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wrapper macros for thread synchronization primitives

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12302 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Love Hörnquist Åstrand
2003-05-16 20:41:46 +00:00
parent 4f3bc07635
commit cec7e2f443
1 changed files with 101 additions and 0 deletions
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lib/krb5/heim_threads.h Normal file
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/*
* Copyright (c) 2003 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
*/
/* $Id$ */
/*
* Provide wrapper macros for thread synchronization primitives so we
* can use native thread functions for those operating system that
* supports it.
*
* This is so libkrb5.so (or more importantly, libgssapi.so) can have
* thread support while the program that that dlopen(3)s the library
* don't need to be linked to libpthread.
*/
#ifndef HEIM_THREADS_H
#define HEIM_THREADS_H 1
/* assume headers already included */
#if defined(__NetBSD__) && __NetBSD_Version__ >= 106120000
/*
* NetBSD have a thread lib that we can use that part of libc that
* works regardless if application are linked to pthreads or not.
*/
#include <threadlib.h>
#define HEIMDAL_MUTEX mutex_t
#define HEIMDAL_MUTEX_INITIALIZER MUTEX_INITIALIZER
#define HEIMDAL_MUTEX_init(m) mutex_init(m)
#define HEIMDAL_MUTEX_lock(m) mutex_lock(m)
#define HEIMDAL_MUTEX_unlock(m) mutex_unlock(m)
#define HEIMDAL_MUTEX_destroy(m) mutex_destroy(m)
/* XXX hole for Jacques to fill in :)
#el if defined(__FreeBSD_version) && */
#elif define(ENABLE_PTHREAD_SUPPORT)
#define HEIMDAL_MUTEX pthread_mutex_t
#define HEIMDAL_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
#define HEIMDAL_MUTEX_init(m) pthread_mutex_init(m)
#define HEIMDAL_MUTEX_lock(m) pthread_mutex_lock(m)
#define HEIMDAL_MUTEX_unlock(m) pthread_mutex_unlock(m)
#define HEIMDAL_MUTEX_destroy(m) pthread_mutex_destroy(m)
#elif defined(HEIMDAL_DEBUG_THREADS) || 1
/* no threads support, just do consistency checks */
#include <stdlib.h>
#define HEIMDAL_MUTEX int
#define HEIMDAL_MUTEX_INITIALIZER 0
#define HEIMDAL_MUTEX_init(m) do { (*(m)) = 0; } while(0)
#define HEIMDAL_MUTEX_lock(m) do { if ((*(m))++ != 0) abort(); } while(0)
#define HEIMDAL_MUTEX_unlock do { if ((*(m))-- != 1) abort(); } while(0)
#define HEIMDAL_MUTEX_destroy do {if ((*(m)) != 0) abort(); } while(0)
#else /* no thread support, no debug case */
#define HEIMDAL_MUTEX int
#define HEIMDAL_MUTEX_INITIALIZER 0
#define HEIMDAL_MUTEX_init(m) do { } while(0)
#define HEIMDAL_MUTEX_lock(m) do { } while(0)
#define HEIMDAL_MUTEX_unlock do { } while(0)
#define HEIMDAL_MUTEX_destroy do { } while(0)
#endif /* no thread support */
#endif /* HEIM_THREADS_H */