c4e20cad00
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
205 lines
6.7 KiB
C
205 lines
6.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008 Attilio Rao <attilio@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_LOCKMGR_H_
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#define _SYS_LOCKMGR_H_
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#include <sys/_lock.h>
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#include <sys/_lockmgr.h>
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#include <sys/_mutex.h>
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#include <sys/_rwlock.h>
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#define LK_SHARE 0x01
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#define LK_SHARED_WAITERS 0x02
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#define LK_EXCLUSIVE_WAITERS 0x04
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#define LK_EXCLUSIVE_SPINNERS 0x08
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#define LK_ALL_WAITERS \
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(LK_SHARED_WAITERS | LK_EXCLUSIVE_WAITERS)
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#define LK_FLAGMASK \
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(LK_SHARE | LK_ALL_WAITERS | LK_EXCLUSIVE_SPINNERS)
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#define LK_HOLDER(x) ((x) & ~LK_FLAGMASK)
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#define LK_SHARERS_SHIFT 4
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#define LK_SHARERS(x) (LK_HOLDER(x) >> LK_SHARERS_SHIFT)
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#define LK_SHARERS_LOCK(x) ((x) << LK_SHARERS_SHIFT | LK_SHARE)
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#define LK_ONE_SHARER (1 << LK_SHARERS_SHIFT)
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#define LK_UNLOCKED LK_SHARERS_LOCK(0)
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#define LK_KERNPROC ((uintptr_t)(-1) & ~LK_FLAGMASK)
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#ifdef _KERNEL
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#if !defined(LOCK_FILE) || !defined(LOCK_LINE)
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#error "LOCK_FILE and LOCK_LINE not defined, include <sys/lock.h> before"
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#endif
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struct thread;
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#define lk_recurse lock_object.lo_data
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/*
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* Function prototipes. Routines that start with an underscore are not part
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* of the public interface and might be wrappered with a macro.
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*/
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int __lockmgr_args(struct lock *lk, u_int flags, struct lock_object *ilk,
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const char *wmesg, int prio, int timo, const char *file, int line);
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int lockmgr_lock_fast_path(struct lock *lk, u_int flags,
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struct lock_object *ilk, const char *file, int line);
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int lockmgr_unlock_fast_path(struct lock *lk, u_int flags,
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struct lock_object *ilk);
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#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT)
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void _lockmgr_assert(const struct lock *lk, int what, const char *file, int line);
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#endif
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void _lockmgr_disown(struct lock *lk, const char *file, int line);
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void lockallowrecurse(struct lock *lk);
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void lockallowshare(struct lock *lk);
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void lockdestroy(struct lock *lk);
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void lockdisablerecurse(struct lock *lk);
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void lockdisableshare(struct lock *lk);
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void lockinit(struct lock *lk, int prio, const char *wmesg, int timo,
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int flags);
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#ifdef DDB
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int lockmgr_chain(struct thread *td, struct thread **ownerp);
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#endif
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void lockmgr_printinfo(const struct lock *lk);
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int lockstatus(const struct lock *lk);
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/*
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* As far as the ilk can be a static NULL pointer these functions need a
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* strict prototype in order to safely use the lock_object member.
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*/
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static __inline int
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_lockmgr_args(struct lock *lk, u_int flags, struct mtx *ilk, const char *wmesg,
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int prio, int timo, const char *file, int line)
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{
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return (__lockmgr_args(lk, flags, (ilk != NULL) ? &ilk->lock_object :
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NULL, wmesg, prio, timo, file, line));
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}
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static __inline int
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_lockmgr_args_rw(struct lock *lk, u_int flags, struct rwlock *ilk,
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const char *wmesg, int prio, int timo, const char *file, int line)
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{
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return (__lockmgr_args(lk, flags, (ilk != NULL) ? &ilk->lock_object :
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NULL, wmesg, prio, timo, file, line));
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}
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/*
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* Define aliases in order to complete lockmgr KPI.
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*/
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#define lockmgr(lk, flags, ilk) \
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_lockmgr_args((lk), (flags), (ilk), LK_WMESG_DEFAULT, \
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LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, LOCK_FILE, LOCK_LINE)
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#define lockmgr_args(lk, flags, ilk, wmesg, prio, timo) \
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_lockmgr_args((lk), (flags), (ilk), (wmesg), (prio), (timo), \
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LOCK_FILE, LOCK_LINE)
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#define lockmgr_args_rw(lk, flags, ilk, wmesg, prio, timo) \
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_lockmgr_args_rw((lk), (flags), (ilk), (wmesg), (prio), (timo), \
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LOCK_FILE, LOCK_LINE)
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#define lockmgr_disown(lk) \
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_lockmgr_disown((lk), LOCK_FILE, LOCK_LINE)
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#define lockmgr_recursed(lk) \
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((lk)->lk_recurse != 0)
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#define lockmgr_rw(lk, flags, ilk) \
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_lockmgr_args_rw((lk), (flags), (ilk), LK_WMESG_DEFAULT, \
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LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, LOCK_FILE, LOCK_LINE)
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#ifdef INVARIANTS
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#define lockmgr_assert(lk, what) \
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_lockmgr_assert((lk), (what), LOCK_FILE, LOCK_LINE)
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#else
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#define lockmgr_assert(lk, what)
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#endif
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/*
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* Flags for lockinit().
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*/
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#define LK_INIT_MASK 0x0000FF
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#define LK_CANRECURSE 0x000001
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#define LK_NODUP 0x000002
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#define LK_NOPROFILE 0x000004
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#define LK_NOSHARE 0x000008
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#define LK_NOWITNESS 0x000010
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#define LK_QUIET 0x000020
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#define LK_ADAPTIVE 0x000040
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#define LK_IS_VNODE 0x000080 /* Tell WITNESS about a VNODE lock */
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/*
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* Additional attributes to be used in lockmgr().
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*/
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#define LK_EATTR_MASK 0x00FF00
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#define LK_INTERLOCK 0x000100
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#define LK_NOWAIT 0x000200
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#define LK_RETRY 0x000400
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#define LK_SLEEPFAIL 0x000800
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#define LK_TIMELOCK 0x001000
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#define LK_NODDLKTREAT 0x002000
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#define LK_VNHELD 0x004000
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/*
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* Operations for lockmgr().
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*/
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#define LK_TYPE_MASK 0xFF0000
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#define LK_DOWNGRADE 0x010000
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#define LK_DRAIN 0x020000
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#define LK_EXCLOTHER 0x040000
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#define LK_EXCLUSIVE 0x080000
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#define LK_RELEASE 0x100000
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#define LK_SHARED 0x200000
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#define LK_UPGRADE 0x400000
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#define LK_TRYUPGRADE 0x800000
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#define LK_TOTAL_MASK (LK_INIT_MASK | LK_EATTR_MASK | LK_TYPE_MASK)
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/*
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* Default values for lockmgr_args().
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*/
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#define LK_WMESG_DEFAULT (NULL)
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#define LK_PRIO_DEFAULT (0)
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#define LK_TIMO_DEFAULT (0)
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/*
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* Assertion flags.
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*/
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#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT)
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#define KA_LOCKED LA_LOCKED
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#define KA_SLOCKED LA_SLOCKED
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#define KA_XLOCKED LA_XLOCKED
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#define KA_UNLOCKED LA_UNLOCKED
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#define KA_RECURSED LA_RECURSED
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#define KA_NOTRECURSED LA_NOTRECURSED
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#endif
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#endif /* _KERNEL */
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#endif /* !_SYS_LOCKMGR_H_ */
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