freebsd-dev/lib/libc/rpc/mt_misc.h
John Baldwin 6f88d2a870 Use thr_once() with once_t controls to initialize various thread_key_t
objects used to provide per-thread storage in the RPC code.  Almost all
of these used double-checking with a dedicated mutex (tsd_lock) to do this
before.  However, that is not always safe with more relaxed memory orders.
There were also other bugs, such as one in __rpc_createrr() that caused a
new key to be allocated each time __rpc_createrr() was invoked.

PR:		threads/144558
Reported by:	Sam Robb  samrobb of averesystems com (key leak)
MFC after:	1 week
2010-03-10 13:23:25 +00:00

66 lines
2.6 KiB
C

/*
* Copyright (C) 2006 The FreeBSD Project. All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _MT_MISC_H
#define _MT_MISC_H
/* Take these locks out of the application namespace. */
#define svc_lock __svc_lock
#define svc_fd_lock __svc_fd_lock
#define rpcbaddr_cache_lock __rpcbaddr_cache_lock
#define authdes_ops_lock __authdes_ops_lock
#define authnone_lock __authnone_lock
#define authsvc_lock __authsvc_lock
#define clnt_fd_lock __clnt_fd_lock
#define clntraw_lock __clntraw_lock
#define dupreq_lock __dupreq_lock
#define loopnconf_lock __loopnconf_lock
#define ops_lock __ops_lock
#define proglst_lock __proglst_lock
#define rpcsoc_lock __rpcsoc_lock
#define svcraw_lock __svcraw_lock
#define xprtlist_lock __xprtlist_lock
extern pthread_rwlock_t svc_lock;
extern pthread_rwlock_t svc_fd_lock;
extern pthread_rwlock_t rpcbaddr_cache_lock;
extern pthread_mutex_t authdes_ops_lock;
extern pthread_mutex_t svcauthdesstats_lock;
extern pthread_mutex_t authnone_lock;
extern pthread_mutex_t authsvc_lock;
extern pthread_mutex_t clnt_fd_lock;
extern pthread_mutex_t clntraw_lock;
extern pthread_mutex_t dupreq_lock;
extern pthread_mutex_t loopnconf_lock;
extern pthread_mutex_t ops_lock;
extern pthread_mutex_t proglst_lock;
extern pthread_mutex_t rpcsoc_lock;
extern pthread_mutex_t svcraw_lock;
extern pthread_mutex_t tsd_lock;
extern pthread_mutex_t xprtlist_lock;
#endif