1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 #include "precompiled.hpp"
  25 #include "logging/logAsyncFlusher.hpp"
  26 #include "logging/logHandle.hpp"
  27 #include "logging/logMessageBuffer.hpp"
  28 
  29 LogAsyncFlusher::~LogAsyncFlusher() {
  30   disenroll();
  31   flush();
  32 }
  33 
  34 void LogAsyncFlusher::task() {
  35   LinkedListImpl<AsyncLogMessage, ResourceObj::C_HEAP, mtLogging> logs;
  36   {
  37     MutexLocker ml(&_lock, Mutex::_no_safepoint_check_flag);
  38     _fifo.pop_all(&logs);
  39   }
  40 
  41   LinkedListIterator<AsyncLogMessage> it(logs.head());
  42   while (!it.is_empty()) {
  43     AsyncLogMessage* e = it.next();
  44     LogTagSet* tagset = e->tagset();
  45     LogMessageBuffer* buf = e->buffer();
  46     Arena* arena;
  47     if (buf != NULL) {
  48       tagset->log(*buf);
  49       arena = buf->arena();
  50       delete buf;
  51       delete arena;
  52     }
  53   }
  54 }
  55 
  56 void LogAsyncFlusher::enqueue(LogTagSet* tagset, LogMessageBuffer* buf) {
  57   MutexLocker ml(&_lock, Mutex::_no_safepoint_check_flag);
  58   _fifo.push(AsyncLogMessage::create(tagset, buf));
  59 }
  60 
  61 LogAsyncFlusher* LogAsyncFlusher::_instance = NULL;
  62 
  63 void LogAsyncFlusher::initialize() {
  64   if (!_instance) {
  65     _instance = new (mtLogging)LogAsyncFlusher(LogAsyncInterval);
  66   }
  67 }
  68 
  69 void LogAsyncFlusher::cleanup() {
  70   if (_instance != NULL) {
  71     delete _instance;
  72     _instance = NULL;
  73   }
  74 }
  75 
  76 LogAsyncFlusher* LogAsyncFlusher::instance() {
  77   return _instance;
  78 }