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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include "lint.h"
     30 #include <synch.h>
     31 #include <time.h>
     32 #include <errno.h>
     33 #include <sys/syscall.h>
     34 
     35 #define	SUBSYS_lwp_rwlock_rdlock	0
     36 #define	SUBSYS_lwp_rwlock_wrlock	1
     37 #define	SUBSYS_lwp_rwlock_tryrdlock	2
     38 #define	SUBSYS_lwp_rwlock_trywrlock	3
     39 #define	SUBSYS_lwp_rwlock_unlock	4
     40 
     41 int
     42 __lwp_rwlock_rdlock(rwlock_t *rwl, timespec_t *tsp)
     43 {
     44 	sysret_t rval;
     45 	int error;
     46 
     47 	error = __systemcall(&rval, SYS_lwp_rwlock_sys,
     48 	    SUBSYS_lwp_rwlock_rdlock, rwl, tsp);
     49 	if (error == ERESTART)
     50 		error = EINTR;
     51 
     52 	return (error);
     53 }
     54 
     55 int
     56 __lwp_rwlock_wrlock(rwlock_t *rwl, timespec_t *tsp)
     57 {
     58 	sysret_t rval;
     59 	int error;
     60 
     61 	error = __systemcall(&rval, SYS_lwp_rwlock_sys,
     62 	    SUBSYS_lwp_rwlock_wrlock, rwl, tsp);
     63 	if (error == ERESTART)
     64 		error = EINTR;
     65 
     66 	return (error);
     67 }
     68 
     69 int
     70 __lwp_rwlock_tryrdlock(rwlock_t *rwl)
     71 {
     72 	sysret_t rval;
     73 	int error;
     74 
     75 	error = __systemcall(&rval, SYS_lwp_rwlock_sys,
     76 	    SUBSYS_lwp_rwlock_tryrdlock, rwl);
     77 	if (error == ERESTART)
     78 		error = EINTR;
     79 
     80 	return (error);
     81 }
     82 
     83 int
     84 __lwp_rwlock_trywrlock(rwlock_t *rwl)
     85 {
     86 	sysret_t rval;
     87 	int error;
     88 
     89 	error = __systemcall(&rval, SYS_lwp_rwlock_sys,
     90 	    SUBSYS_lwp_rwlock_trywrlock, rwl);
     91 	if (error == ERESTART)
     92 		error = EINTR;
     93 
     94 	return (error);
     95 }
     96 
     97 int
     98 __lwp_rwlock_unlock(rwlock_t *rwl)
     99 {
    100 	sysret_t rval;
    101 	int error;
    102 
    103 	error = __systemcall(&rval, SYS_lwp_rwlock_sys,
    104 	    SUBSYS_lwp_rwlock_unlock, rwl);
    105 	if (error == ERESTART)
    106 		error = EINTR;
    107 
    108 	return (error);
    109 }
    110