/*

 * Copyright (c) 2011, 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/shared/hSpaceCounters.hpp"

#include "memory/allocation.inline.hpp"

#include "memory/resourceArea.hpp"

#include "runtime/perfData.hpp"

HSpaceCounters::HSpaceCounters(const char* name_space,

                               const char* name,

                               int ordinal,

                               size_t max_size,

                               size_t initial_capacity) {

  if (UsePerfData) {

    EXCEPTION_MARK;

    ResourceMark rm;

    const char* cns =

      PerfDataManager::name_space(name_space, "space", ordinal);

    _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtGC);

    strcpy(_name_space, cns);

    const char* cname = PerfDataManager::counter_name(_name_space, "name");

    PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "maxCapacity");

    PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,

                                     (jlong)max_size, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "capacity");

    _capacity = PerfDataManager::create_variable(SUN_GC, cname,

                                                 PerfData::U_Bytes,

                                                 initial_capacity, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "used");

    _used = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,

                                             (jlong) 0, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "initCapacity");

    PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,

                                     initial_capacity, CHECK);

  }

}

HSpaceCounters::~HSpaceCounters() {

  FREE_C_HEAP_ARRAY(char, _name_space);

}

void HSpaceCounters::update_capacity(size_t v) {

  _capacity->set_value(v);

}

void HSpaceCounters::update_used(size_t v) {

  _used->set_value(v);

}

void HSpaceCounters::update_all(size_t capacity, size_t used) {

  update_capacity(capacity);

  update_used(used);

}

debug_only(

  // for security reasons, we do not allow arbitrary reads from

  // the counters as they may live in shared memory.

  jlong HSpaceCounters::used() {

    return _used->get_value();

  }

  jlong HSpaceCounters::capacity() {

    return _used->get_value();

  }

)