/*

 * Copyright (c) 2019, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "precompiled.hpp"

#include "gc/z/zArray.inline.hpp"

#include "gc/z/zNMethodAllocator.hpp"

#include "memory/allocation.hpp"

ZArray<void*> ZNMethodAllocator::_deferred_frees;

bool          ZNMethodAllocator::_defer_frees(false);

void ZNMethodAllocator::immediate_free(void* data) {

  FREE_C_HEAP_ARRAY(uint8_t, data);

}

void ZNMethodAllocator::deferred_free(void* data) {

  _deferred_frees.add(data);

}

void* ZNMethodAllocator::allocate(size_t size) {

  return NEW_C_HEAP_ARRAY(uint8_t, size, mtGC);

}

void ZNMethodAllocator::free(void* data) {

  if (data == NULL) {

    return;

  }

  if (_defer_frees) {

    deferred_free(data);

  } else {

    immediate_free(data);

  }

}

void ZNMethodAllocator::activate_deferred_frees() {

  assert(_deferred_frees.is_empty(), "precondition");

  _defer_frees = true;

}

void ZNMethodAllocator::deactivate_and_process_deferred_frees() {

  _defer_frees = false;

  ZArrayIterator<void*> iter(&_deferred_frees);

  for (void* data; iter.next(&data);) {

    immediate_free(data);

  }

  _deferred_frees.clear();

}