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/*
* Copyright (c) 2000-2005 Apple Computer, 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
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#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_signal_thread (semaphore_t semaphore,
thread_t thread);
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_wait_signal (semaphore_t wait_semaphore,
semaphore_t signal_semaphore);
extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore,
semaphore_t signal_semaphore,
mach_timespec_t wait_time);
__END_DECLS
#ifdef PRIVATE
#define SEMAPHORE_OPTION_NONE 0x00000000
#define SEMAPHORE_SIGNAL 0x00000001
#define SEMAPHORE_WAIT 0x00000002
#define SEMAPHORE_WAIT_ON_SIGNAL 0x00000008
#define SEMAPHORE_SIGNAL_TIMEOUT 0x00000010
#define SEMAPHORE_SIGNAL_ALL 0x00000020
#define SEMAPHORE_SIGNAL_INTERRUPT 0x00000040 /* libmach implements */
#define SEMAPHORE_SIGNAL_PREPOST 0x00000080
#define SEMAPHORE_WAIT_TIMEOUT 0x00000100
#define SEMAPHORE_WAIT_INTERRUPT 0x00000400 /* libmach implements */
#define SEMAPHORE_TIMEOUT_NOBLOCK 0x00100000
#define SEMAPHORE_TIMEOUT_RELATIVE 0x00200000
#define SEMAPHORE_USE_SAVED_RESULT 0x01000000 /* internal use only */
#define SEMAPHORE_SIGNAL_RELEASE 0x02000000 /* internal use only */
#endif /* PRIVATE */
#endif /* _MACH_SEMAPHORE_H_ */