NetBSD/sys/compat/mach/mach_semaphore.h

92 lines
2.8 KiB
C

/* $NetBSD: mach_semaphore.h,v 1.7 2008/04/28 20:23:44 martin Exp $ */
/*-
* Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACH_SEMAPHORE_H_
#define _MACH_SEMAPHORE_H_
#include <sys/rwlock.h>
#include <sys/queue.h>
extern int mach_semaphore_cold;
struct mach_waiting_lwp {
TAILQ_ENTRY(mach_waiting_lwp) mwl_list;
struct lwp *mwl_l;
};
struct mach_semaphore {
int ms_value;
int ms_policy;
LIST_ENTRY(mach_semaphore) ms_list;
TAILQ_HEAD(ms_waiting, mach_waiting_lwp) ms_waiting;
krwlock_t ms_lock;
};
/* semaphore_create */
#define MACH_SYNC_POLICY_FIFO 0
#define MACH_SYNC_POLICY_FIXED_PRIORITY 1
typedef struct {
mach_msg_header_t req_msgh;
mach_ndr_record_t req_ndr;
int req_policy;
int req_value;
} mach_semaphore_create_request_t;
typedef struct {
mach_msg_header_t rep_msgh;
mach_msg_body_t rep_body;
mach_msg_port_descriptor_t rep_sem;
mach_msg_trailer_t rep_trailer;
} mach_semaphore_create_reply_t;
/* semaphore_destroy */
typedef struct {
mach_msg_header_t req_msgh;
mach_msg_body_t req_body;
mach_msg_port_descriptor_t req_sem;
} mach_semaphore_destroy_request_t;
typedef struct {
mach_msg_header_t rep_msgh;
mach_ndr_record_t rep_ndr;
mach_kern_return_t rep_retval;
mach_msg_trailer_t rep_trailer;
} mach_semaphore_destroy_reply_t;
void mach_semaphore_init(void);
void mach_semaphore_cleanup(struct lwp *);
#endif /* _MACH_SEMAPHORE_H_ */