/*

 * Copyright (c) 2011, 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.

 *

 */

#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP

#define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP

#include "gc_implementation/g1/g1AllocRegion.hpp"

inline HeapWord* G1AllocRegion::allocate(HeapRegion* alloc_region,

                                         size_t word_size,

                                         bool bot_updates) {

  assert(alloc_region != NULL, err_msg("pre-condition"));

  if (!bot_updates) {

    return alloc_region->allocate_no_bot_updates(word_size);

  } else {

    return alloc_region->allocate(word_size);

  }

}

inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region,

                                             size_t word_size,

                                             bool bot_updates) {

  assert(alloc_region != NULL, err_msg("pre-condition"));

  assert(!alloc_region->is_empty(), err_msg("pre-condition"));

  if (!bot_updates) {

    return alloc_region->par_allocate_no_bot_updates(word_size);

  } else {

    return alloc_region->par_allocate(word_size);

  }

}

inline HeapWord* G1AllocRegion::attempt_allocation(size_t word_size,

                                                   bool bot_updates) {

  assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));

  HeapRegion* alloc_region = _alloc_region;

  assert(alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));

  HeapWord* result = par_allocate(alloc_region, word_size, bot_updates);

  if (result != NULL) {

    trace("alloc", word_size, result);

    return result;

  }

  trace("alloc failed", word_size);

  return NULL;

}

inline HeapWord* G1AllocRegion::attempt_allocation_locked(size_t word_size,

                                                          bool bot_updates) {

  // First we have to redo the allocation, assuming we're holding the

  // appropriate lock, in case another thread changed the region while

  // we were waiting to get the lock.

  HeapWord* result = attempt_allocation(word_size, bot_updates);

  if (result != NULL) {

    return result;

  }

  retire(true /* fill_up */);

  result = new_alloc_region_and_allocate(word_size, false /* force */);

  if (result != NULL) {

    trace("alloc locked (second attempt)", word_size, result);

    return result;

  }

  trace("alloc locked failed", word_size);

  return NULL;

}

inline HeapWord* G1AllocRegion::attempt_allocation_force(size_t word_size,

                                                         bool bot_updates) {

  assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));

  assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));

  trace("forcing alloc");

  HeapWord* result = new_alloc_region_and_allocate(word_size, true /* force */);

  if (result != NULL) {

    trace("alloc forced", word_size, result);

    return result;

  }

  trace("alloc forced failed", word_size);

  return NULL;

}

#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP