99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/* $NetBSD: mach_semaphore.h,v 1.4 2003/12/30 00:15:46 manu Exp $ */
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/*-
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* Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACH_SEMAPHORE_H_
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#define _MACH_SEMAPHORE_H_
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#include <sys/lock.h>
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#include <sys/queue.h>
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extern int mach_semaphore_cold;
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struct mach_waiting_lwp {
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TAILQ_ENTRY(mach_waiting_lwp) mwl_list;
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struct lwp *mwl_l;
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};
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struct mach_semaphore {
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int ms_value;
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int ms_policy;
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LIST_ENTRY(mach_semaphore) ms_list;
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TAILQ_HEAD(ms_waiting, mach_waiting_lwp) ms_waiting;
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struct lock ms_lock;
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};
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/* semaphore_create */
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#define MACH_SYNC_POLICY_FIFO 0
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#define MACH_SYNC_POLICY_FIXED_PRIORITY 1
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typedef struct {
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mach_msg_header_t req_msgh;
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mach_ndr_record_t req_ndr;
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int req_policy;
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int req_value;
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} mach_semaphore_create_request_t;
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typedef struct {
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mach_msg_header_t rep_msgh;
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mach_msg_body_t rep_body;
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mach_msg_port_descriptor_t rep_sem;
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mach_msg_trailer_t rep_trailer;
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} mach_semaphore_create_reply_t;
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/* semaphore_destroy */
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typedef struct {
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mach_msg_header_t req_msgh;
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mach_msg_body_t req_body;
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mach_msg_port_descriptor_t req_sem;
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} mach_semaphore_destroy_request_t;
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typedef struct {
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mach_msg_header_t rep_msgh;
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mach_ndr_record_t rep_ndr;
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mach_kern_return_t rep_retval;
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mach_msg_trailer_t rep_trailer;
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} mach_semaphore_destroy_reply_t;
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void mach_semaphore_init(void);
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void mach_semaphore_cleanup(struct lwp *);
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#endif /* _MACH_SEMAPHORE_H_ */
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