sync.h

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/*
 * sync.h
 *
 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
 *
 * Provide synchronization services.
 *
 * Copyright (C) 2005-2006 Texas Instruments, Inc.
 *
 * This package is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef _SYNC_H
#define _SYNC_H

#include <dspbridge/dbdefs.h>
#include <dspbridge/host_os.h>


/* Special timeout value indicating an infinite wait: */
#define SYNC_INFINITE  0xffffffff

struct sync_object{
    struct completion comp;
    struct completion *multi_comp;
};

static inline void sync_init_event(struct sync_object *event)
{
    init_completion(&event->comp);
    event->multi_comp = NULL;
}

static inline void sync_reset_event(struct sync_object *event)
{
    INIT_COMPLETION(event->comp);
    event->multi_comp = NULL;
}

void sync_set_event(struct sync_object *event);

static inline int sync_wait_on_event(struct sync_object *event,
                            unsigned timeout)
{
    int res;

    res = wait_for_completion_interruptible_timeout(&event->comp,
                        msecs_to_jiffies(timeout));
    if (!res)
        res = -ETIME;
    else if (res > 0)
        res = 0;

    return res;
}

int sync_wait_on_multiple_events(struct sync_object **events,
                     unsigned count, unsigned timeout,
                     unsigned *index);

#endif /* _SYNC_H */