ojph_mem.cpp

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//***************************************************************************/
// This software is released under the 2-Clause BSD license, included
// below.
//
// Copyright (c) 2019, Aous Naman
// Copyright (c) 2019, Kakadu Software Pty Ltd, Australia
// Copyright (c) 2019, The University of New South Wales, Australia
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. 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.
//
// 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
// HOLDER 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.
//***************************************************************************/
// This file is part of the OpenJPH software implementation.
// File: ojph_mem.cpp
// Author: Aous Naman
// Date: 28 August 2019
//***************************************************************************/
 
 
#include <new>
#include "ojph_mem.h"
 
namespace ojph {

  //
  //
  //
  //
  //

  template<>
  void line_buf::wrap(si32 *buffer, size_t num_ele, ui32 pre_size)
  {
    this->i32 = buffer;
    this->size = num_ele;
    this->pre_size = pre_size;
    this->flags = LFT_32BIT | LFT_INTEGER;
  }

  template<>
  void line_buf::wrap(float *buffer, size_t num_ele, ui32 pre_size)
  {
    this->f32 = buffer;
    this->size = num_ele;
    this->pre_size = pre_size;
    this->flags = LFT_32BIT;
  }

  template<>
  void line_buf::wrap(si64 *buffer, size_t num_ele, ui32 pre_size)
  {
    this->i64 = buffer;
    this->size = num_ele;
    this->pre_size = pre_size;
    this->flags = LFT_64BIT | LFT_INTEGER;
  }

  //
  //
  //
  //
  //

  mem_elastic_allocator::stores_list*
  mem_elastic_allocator::allocate(mem_elastic_allocator::stores_list** list,
                                  ui32 extended_bytes)
  {
    ui32 bytes = ojph_max(extended_bytes, chunk_size);
    if (avail != NULL && avail->orig_size >= bytes)
    {
      *list = avail;
      avail = avail->next_store;
      (*list)->restart();
      return *list;
    }
    else
    {
      ui32 store_bytes = stores_list::eval_store_bytes(bytes);
      *list = (stores_list*) malloc(store_bytes);
      total_allocated += store_bytes;
      return new (*list) stores_list(bytes);
    }
  }

  void mem_elastic_allocator::get_buffer(ui32 needed_bytes, coded_lists* &p)
  {
    ui32 extended_bytes = needed_bytes + (ui32)sizeof(coded_lists);
 
    if (store == NULL)
      cur_store = store = allocate(&store, extended_bytes);
    else if (cur_store->available < extended_bytes)
      cur_store = allocate(&cur_store->next_store, extended_bytes);
 
    p = new (cur_store->data) coded_lists(needed_bytes);
 
    assert(cur_store->available >= extended_bytes);
    cur_store->available -= extended_bytes;
    cur_store->data += extended_bytes;
  }

  void mem_elastic_allocator::restart()
  {
    // move to the end of avail
    stores_list** p = &avail;
    while (*p != NULL)
      p = &((*p)->next_store);
    *p = store;
    cur_store = store = NULL;
  }
 
}