197 lines
5.6 KiB
C
197 lines
5.6 KiB
C
/*-
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* Copyright (c) 2002, Jeffrey Roberson <jeff@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/_umtx.h>
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/* Common lock flags */
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#define USYNC_PROCESS_SHARED 0x0001 /* Process shared sync objs */
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/* umutex flags */
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#define UMUTEX_PRIO_INHERIT 0x0004 /* Priority inherited mutex */
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#define UMUTEX_PRIO_PROTECT 0x0008 /* Priority protect mutex */
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#define UMUTEX_ROBUST 0x0010 /* Robust mutex */
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#define UMUTEX_NONCONSISTENT 0x0020 /* Robust locked but not consistent */
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/*
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* The umutex.m_lock values and bits. The m_owner is the word which
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* serves as the lock. Its high bit is the contention indicator and
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* rest of bits records the owner TID. TIDs values start with PID_MAX
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* + 2 and end by INT32_MAX. The low range [1..PID_MAX] is guaranteed
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* to be useable as the special markers.
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*/
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#define UMUTEX_UNOWNED 0x0
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#define UMUTEX_CONTESTED 0x80000000U
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#define UMUTEX_RB_OWNERDEAD (UMUTEX_CONTESTED | 0x10)
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#define UMUTEX_RB_NOTRECOV (UMUTEX_CONTESTED | 0x11)
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/* urwlock flags */
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#define URWLOCK_PREFER_READER 0x0002
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#define URWLOCK_WRITE_OWNER 0x80000000U
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#define URWLOCK_WRITE_WAITERS 0x40000000U
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#define URWLOCK_READ_WAITERS 0x20000000U
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#define URWLOCK_MAX_READERS 0x1fffffffU
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#define URWLOCK_READER_COUNT(c) ((c) & URWLOCK_MAX_READERS)
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/* _usem flags */
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#define SEM_NAMED 0x0002
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/* _usem2 count field */
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#define USEM_HAS_WAITERS 0x80000000U
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#define USEM_MAX_COUNT 0x7fffffffU
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#define USEM_COUNT(c) ((c) & USEM_MAX_COUNT)
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/* op code for _umtx_op */
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#define UMTX_OP_RESERVED0 0
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#define UMTX_OP_RESERVED1 1
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#define UMTX_OP_WAIT 2
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#define UMTX_OP_WAKE 3
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#define UMTX_OP_MUTEX_TRYLOCK 4
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#define UMTX_OP_MUTEX_LOCK 5
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#define UMTX_OP_MUTEX_UNLOCK 6
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#define UMTX_OP_SET_CEILING 7
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#define UMTX_OP_CV_WAIT 8
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#define UMTX_OP_CV_SIGNAL 9
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#define UMTX_OP_CV_BROADCAST 10
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#define UMTX_OP_WAIT_UINT 11
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#define UMTX_OP_RW_RDLOCK 12
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#define UMTX_OP_RW_WRLOCK 13
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#define UMTX_OP_RW_UNLOCK 14
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#define UMTX_OP_WAIT_UINT_PRIVATE 15
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#define UMTX_OP_WAKE_PRIVATE 16
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#define UMTX_OP_MUTEX_WAIT 17
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#define UMTX_OP_MUTEX_WAKE 18 /* deprecated */
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#define UMTX_OP_SEM_WAIT 19 /* deprecated */
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#define UMTX_OP_SEM_WAKE 20 /* deprecated */
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#define UMTX_OP_NWAKE_PRIVATE 21
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#define UMTX_OP_MUTEX_WAKE2 22
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#define UMTX_OP_SEM2_WAIT 23
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#define UMTX_OP_SEM2_WAKE 24
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#define UMTX_OP_SHM 25
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#define UMTX_OP_ROBUST_LISTS 26
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/* Flags for UMTX_OP_CV_WAIT */
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#define CVWAIT_CHECK_UNPARKING 0x01
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#define CVWAIT_ABSTIME 0x02
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#define CVWAIT_CLOCKID 0x04
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#define UMTX_ABSTIME 0x01
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#define UMTX_CHECK_UNPARKING CVWAIT_CHECK_UNPARKING
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/* Flags for UMTX_OP_SHM */
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#define UMTX_SHM_CREAT 0x0001
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#define UMTX_SHM_LOOKUP 0x0002
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#define UMTX_SHM_DESTROY 0x0004
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#define UMTX_SHM_ALIVE 0x0008
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struct umtx_robust_lists_params {
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uintptr_t robust_list_offset;
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uintptr_t robust_priv_list_offset;
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uintptr_t robust_inact_offset;
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};
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#ifndef _KERNEL
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int _umtx_op(void *obj, int op, u_long val, void *uaddr, void *uaddr2);
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#else
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/*
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* The umtx_key structure is used by both the Linux futex code and the
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* umtx implementation to map userland addresses to unique keys.
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*/
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enum {
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TYPE_SIMPLE_WAIT,
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TYPE_CV,
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TYPE_SEM,
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TYPE_SIMPLE_LOCK,
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TYPE_NORMAL_UMUTEX,
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TYPE_PI_UMUTEX,
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TYPE_PP_UMUTEX,
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TYPE_RWLOCK,
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TYPE_FUTEX,
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TYPE_SHM,
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TYPE_PI_ROBUST_UMUTEX,
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TYPE_PP_ROBUST_UMUTEX,
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};
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/* Key to represent a unique userland synchronous object */
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struct umtx_key {
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int hash;
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int type;
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int shared;
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union {
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struct {
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struct vm_object *object;
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uintptr_t offset;
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} shared;
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struct {
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struct vmspace *vs;
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uintptr_t addr;
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} private;
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struct {
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void *a;
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uintptr_t b;
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} both;
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} info;
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};
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#define THREAD_SHARE 0
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#define PROCESS_SHARE 1
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#define AUTO_SHARE 2
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struct thread;
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static inline int
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umtx_key_match(const struct umtx_key *k1, const struct umtx_key *k2)
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{
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return (k1->type == k2->type &&
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k1->info.both.a == k2->info.both.a &&
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k1->info.both.b == k2->info.both.b);
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}
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int umtx_copyin_timeout(const void *, struct timespec *);
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int umtx_key_get(const void *, int, int, struct umtx_key *);
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void umtx_key_release(struct umtx_key *);
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struct umtx_q *umtxq_alloc(void);
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void umtxq_free(struct umtx_q *);
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int kern_umtx_wake(struct thread *, void *, int, int);
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void umtx_pi_adjust(struct thread *, u_char);
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void umtx_thread_init(struct thread *);
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void umtx_thread_fini(struct thread *);
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void umtx_thread_alloc(struct thread *);
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void umtx_thread_exit(struct thread *);
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#endif /* !_KERNEL */
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#endif /* !_SYS_UMTX_H_ */
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