/*
 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */

/*
 * devtimer.h 
 * - timer source based on <kern/thread_call.h>
 */


#ifndef _NET_DEVTIMER_H
#define _NET_DEVTIMER_H

#include <sys/types.h>
#include <sys/systm.h>

#define DEVTIMER_USECS_PER_SEC		(1000 * 1000)

enum {
    devtimer_process_func_event_lock,
    devtimer_process_func_event_unlock,
};
typedef int devtimer_process_func_event;

typedef struct devtimer_s * devtimer_ref;
typedef void (*devtimer_process_func)(devtimer_ref timer,
				      devtimer_process_func_event event);
typedef void (*devtimer_timeout_func)(void * arg0, void * arg1, void * arg2);

int
devtimer_valid(devtimer_ref timer);

void
devtimer_retain(devtimer_ref timer);

void *
devtimer_arg0(devtimer_ref timer);

devtimer_ref
devtimer_create(devtimer_process_func process_func, void * arg0);

void
devtimer_invalidate(devtimer_ref timer);

void
devtimer_release(devtimer_ref timer);

void
devtimer_set_absolute(devtimer_ref t,
		      struct timeval abs_time,
		      devtimer_timeout_func func,
		      void * arg1, void * arg2);

void
devtimer_set_relative(devtimer_ref t,
		      struct timeval rel_time,
		      devtimer_timeout_func func,
		      void * arg1, void * arg2);
void
devtimer_cancel(devtimer_ref t);

int
devtimer_enabled(devtimer_ref t);

struct timeval
devtimer_current_time(void);

int32_t
devtimer_current_secs(void);

#endif _NET_DEVTIMER_H
