/*
 * Copyright (c) 2020, 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 "logging/logAsyncFlusher.hpp"
#include "logging/logHandle.hpp"
#include "logging/logMessageBuffer.hpp"

LogAsyncFlusher::~LogAsyncFlusher() {
  disenroll();
  flush();
}

void LogAsyncFlusher::task() {
  LinkedListImpl<AsyncLogMessage, ResourceObj::C_HEAP, mtLogging> logs;
  {
    MutexLocker ml(&_lock, Mutex::_no_safepoint_check_flag);
    _fifo.pop_all(&logs);
  }

  LinkedListIterator<AsyncLogMessage> it(logs.head());
  while (!it.is_empty()) {
    AsyncLogMessage* e = it.next();
    LogTagSet* tagset = e->tagset();
    LogMessageBuffer* buf = e->buffer();
    Arena* arena;
    if (buf != NULL) {
      tagset->log(*buf);
      arena = buf->arena();
      delete buf;
      delete arena;
    }
  }
}

void LogAsyncFlusher::enqueue(LogTagSet* tagset, LogMessageBuffer* buf) {
  MutexLocker ml(&_lock, Mutex::_no_safepoint_check_flag);
  _fifo.push(AsyncLogMessage::create(tagset, buf));
}

LogAsyncFlusher* LogAsyncFlusher::_instance = NULL;

void LogAsyncFlusher::initialize() {
  if (!_instance) {
    _instance = new (mtLogging)LogAsyncFlusher(LogAsyncInterval);
  }
}

void LogAsyncFlusher::cleanup() {
  if (_instance != NULL) {
    delete _instance;
    _instance = NULL;
  }
}

LogAsyncFlusher* LogAsyncFlusher::instance() {
  return _instance;
}