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/********************************************************************************
* *
* W o r k - S t e a l i n g Q u e u e *
* *
*********************************************************************************
* Copyright (C) 2016,2022 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 FXWSQUEUE_H
#define FXWSQUEUE_H
namespace FX {
/// Work-stealing queue
class FXAPI FXWSQueue {
private:
FXPtrList list;
volatile FXint top;
volatile FXint bot;
private:
FXWSQueue(const FXWSQueue&);
FXWSQueue &operator=(const FXWSQueue&);
public:
/// Create a queue and set its size to sz
FXWSQueue(FXint sz=256);
/// Change size of the queue
FXbool setSize(FXint sz);
/// Return size
FXint getSize() const { return list.no(); }
/// Return number of used slots
FXint getUsed() const;
/// Return number of free slots
FXint getFree() const;
/// Check if queue is full
FXbool isFull() const;
/// Check if queue is empty
FXbool isEmpty() const;
/// Push pointer
FXbool push(FXptr ptr);
/// Pop pointer
FXbool pop(FXptr& ptr);
/// Take (steal) pointer
FXbool take(FXptr& ptr);
/// Delete queue
virtual ~FXWSQueue();
};
}
#endif
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