/*

 * Copyright (c) 2002, 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.

 *

 */

#ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP

#define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP

#include "memory/allocation.hpp"

//

// This class exposes implementation details of the various

// collector(s), and we need to be very careful with it. If

// use of this class grows, we should split it into public

// and implemenation-private "causes".

//

class GCCause : public AllStatic {

 public:

  enum Cause {

    /* public */

    _java_lang_system_gc,

    _full_gc_alot,

    _scavenge_alot,

    _allocation_profiler,

    _jvmti_force_gc,

    _gc_locker,

    _heap_inspection,

    _heap_dump,

    /* implementation independent, but reserved for GC use */

    _no_gc,

    _no_cause_specified,

    _allocation_failure,

    /* implementation specific */

    _tenured_generation_full,

    _permanent_generation_full,

    _cms_generation_full,

    _cms_initial_mark,

    _cms_final_remark,

    _old_generation_expanded_on_last_scavenge,

    _old_generation_too_full_to_scavenge,

    _adaptive_size_policy,

    _g1_inc_collection_pause,

    _last_ditch_collection,

    _last_gc_cause

  };

  inline static bool is_user_requested_gc(GCCause::Cause cause) {

    return (cause == GCCause::_java_lang_system_gc ||

            cause == GCCause::_jvmti_force_gc);

  }

  inline static bool is_serviceability_requested_gc(GCCause::Cause

                                                             cause) {

    return (cause == GCCause::_jvmti_force_gc ||

            cause == GCCause::_heap_inspection ||

            cause == GCCause::_heap_dump);

  }

  // Return a string describing the GCCause.

  static const char* to_string(GCCause::Cause cause);

  // Return true if the GCCause is for a full collection.

  static bool is_for_full_collection(GCCause::Cause cause) PRODUCT_RETURN0;

};

#endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP