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//==========================================================================

//

//      net/timers.c

//

//      Stand-alone networking support for RedBoot

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos 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 or (at your option) any later version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-07-14

// Purpose:      

// Description:  

//              

// This code is part of RedBoot (tm).

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <net/net.h>

static timer_t *tmr_list;

/*

 * Set a timer. Caller is responsible for providing the timer_t struct.

 */

void

__timer_set(timer_t *t, unsigned long delay,

            tmr_handler_t handler, void *user_data)

{

    timer_t *p;

    t->delay = delay;

    t->start = MS_TICKS();

    t->handler = handler;

    t->user_data = user_data;

    for (p = tmr_list; p; p = p->next)

        if (p == t) {

            return;

        }

    t->next = tmr_list;

    tmr_list = t;

}

/*

 * Remove a given timer from timer list.

 */

void

__timer_cancel(timer_t *t)

{

    timer_t *prev, *p;

    for (prev = NULL, p = tmr_list; p; prev = p, p = p->next)

        if (p == t) {

            if (prev)

                prev->next = p->next;

            else

                tmr_list = p->next;

            return;

        }

}

/*

 * Poll timer list for timer expirations.

 */

void

__timer_poll(void)

{

    timer_t *prev, *t;

    prev = NULL;

    t = tmr_list;

    while (t) {

        if ((MS_TICKS() - t->start) >= t->delay) {

            /* remove it before calling handler */

            if (prev)

                prev->next = t->next;

            else

                tmr_list = t->next;

            /* now, call the handler */

            t->handler(t->user_data);

            /*

             * handler may be time consuming, so start

             * from beginning of list.

             */

            prev = NULL;

            t = tmr_list;

        } else {

            prev = t;

            t = t->next;

        }

    }

}