+
−/* Shared pool of memory blocks for pool allocators.
+
−   Copyright (C) 2015-2017 Free Software Foundation, Inc.
+
−
+
−This file is part of GCC.
+
−
+
−GCC 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; either version 3, or (at your option) any later
+
−version.
+
−
+
−GCC 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 GCC; see the file COPYING3.  If not see
+
−<http://www.gnu.org/licenses/>.  */
+
−
+
−#include "config.h"
+
−#include "system.h"
+
−#include "coretypes.h"
+
−#include "memory-block.h"
+
−#include "obstack.h"
+
−
+
−/* Global singleton-like instance.  */
+
−memory_block_pool memory_block_pool::instance;
+
−
+
−memory_block_pool::memory_block_pool () : m_blocks (NULL) {}
+
−
+
−/* Return all blocks from free list to the OS.  */
+
−void
+
−memory_block_pool::clear_free_list ()
+
−{
+
−  while (m_blocks)
+
−    {
+
−      block_list *next = m_blocks->m_next;
+
−      XDELETEVEC (m_blocks);
+
−      m_blocks = next;
+
−    }
+
−}
+
−
+
−/* Allocate a chunk for obstack.  Use the pool if requested chunk size matches
+
−   the size of blocks in the pool.  */
+
−void *
+
−mempool_obstack_chunk_alloc (size_t size)
+
−{
+
−  if (size == memory_block_pool::block_size)
+
−    return memory_block_pool::allocate ();
+
−  else
+
−    return XNEWVEC (char, size);
+
−}
+
−
+
−/* Free previously allocated obstack chunk.  */
+
−void
+
−mempool_obstack_chunk_free (void *chunk)
+
−{
+
−  size_t size = (reinterpret_cast<_obstack_chunk *> (chunk)->limit
+
−		 - reinterpret_cast<char *> (chunk));
+
−  if (size == memory_block_pool::block_size)
+
−    memory_block_pool::release (chunk);
+
−  else
+
−    XDELETEVEC (chunk);
+
−}