/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  * * * * * * * *
 * MeetiX OS By MeetiX OS Project [Marco Cicognani]                                    *
 *                                                                                     *
 *         DERIVED FROM THE GHOST OPERATING SYSTEM                                     *
 *         This software is derived from the Ghost operating system project,           *
 *         written by Max Schl√ºssel <lokoxe@gmail.com>. Copyright 2012-2017            *
 *         https://ghostkernel.org/                                                    *
 *         https://github.com/maxdev1/ghost                                            *
 *                                                                                     *
 * 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 (char *argumentat 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      *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  * * * * * * */

#ifndef EVA_FILESYSTEM_PIPES
#define EVA_FILESYSTEM_PIPES

#include "Api/Kernel.h"
#include "Api/StdInt.h"
#include "filesystem/pipes.hpp"
#include "tasking/process.hpp"
#include "utils/ListEntry.hpp"

/**
 *
 */
typedef int PipeID;

/**
 *
 */
struct Pipe {
    uint8_t* buffer;
    uint8_t* write;
    uint8_t* read;
    uint32_t size;
    uint32_t capacity;

    ListEntry<Pid>* references;
};

/**
 *
 */
class Pipes {
public:
    /**
     *
     */
    static void initialize();

    /**
     *
     */
    static Pipe* get(PipeID id);

    /**
     *
     */
    static PipeID create();

    /**
     *
     */
    static void addReference(PipeID pipe, Pid pid);

    /**
     *
     */
    static void removeReference(PipeID pipe, Pid pid);

    /**
     *
     */
    static bool hasReferenceFromOtherProcess(Pipe* pipe, Pid pid);
};

#endif
