/*

 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef SHARE_VM_MEMORY_PADDED_INLINE_HPP

#define SHARE_VM_MEMORY_PADDED_INLINE_HPP

#include "memory/allocation.inline.hpp"

#include "memory/padded.hpp"

#include "utilities/debug.hpp"

#include "utilities/globalDefinitions.hpp"

// Creates an aligned padded array.

// The memory can't be deleted since the raw memory chunk is not returned.

template <class T, MEMFLAGS flags, size_t alignment>

PaddedEnd<T>* PaddedArray<T, flags, alignment>::create_unfreeable(uint length) {

  // Check that the PaddedEnd class works as intended.

  STATIC_ASSERT(is_size_aligned_(sizeof(PaddedEnd<T>), alignment));

  // Allocate a chunk of memory large enough to allow for some alignment.

  void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags);

  // Make the initial alignment.

  PaddedEnd<T>* aligned_padded_array = (PaddedEnd<T>*)align_pointer_up(chunk, alignment);

  // Call the default constructor for each element.

  for (uint i = 0; i < length; i++) {

    ::new (&aligned_padded_array[i]) T();

  }

  return aligned_padded_array;

}

template <class T, MEMFLAGS flags, size_t alignment>

T** Padded2DArray<T, flags, alignment>::create_unfreeable(uint rows, uint columns, size_t* allocation_size) {

  // Calculate and align the size of the first dimension's table.

  size_t table_size = align_size_up_(rows * sizeof(T*), alignment);

  // The size of the separate rows.

  size_t row_size = align_size_up_(columns * sizeof(T), alignment);

  // Total size consists of the indirection table plus the rows.

  size_t total_size = table_size + rows * row_size + alignment;

  // Allocate a chunk of memory large enough to allow alignment of the chunk.

  void* chunk = AllocateHeap(total_size, flags);

  // Clear the allocated memory.

  memset(chunk, 0, total_size);

  // Align the chunk of memory.

  T** result = (T**)align_pointer_up(chunk, alignment);

  void* data_start = (void*)((uintptr_t)result + table_size);

  // Fill in the row table.

  for (size_t i = 0; i < rows; i++) {

    result[i] = (T*)((uintptr_t)data_start + i * row_size);

  }

  if (allocation_size != NULL) {

    *allocation_size = total_size;

  }

  return result;

}

template <class T, MEMFLAGS flags, size_t alignment>

T* PaddedPrimitiveArray<T, flags, alignment>::create_unfreeable(size_t length) {

  // Allocate a chunk of memory large enough to allow for some alignment.

  void* chunk = AllocateHeap(length * sizeof(T) + alignment, flags);

  memset(chunk, 0, length * sizeof(T) + alignment);

  return (T*)align_pointer_up(chunk, alignment);

}

#endif // SHARE_VM_MEMORY_PADDED_INLINE_HPP