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/*
* Twin - A Tiny Window System
* Copyright © 2004 Keith Packard <keithp@keithp.com>
* All rights reserved.
*
* This Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the Twin Library; see the file COPYING. If not,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "twinint.h"
static twin_queue_t *head;
static twin_order_t
_twin_work_order (twin_queue_t *a, twin_queue_t *b)
{
twin_work_t *aw = (twin_work_t *) a;
twin_work_t *bw = (twin_work_t *) b;
if (aw->priority < bw->priority)
return TWIN_BEFORE;
if (aw->priority > bw->priority)
return TWIN_AFTER;
return TWIN_AT;
}
static void
_twin_queue_work (twin_work_t *work)
{
_twin_queue_insert (&head, _twin_work_order, &work->queue);
}
void
_twin_run_work (void)
{
twin_work_t *work;
twin_work_t *first;
first = (twin_work_t *) _twin_queue_set_order (&head);
for (work = first; work; work = (twin_work_t *) work->queue.order)
if (!(*work->proc) (work->closure))
_twin_queue_delete (&head, &work->queue);
_twin_queue_review_order (&first->queue);
}
twin_work_t *
twin_set_work (twin_work_proc_t work_proc,
int priority,
void *closure)
{
twin_work_t *work = malloc (sizeof (twin_work_t));
if (!work)
return 0;
work->proc = work_proc;
work->priority = priority;
work->closure = closure;
_twin_queue_work (work);
return work;
}
void
twin_clear_work (twin_work_t *work)
{
_twin_queue_delete (&head, &work->queue);
}