6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
122 lines
4.9 KiB
C
122 lines
4.9 KiB
C
/* $NetBSD: simplelock.h,v 1.8 2008/04/28 20:24:11 martin Exp $ */
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/*-
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* Copyright (c) 1999, 2000, 2006, 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ross Harvey.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code contains ideas from software contributed to Berkeley by
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* Avadis Tevanian, Jr., Michael Wayne Young, and the Mach Operating
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* System project at Carnegie-Mellon University.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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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* @(#)lock.h 8.12 (Berkeley) 5/19/95
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*/
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#ifndef _SYS_SIMPLELOCK_H_
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#define _SYS_SIMPLELOCK_H_
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#if defined(_KERNEL_OPT)
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#include "opt_multiprocessor.h"
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#include "opt_lockdebug.h"
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#endif
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#include <machine/types.h>
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#include <machine/lock.h>
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/*
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* The simple lock. Provides a simple spinning mutex. Note the
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* member which is used in atomic operations must be aligned in
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* order for it to work on the widest range of processor types.
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*/
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struct simplelock {
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__cpu_simple_lock_t lock_data;
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#ifdef __CPU_SIMPLE_LOCK_PAD
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/*
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* For binary compatibility where the lock word has been
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* made shorter.
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*/
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uint8_t lock_pad[3];
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#endif
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};
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#define SIMPLELOCK_INITIALIZER { .lock_data = __SIMPLELOCK_UNLOCKED }
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#ifdef _KERNEL
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#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG)
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#define simple_lock_init(alp) __cpu_simple_lock_init(&(alp)->lock_data)
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#define simple_lock(alp) __cpu_simple_lock(&(alp)->lock_data)
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#define simple_lock_held(alp) (__SIMPLELOCK_LOCKED_P(&(alp)->lock_data))
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#define simple_lock_try(alp) __cpu_simple_lock_try(&(alp)->lock_data)
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#define simple_unlock(alp) __cpu_simple_unlock(&(alp)->lock_data)
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#else
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#define simple_lock_nothing(alp) \
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do { \
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(void)alp; \
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} while (0);
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#define simple_lock_init(alp) simple_lock_nothing(alp)
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#define simple_lock(alp) simple_lock_nothing(alp)
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#define simple_lock_held(alp) 1
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#define simple_lock_try(alp) 1
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#define simple_unlock(alp) simple_lock_nothing(alp)
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#endif
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#endif /* _KERNEL */
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#endif /* _SYS_SIMPLELOCK_H_ */
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