9b6b793bd7
to restore ABI compatibility for pre-10.x binaries. It restores _umtx_lock() and _umtx_unlock() syscalls, and UMTX_OP_LOCK/ UMTX_OP_UNLOCK umtx_op(2) operations. UMUTEX_ERROR_CHECK flag is left out for now, I do not think it makes a difference. PR: 218571 Reviewed by: brooks (previous version) Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D31220
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010, David Xu <davidxu@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 unmodified, this list of conditions, and the following
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* 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef _SYS__UMTX_H_
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#define _SYS__UMTX_H_
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#include <sys/_types.h>
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#include <sys/_timespec.h>
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struct umtx {
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volatile unsigned long u_owner; /* Owner of the mutex. */
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};
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struct umutex {
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volatile __lwpid_t m_owner; /* Owner of the mutex */
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__uint32_t m_flags; /* Flags of the mutex */
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__uint32_t m_ceilings[2]; /* Priority protect ceiling */
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__uintptr_t m_rb_lnk; /* Robust linkage */
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#ifndef __LP64__
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__uint32_t m_pad;
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#endif
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__uint32_t m_spare[2];
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};
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struct ucond {
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volatile __uint32_t c_has_waiters; /* Has waiters in kernel */
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__uint32_t c_flags; /* Flags of the condition variable */
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__uint32_t c_clockid; /* Clock id */
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__uint32_t c_spare[1]; /* Spare space */
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};
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struct urwlock {
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volatile __int32_t rw_state;
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__uint32_t rw_flags;
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__uint32_t rw_blocked_readers;
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__uint32_t rw_blocked_writers;
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__uint32_t rw_spare[4];
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};
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struct _usem {
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volatile __uint32_t _has_waiters;
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volatile __uint32_t _count;
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__uint32_t _flags;
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};
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struct _usem2 {
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volatile __uint32_t _count; /* Waiters flag in high bit. */
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__uint32_t _flags;
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};
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struct _umtx_time {
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struct timespec _timeout;
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__uint32_t _flags;
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__uint32_t _clockid;
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};
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#endif /* !_SYS__UMTX_H_ */
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