author | William Roberts <williamr@symbian.org> |
Tue, 16 Mar 2010 16:12:26 +0000 | |
branch | Symbian2 |
changeset 2 | 2fe1408b6811 |
parent 0 | 061f57f2323e |
child 4 | 837f303aceeb |
permissions | -rw-r--r-- |
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/*- |
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* Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@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, 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 AUTHOR 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 AUTHOR 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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* © Portions copyright (c) 2007 Symbian Software Ltd. All rights reserved. |
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* $FreeBSD: src/sys/sys/event.h,v 1.32 2005/07/01 16:28:32 ssouhlal Exp $ |
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*/ |
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#ifndef _SYS_EVENT_H_ |
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#define _SYS_EVENT_H_ |
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#define EVFILT_READ (-1) |
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#define EVFILT_WRITE (-2) |
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#define EVFILT_AIO (-3) /* attached to aio requests */ |
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#define EVFILT_VNODE (-4) /* attached to vnodes */ |
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#define EVFILT_PROC (-5) /* attached to struct proc */ |
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#define EVFILT_SIGNAL (-6) /* attached to struct proc */ |
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#define EVFILT_TIMER (-7) /* timers */ |
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#define EVFILT_NETDEV (-8) /* network devices */ |
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#define EVFILT_FS (-9) /* filesystem events */ |
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#define EVFILT_SYSCOUNT 9 |
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#define EV_SET(kevp_, a, b, c, d, e, f) do { \ |
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struct kevent *kevp = (kevp_); \ |
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(kevp)->ident = (a); \ |
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(kevp)->filter = (b); \ |
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(kevp)->flags = (c); \ |
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(kevp)->fflags = (d); \ |
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(kevp)->data = (e); \ |
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(kevp)->udata = (f); \ |
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} while(0) |
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struct kevent { |
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uintptr_t ident; /* identifier for this event */ |
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short filter; /* filter for event */ |
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u_short flags; |
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u_int fflags; |
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intptr_t data; |
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void *udata; /* opaque user data identifier */ |
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}; |
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/* actions */ |
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#define EV_ADD 0x0001 /* add event to kq (implies enable) */ |
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#define EV_DELETE 0x0002 /* delete event from kq */ |
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#define EV_ENABLE 0x0004 /* enable event */ |
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#define EV_DISABLE 0x0008 /* disable event (not reported) */ |
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/* flags */ |
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#define EV_ONESHOT 0x0010 /* only report one occurrence */ |
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#define EV_CLEAR 0x0020 /* clear event state after reporting */ |
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#define EV_SYSFLAGS 0xF000 /* reserved by system */ |
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#define EV_FLAG1 0x2000 /* filter-specific flag */ |
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/* returned values */ |
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#define EV_EOF 0x8000 /* EOF detected */ |
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#define EV_ERROR 0x4000 /* error, data contains errno */ |
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/* |
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* data/hint flags for EVFILT_{READ|WRITE}, shared with userspace |
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*/ |
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#define NOTE_LOWAT 0x0001 /* low water mark */ |
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/* |
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* data/hint flags for EVFILT_VNODE, shared with userspace |
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*/ |
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#define NOTE_DELETE 0x0001 /* vnode was removed */ |
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#define NOTE_WRITE 0x0002 /* data contents changed */ |
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#define NOTE_EXTEND 0x0004 /* size increased */ |
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#define NOTE_ATTRIB 0x0008 /* attributes changed */ |
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#define NOTE_LINK 0x0010 /* link count changed */ |
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#define NOTE_RENAME 0x0020 /* vnode was renamed */ |
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#define NOTE_REVOKE 0x0040 /* vnode access was revoked */ |
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/* |
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* data/hint flags for EVFILT_PROC, shared with userspace |
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*/ |
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#define NOTE_EXIT 0x80000000 /* process exited */ |
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#define NOTE_FORK 0x40000000 /* process forked */ |
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#define NOTE_EXEC 0x20000000 /* process exec'd */ |
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#define NOTE_PCTRLMASK 0xf0000000 /* mask for hint bits */ |
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#define NOTE_PDATAMASK 0x000fffff /* mask for pid */ |
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/* additional flags for EVFILT_PROC */ |
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#define NOTE_TRACK 0x00000001 /* follow across forks */ |
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#define NOTE_TRACKERR 0x00000002 /* could not track child */ |
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#define NOTE_CHILD 0x00000004 /* am a child process */ |
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/* |
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* data/hint flags for EVFILT_NETDEV, shared with userspace |
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*/ |
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#define NOTE_LINKUP 0x0001 /* link is up */ |
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#define NOTE_LINKDOWN 0x0002 /* link is down */ |
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#define NOTE_LINKINV 0x0004 /* link state is invalid */ |
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/* |
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* This is currently visible to userland to work around broken |
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* programs which pull in <sys/proc.h>. |
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*/ |
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#include <sys/queue.h> |
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#include <sys/_lock.h> |
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#include <sys/_mutex.h> |
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struct knote; |
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struct kqueue; |
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struct knlist { |
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struct klist kl_list; |
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void (*kl_lock)(void *); /* lock function */ |
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void (*kl_unlock)(void *); |
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int (*kl_locked)(void *); |
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void *kl_lockarg; /* argument passed to kl_lockf() */ |
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}; |
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#ifdef _KERNEL |
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#define KNLIST_EMPTY(list) SLIST_EMPTY(&(list)->kl_list) |
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/* |
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* Flag indicating hint is a signal. Used by EVFILT_SIGNAL, and also |
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* shared by EVFILT_PROC (all knotes attached to p->p_klist) |
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*/ |
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#define NOTE_SIGNAL 0x08000000 |
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struct filterops { |
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int f_isfd; /* true if ident == filedescriptor */ |
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int (*f_attach)(struct knote *kn); |
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void (*f_detach)(struct knote *kn); |
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int (*f_event)(struct knote *kn, long hint); |
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}; |
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/* |
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* Setting the KN_INFLUX flag enables you to unlock the kq that this knote |
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* is on, and modify kn_status as if you had the KQ lock. |
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* |
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* kn_sfflags, kn_sdata, and kn_kevent are protected by the knlist lock. |
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*/ |
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struct knote { |
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SLIST_ENTRY(knote) kn_link; /* for kq */ |
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SLIST_ENTRY(knote) kn_selnext; /* for struct selinfo */ |
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struct knlist *kn_knlist; /* f_attach populated */ |
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TAILQ_ENTRY(knote) kn_tqe; |
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struct kqueue *kn_kq; /* which queue we are on */ |
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struct kevent kn_kevent; |
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int kn_status; /* protected by kq lock */ |
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#define KN_ACTIVE 0x01 /* event has been triggered */ |
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#define KN_QUEUED 0x02 /* event is on queue */ |
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#define KN_DISABLED 0x04 /* event is disabled */ |
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#define KN_DETACHED 0x08 /* knote is detached */ |
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#define KN_INFLUX 0x10 /* knote is in flux */ |
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#define KN_MARKER 0x20 /* ignore this knote */ |
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#define KN_KQUEUE 0x40 /* this knote belongs to a kq */ |
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#define KN_HASKQLOCK 0x80 /* for _inevent */ |
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int kn_sfflags; /* saved filter flags */ |
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intptr_t kn_sdata; /* saved data field */ |
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union { |
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struct file *p_fp; /* file data pointer */ |
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struct proc *p_proc; /* proc pointer */ |
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} kn_ptr; |
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struct filterops *kn_fop; |
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void *kn_hook; |
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182 |
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#define kn_id kn_kevent.ident |
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#define kn_filter kn_kevent.filter |
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#define kn_flags kn_kevent.flags |
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#define kn_fflags kn_kevent.fflags |
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#define kn_data kn_kevent.data |
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#define kn_fp kn_ptr.p_fp |
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}; |
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struct kevent_copyops { |
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void *arg; |
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int (*k_copyout)(void *arg, struct kevent *kevp, int count); |
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int (*k_copyin)(void *arg, struct kevent *kevp, int count); |
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}; |
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struct thread; |
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struct proc; |
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struct knlist; |
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#endif /* !_KERNEL */ |
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#endif /* !_SYS_EVENT_H_ */ |