77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/* @(#) monitor.h 1.1 94/10/31 Copyr 1987 Sun Micro */
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/* Copyright (C) 1987. Sun Microsystems, Inc. */
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/*
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* This source code is a product of Sun Microsystems, Inc. and is provided
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* for unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify this source code without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* THIS PROGRAM CONTAINS SOURCE CODE COPYRIGHTED BY SUN MICROSYSTEMS, INC.
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* AND IS LICENSED TO SUNSOFT, INC., A SUBSIDIARY OF SUN MICROSYSTEMS, INC.
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* SUN MICROSYSTEMS, INC., MAKES NO REPRESENTATIONS ABOUT THE SUITABLITY
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* OF SUCH SOURCE CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT
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* EXPRESS OR IMPLIED WARRANTY OF ANY KIND. SUN MICROSYSTEMS, INC. DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO SUCH SOURCE CODE, INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN
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* NO EVENT SHALL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT,
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* INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM USE OF SUCH SOURCE CODE, REGARDLESS OF THE THEORY OF LIABILITY.
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*
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* This source code is provided with no support and without any obligation on
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* the part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS
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* SOURCE CODE OR ANY PART THEREOF.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#ifndef _lwp_monitor_h
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#define _lwp_monitor_h
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/* definition of a monitor */
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typedef struct monitor_t {
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qheader_t mon_waiting; /* queue of waiting lwps */
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struct lwp_t *mon_owner; /* lwp owning mon (LWPNULL if unowned) */
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struct monitor_t *mon_set; /* prev mon in nested call */
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int mon_nestlevel; /* # of times same lwp reenters mon */
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int mon_lock; /* lock for validity check */
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} monitor_t;
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#define MONNULL ((struct monitor_t *) 0)
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/* for keeping list of all monitors in the system */
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typedef struct monps_t {
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struct monps_t *monps_next; /* next monitor in list */
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monitor_t *monps_monid; /* monitor identity */
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} monps_t;
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#define MONPSNULL ((monps_t *) 0)
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/* set monitor ownership */
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#define MON_SET(p, m) \
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{ \
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m->mon_owner = p; \
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m->mon_set = p->lwp_curmon; \
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p->lwp_curmon = m; \
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m->mon_nestlevel = p->lwp_monlevel; \
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p->lwp_monlevel = 0; \
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}
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/* restore monitor ownership */
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#define MON_RESTORE(p, m) \
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{ \
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p->lwp_curmon = m->mon_set; \
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m->mon_set = MONNULL; \
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m->mon_nestlevel = 0; \
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}
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extern qheader_t __MonitorQ; /* list of all monitors in the system */
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extern void __moncleanup(/* corpse */);
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extern void __init_mon();
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#endif /*!_lwp_monitor_h*/
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