From e2abcdca396661cbe0ae2ddb13d5c2b85682c13a Mon Sep 17 00:00:00 2001 From: Cem Keylan Date: Fri, 16 Oct 2020 17:41:25 +0300 Subject: initial commit --- sys/sys/mplock.h | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 sys/sys/mplock.h (limited to 'sys/sys/mplock.h') diff --git a/sys/sys/mplock.h b/sys/sys/mplock.h new file mode 100644 index 0000000..34f2f97 --- /dev/null +++ b/sys/sys/mplock.h @@ -0,0 +1,75 @@ +/* $OpenBSD: mplock.h,v 1.13 2019/04/23 13:35:12 visa Exp $ */ + +/* + * Copyright (c) 2004 Niklas Hallqvist. 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 THE AUTHOR ``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 AUTHOR 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 _MPLOCK_H_ +#define _MPLOCK_H_ + +#include + +#ifdef __USE_MI_MPLOCK + +#include + +struct __mp_lock_cpu { + u_int mplc_ticket; + u_int mplc_depth; +}; + +struct __mp_lock { + struct __mp_lock_cpu mpl_cpus[MAXCPUS]; + volatile u_int mpl_ticket; + u_int mpl_users; +#ifdef WITNESS + struct lock_object mpl_lock_obj; +#endif +}; + +void ___mp_lock_init(struct __mp_lock *, const struct lock_type *); +void __mp_lock(struct __mp_lock *); +void __mp_unlock(struct __mp_lock *); +int __mp_release_all(struct __mp_lock *); +int __mp_release_all_but_one(struct __mp_lock *); +void __mp_acquire_count(struct __mp_lock *, int); +int __mp_lock_held(struct __mp_lock *, struct cpu_info *); + +#ifdef WITNESS + +#define __mp_lock_init(mpl) do { \ + static const struct lock_type __lock_type = { .lt_name = #mpl };\ + ___mp_lock_init((mpl), &__lock_type); \ +} while (0) + +#else /* WITNESS */ + +#define __mp_lock_init(mpl) ___mp_lock_init((mpl), NULL) + +#endif /* WITNESS */ + +#endif /* __USE_MI_MPLOCK */ + +extern struct __mp_lock kernel_lock; + +#endif /* !_MPLOCK_H */ -- cgit v1.2.3