/*
 * Copyright (c) 2025, Your Name.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is an extension to the protothreads library.
 *
 * Author: Your Name <your.email@example.com>
 */

#ifndef __PT_EXT_H__
#define __PT_EXT_H__

#include "pt.h"
#include "limits.h"

#define PT_WAIT_STAT_SUCC    (0 )
#define PT_WAIT_STAT_TIMEOUT (-2)

/**
 * \addtogroup pt
 * @{
 */

/**
 * Increment the system tick counter.
 *
 * This macro increments the global tick counter. It should be called
 * from a system tick interrupt or similar context.
 */

 void pt_ticks_inc(void);

/**
 * Get the current system tick counter.
 *
 * \return The current tick count.
 */
unsigned int pt_ticks_get(void);



/**
 * Delay for a specified number of milliseconds.
 *
 * This macro blocks the protothread for the specified number of
 * milliseconds. The delay is implemented using the global tick counter.
 *
 * \param pt A pointer to the protothread control structure.
 * \param ms The number of milliseconds to delay.
 */
/**
 * Check if timeout has occurred, handling tick counter overflow.
 *
 * \param start The start tick count
 * \param end The end tick count
 * \param timeout The timeout value in ticks
 * \return 1 if timeout occurred, 0 otherwise
 */
int pt_is_timeout(unsigned int start, unsigned int end, unsigned int timeout);

#define PT_DELAY_MS(pt, ms) \
    do { \
        static unsigned int _pt_delay_start=0; \
        _pt_delay_start = pt_ticks_get(); \
        PT_WAIT_UNTIL((pt), pt_is_timeout(_pt_delay_start, pt_ticks_get(), ms)); \
    } while (0)

#define PT_WAIT(pt, c, timeout, result) \
    do { \
        static unsigned int _pt_wait_start = 0;\
        _pt_wait_start = pt_ticks_get(); \
        *result = -1; \
        PT_WAIT_UNTIL((pt), (c) || pt_is_timeout(_pt_wait_start, pt_ticks_get(), timeout)); \
        if (c) { *result = 0; };\
        if (pt_is_timeout(_pt_wait_start, pt_ticks_get(), timeout)) { *result = -2;};\
    }while (0)

/** @} */
/** @} */

#endif /* __PT_EXT_H__ */