/*

 * Copyright (c) 2017, 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/g1/g1FullGCScope.hpp"

G1FullGCScope* G1FullGCScope::_instance = NULL;

G1FullGCScope* G1FullGCScope::instance() {

  assert(_instance != NULL, "Must be setup already");

  return _instance;

}

G1FullGCScope::G1FullGCScope(bool explicit_gc, bool clear_soft) :

    _rm(),

    _explicit_gc(explicit_gc),

    _g1h(G1CollectedHeap::heap()),

    _gc_id(),

    _svc_marker(SvcGCMarker::FULL),

    _timer(),

    _tracer(),

    _active(),

    _cpu_time(),

    _soft_refs(clear_soft, _g1h->collector_policy()),

    _memory_stats(true, _g1h->gc_cause()),

    _collector_stats(_g1h->g1mm()->full_collection_counters()),

    _heap_transition(_g1h) {

  assert(_instance == NULL, "Only one scope at a time");

  _timer.register_gc_start();

  _tracer.report_gc_start(_g1h->gc_cause(), _timer.gc_start());

  _g1h->pre_full_gc_dump(&_timer);

  _g1h->trace_heap_before_gc(&_tracer);

  _instance = this;

}

G1FullGCScope::~G1FullGCScope() {

  // We must call G1MonitoringSupport::update_sizes() in the same scoping level

  // as an active TraceMemoryManagerStats object (i.e. before the destructor for the

  // TraceMemoryManagerStats is called) so that the G1 memory pools are updated

  // before any GC notifications are raised.

  _g1h->g1mm()->update_sizes();

  _g1h->trace_heap_after_gc(&_tracer);

  _g1h->post_full_gc_dump(&_timer);

  _timer.register_gc_end();

  _tracer.report_gc_end(_timer.gc_end(), _timer.time_partitions());

  _instance = NULL;

}

bool G1FullGCScope::is_explicit_gc() {

  return _explicit_gc;

}

bool G1FullGCScope::should_clear_soft_refs() {

  return _soft_refs.should_clear();

}

STWGCTimer* G1FullGCScope::timer() {

  return &_timer;

}

SerialOldTracer* G1FullGCScope::tracer() {

  return &_tracer;

}

G1HeapTransition* G1FullGCScope::heap_transition() {

  return &_heap_transition;

}