typedef uint32   index_type;
    typedef uint32   size_type;

    value_type storage[max_storage_size];
    size_type storage_size = max_storage_size;

    LIFT_HOST_DEVICE local_memory() = default;

    LIFT_HOST_DEVICE void resize(size_type count)
    {
        storage_size = count;
    }

    LIFT_HOST_DEVICE size_type size(void) const
    {
        return storage_size;
    }

    LIFT_HOST_DEVICE pointer data(void)
    {
        return storage;
    }

    LIFT_HOST_DEVICE const_pointer data(void) const
    {
        return storage;
    }

    LIFT_HOST_DEVICE reference operator[] (const size_type index)
    {
        return storage[index];
    }

    LIFT_HOST_DEVICE const_reference operator[] (const size_type index) const
    {
        return storage[index];
    }
};

} // namespace lift