FXTaskGroup.h

/********************************************************************************
*                                                                               *
*                        T a s k   G r o u p   C l a s s                        *
*                                                                               *
*********************************************************************************
* Copyright (C) 2012,2022 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXTASKGROUP_H
#define FXTASKGROUP_H

namespace FX {


class FXThreadPool;


class FXAPI FXTaskGroup {
private:
  class Task : public FXRunnable {
  private:
    FXTaskGroup *taskgroup;     // Backlink to taskgroup
    FXRunnable  *runnable;      // Wrapped runnable
  private:
    Task(const Task&);
    Task &operator=(const Task&);
  public:
    Task(FXTaskGroup* g,FXRunnable *r);
    virtual FXint run();
    virtual ~Task();
    };
private:
  FXThreadPool *threadpool;     // Thread pool used by task group
  FXCompletion  completion;     // Completion counter
private:
  FXTaskGroup(const FXTaskGroup&);
  FXTaskGroup &operator=(const FXTaskGroup&);
public:

  FXTaskGroup();

  FXTaskGroup(FXThreadPool* p);

  FXThreadPool* getThreadPool() const { return threadpool; }

  FXuint getRunningTasks() const { return completion.count(); }

  FXbool execute(FXRunnable* task);

  FXbool executeAndWait(FXRunnable* task);

  FXbool wait();

  virtual ~FXTaskGroup();
  };

}

#endif