/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  * * * * * * * *
 * 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_MULTITASKING_WAIT_MANAGER_SLEEP
#define EVA_MULTITASKING_WAIT_MANAGER_SLEEP

#include <logger/logger.hpp>
#include <tasking/tasking.hpp>
#include <tasking/wait/waiter.hpp>

/**
 * Waiter implementation used for threads that performs the {s_sleep} system call
 */
class WaiterSleep : public Waiter {
private:
    /**
     * internal data
     */
    Scheduler* timingScheduler; // scheduler that schedule this thread
    uint64_t   timeStart;       // start time
    uint64_t   timeSleep;       // time to sleep

public:
    /**
     * filled constructor
     *
     * @param task:		the task that want to sleep
     * @param ms:		the amount of milliseconds that task want to sleep
     */
    WaiterSleep(Thread* task, uint64_t ms)
        : timingScheduler(task->scheduler), timeStart(timingScheduler->getMilliseconds()),
          timeSleep(ms) {
    }

    /**
     * implementation of check waiting method
     *
     * @param task:		the task that wait
     * @return true if task must keep waiting
     */
    virtual bool checkWaiting(Thread* task) {
        uint64_t diff = timingScheduler->getMilliseconds() - timeStart;

        // keep sleeping
        if ( diff < timeSleep )
            return true;

        // sleeping time finisched
        return false;
    }

    /**
     * @return the name of the waiter
     */
    virtual const char* debugName() {
        return "WaiterSleep";
    }
};

#endif
