/*
 * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_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
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 */

#ifndef _MACH_SEMAPHORE_H_
#define _MACH_SEMAPHORE_H_

#include <mach/port.h>
#include <mach/mach_types.h>
#include <mach/kern_return.h>
#include <mach/sync_policy.h>

/*
 *	Forward Declarations
 *
 *	The semaphore creation and deallocation routines are
 *	defined with the Mach task APIs in <mach/task.h>.
 *
 *      kern_return_t	semaphore_create(task_t task,
 *                                       semaphore_t *new_semaphore,
 *					 sync_policy_t policy,
 *					 int value);
 *
 *	kern_return_t	semaphore_destroy(task_t task,
 *					  semaphore_t semaphore);
 */

#include <sys/cdefs.h>
__BEGIN_DECLS

extern  kern_return_t   semaphore_signal(semaphore_t semaphore);
extern  kern_return_t   semaphore_signal_all(semaphore_t semaphore);

extern  kern_return_t   semaphore_wait(semaphore_t semaphore);


extern  kern_return_t   semaphore_timedwait(semaphore_t semaphore,
    mach_timespec_t wait_time);

extern  kern_return_t   semaphore_timedwait_signal(semaphore_t wait_semaphore,
    semaphore_t signal_semaphore,
    mach_timespec_t wait_time);

extern  kern_return_t   semaphore_wait_signal(semaphore_t wait_semaphore,
    semaphore_t signal_semaphore);

extern  kern_return_t   semaphore_signal_thread(semaphore_t semaphore,
    thread_t thread);


__END_DECLS


#endif  /* _MACH_SEMAPHORE_H_ */