// Copyright (C) 2009,2010,2011,2012 GlavSoft LLC.
// All rights reserved.
//
//-------------------------------------------------------------------------
// This file is part of the TightVNC software.  Please visit our Web site:
//
//                       http://www.tightvnc.com/
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//-------------------------------------------------------------------------
//

#include "ThreadCollector.h"

#include "AutoLock.h"

ThreadCollector::ThreadCollector()
{
  resume();
}

ThreadCollector::~ThreadCollector()
{
  if (isActive()) {
    terminate();
    m_timer.notify();
    wait();
  }
  destroyAllThreads();
}

void ThreadCollector::execute()
{
  while (!isTerminating()) {
    deleteDeadThreads();
    m_timer.waitForEvent(50);
  }
}

void ThreadCollector::addThread(Thread *thread)
{
  AutoLock l(&m_lockObj);
  m_threads.push_back(thread);
}

void ThreadCollector::deleteDeadThreads()
{
  AutoLock l(&m_lockObj);

  ThreadList::iterator iter = m_threads.begin();
  while (iter != m_threads.end()) {
    Thread *thread = *iter;
    if (!thread->isActive()) {
      delete thread;
      iter = m_threads.erase(iter);
    } else {
      iter++;
    }
  }
}

void ThreadCollector::destroyAllThreads()
{
  AutoLock l(&m_lockObj);

  ThreadList::iterator iter;
  for (iter = m_threads.begin(); iter != m_threads.end(); iter++) {
    (*iter)->terminate();
  }
  for (iter = m_threads.begin(); iter != m_threads.end(); iter++) {
    (*iter)->wait();
  }

  deleteDeadThreads();
}

const size_t ThreadCollector::Size()
{
  return m_threads.size();
}