/*

 * 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

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 */

#include "gc/shared/suspendibleThreadSet.hpp"

#include "gc/shared/stringdedup/stringDedupQueue.inline.hpp"

#include "gc/shared/stringdedup/stringDedupThread.hpp"

template <typename S>

void StringDedupThreadImpl<S>::do_deduplication() {

  S total_stat;

  deduplicate_shared_strings(&total_stat);

  // Main loop

  for (;;) {

    S stat;

    stat.mark_idle();

    // Wait for the queue to become non-empty

    StringDedupQueue::wait();

    if (this->should_terminate()) {

      break;

    }

    {

      // Include thread in safepoints

      SuspendibleThreadSetJoiner sts_join;

      stat.mark_exec();

      StringDedupStat::print_start(&stat);

      // Process the queue

      for (;;) {

        oop java_string = StringDedupQueue::pop();

        if (java_string == NULL) {

          break;

        }

        StringDedupTable::deduplicate(java_string, &stat);

        // Safepoint this thread if needed

        if (sts_join.should_yield()) {

          stat.mark_block();

          sts_join.yield();

          stat.mark_unblock();

        }

      }

      stat.mark_done();

      total_stat.add(&stat);

      print_end(&stat, &total_stat);

      stat.reset();

    }

    StringDedupTable::clean_entry_cache();

  }

}

template <typename S>

void StringDedupThreadImpl<S>::create() {

  assert(_thread == NULL, "One string deduplication thread allowed");

  _thread = new StringDedupThreadImpl<S>();

}