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76 lines
3 KiB
C
76 lines
3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1997 Berkeley Software Design, Inc. 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, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, 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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* 3. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER 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
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* SUCH DAMAGE.
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*/
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#ifndef _SYS__LOCK_H_
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#define _SYS__LOCK_H_
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struct lock_object {
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const char *lo_name; /* Individual lock name. */
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u_int lo_flags;
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u_int lo_data; /* General class specific data. */
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struct witness *lo_witness; /* Data for witness. */
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};
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#ifdef _KERNEL
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/*
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* If any of WITNESS, INVARIANTS, or KTR_LOCK KTR tracing has been enabled,
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* then turn on LOCK_DEBUG. When this option is on, extra debugging
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* facilities such as tracking the file and line number of lock operations
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* are enabled. Also, mutex locking operations are not inlined to avoid
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* bloat from all the extra debugging code. We also have to turn on all the
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* calling conventions for this debugging code in modules so that modules can
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* work with both debug and non-debug kernels.
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*/
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#if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(WITNESS) || defined(INVARIANTS) || \
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defined(LOCK_PROFILING) || defined(KTR)
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#define LOCK_DEBUG 1
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#else
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#define LOCK_DEBUG 0
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#endif
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/*
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* In the LOCK_DEBUG case, use the filename and line numbers for debugging
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* operations. Otherwise, use default values to avoid the unneeded bloat.
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*/
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#if LOCK_DEBUG > 0
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#define LOCK_FILE_LINE_ARG_DEF , const char *file, int line
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#define LOCK_FILE_LINE_ARG , file, line
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#define LOCK_FILE __FILE__
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#define LOCK_LINE __LINE__
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#else
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#define LOCK_FILE_LINE_ARG_DEF
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#define LOCK_FILE_LINE_ARG
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#define LOCK_FILE NULL
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#define LOCK_LINE 0
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#endif
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#endif /* _KERNEL */
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#endif /* !_SYS__LOCK_H_ */
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