/*

 * Copyright (c) 2007, 2010, 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 "incls/_precompiled.incl"

#include "incls/_cmsPermGen.cpp.incl"

CMSPermGen::CMSPermGen(ReservedSpace rs, size_t initial_byte_size,

             CardTableRS* ct,

             FreeBlockDictionary::DictionaryChoice dictionaryChoice) {

  CMSPermGenGen* g =

    new CMSPermGenGen(rs, initial_byte_size, -1, ct);

  if (g == NULL) {

    vm_exit_during_initialization("Could not allocate a CompactingPermGen");

  }

  g->initialize_performance_counters();

  _gen = g;

}

HeapWord* CMSPermGen::mem_allocate(size_t size) {

  Mutex* lock = _gen->freelistLock();

  bool lock_owned = lock->owned_by_self();

  if (lock_owned) {

    MutexUnlocker mul(lock);

    return mem_allocate_in_gen(size, _gen);

  } else {

    return mem_allocate_in_gen(size, _gen);

  }

}

HeapWord* CMSPermGen::request_expand_and_allocate(Generation* gen,

                                                  size_t size,

                                                  GCCause::Cause prev_cause /* ignored */) {

  HeapWord* obj = gen->expand_and_allocate(size, false);

  if (gen->capacity() >= _capacity_expansion_limit) {

    set_capacity_expansion_limit(gen->capacity() + MaxPermHeapExpansion);

    assert(((ConcurrentMarkSweepGeneration*)gen)->should_concurrent_collect(),

           "Should kick off a collection if one not in progress");

  }

  return obj;

}

void CMSPermGen::compute_new_size() {

  _gen->compute_new_size();

}

void CMSPermGenGen::initialize_performance_counters() {

  const char* gen_name = "perm";

  // Generation Counters - generation 2, 1 subspace

  _gen_counters = new GenerationCounters(gen_name, 2, 1, &_virtual_space);

  _gc_counters = NULL;

  _space_counters = new GSpaceCounters(gen_name, 0,

                                       _virtual_space.reserved_size(),

                                       this, _gen_counters);

}