1 /*- 2 * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/sys/event.h,v 1.22 2003/02/02 19:39:51 nectar Exp $ 27 */ 28 29 #ifndef _TIRPC_EVENT_H_ 30 #define _TIRPC_EVENT_H_ 31 32 #define EVFILT_READ (-1) 33 #define EVFILT_WRITE (-2) 34 #define EVFILT_AIO (-3) /* attached to aio requests */ 35 #define EVFILT_VNODE (-4) /* attached to vnodes */ 36 #define EVFILT_PROC (-5) /* attached to struct proc */ 37 #define EVFILT_SIGNAL (-6) /* attached to struct proc */ 38 #define EVFILT_TIMER (-7) /* timers */ 39 #define EVFILT_NETDEV (-8) /* network devices */ 40 41 #define EVFILT_SYSCOUNT 8 42 43 #define EV_SET(kevp_, a, b, c, d, e, f) do { \ 44 struct kevent *kevp = (kevp_); \ 45 (kevp)->ident = (a); \ 46 (kevp)->filter = (b); \ 47 (kevp)->flags = (c); \ 48 (kevp)->fflags = (d); \ 49 (kevp)->data = (e); \ 50 (kevp)->udata = (f); \ 51 } while(0) 52 53 #include <stdint.h> 54 55 struct kevent { 56 uintptr_t ident; /* identifier for this event */ 57 short filter; /* filter for event */ 58 u_short flags; 59 u_int fflags; 60 intptr_t data; 61 void *udata; /* opaque user data identifier */ 62 }; 63 64 /* actions */ 65 #define EV_ADD 0x0001 /* add event to kq (implies enable) */ 66 #define EV_DELETE 0x0002 /* delete event from kq */ 67 #define EV_ENABLE 0x0004 /* enable event */ 68 #define EV_DISABLE 0x0008 /* disable event (not reported) */ 69 70 /* flags */ 71 #define EV_ONESHOT 0x0010 /* only report one occurrence */ 72 #define EV_CLEAR 0x0020 /* clear event state after reporting */ 73 74 #define EV_SYSFLAGS 0xF000 /* reserved by system */ 75 #define EV_FLAG1 0x2000 /* filter-specific flag */ 76 77 /* returned values */ 78 #define EV_EOF 0x8000 /* EOF detected */ 79 #define EV_ERROR 0x4000 /* error, data contains errno */ 80 81 /* 82 * data/hint flags for EVFILT_{READ|WRITE}, shared with userspace 83 */ 84 #define NOTE_LOWAT 0x0001 /* low water mark */ 85 86 /* 87 * data/hint flags for EVFILT_VNODE, shared with userspace 88 */ 89 #define NOTE_DELETE 0x0001 /* vnode was removed */ 90 #define NOTE_WRITE 0x0002 /* data contents changed */ 91 #define NOTE_EXTEND 0x0004 /* size increased */ 92 #define NOTE_ATTRIB 0x0008 /* attributes changed */ 93 #define NOTE_LINK 0x0010 /* link count changed */ 94 #define NOTE_RENAME 0x0020 /* vnode was renamed */ 95 #define NOTE_REVOKE 0x0040 /* vnode access was revoked */ 96 97 /* 98 * data/hint flags for EVFILT_PROC, shared with userspace 99 */ 100 #define NOTE_EXIT 0x80000000 /* process exited */ 101 #define NOTE_FORK 0x40000000 /* process forked */ 102 #define NOTE_EXEC 0x20000000 /* process exec'd */ 103 #define NOTE_PCTRLMASK 0xf0000000 /* mask for hint bits */ 104 #define NOTE_PDATAMASK 0x000fffff /* mask for pid */ 105 106 /* additional flags for EVFILT_PROC */ 107 #define NOTE_TRACK 0x00000001 /* follow across forks */ 108 #define NOTE_TRACKERR 0x00000002 /* could not track child */ 109 #define NOTE_CHILD 0x00000004 /* am a child process */ 110 111 /* 112 * data/hint flags for EVFILT_NETDEV, shared with userspace 113 */ 114 #define NOTE_LINKUP 0x0001 /* link is up */ 115 #define NOTE_LINKDOWN 0x0002 /* link is down */ 116 #define NOTE_LINKINV 0x0004 /* link state is invalid */ 117 118 /* 119 * This is currently visible to userland to work around broken 120 * programs which pull in <sys/proc.h>. 121 */ 122 #include <sys/queue.h> 123 124 struct knote; 125 SLIST_HEAD(klist, knote); 126 127 #ifdef _KERNEL 128 129 #ifdef MALLOC_DECLARE 130 MALLOC_DECLARE(M_KQUEUE); 131 #endif 132 133 #define KNOTE(list, hint) if ((list) != NULL) knote(list, hint) 134 135 /* 136 * Flag indicating hint is a signal. Used by EVFILT_SIGNAL, and also 137 * shared by EVFILT_PROC (all knotes attached to p->p_klist) 138 */ 139 #define NOTE_SIGNAL 0x08000000 140 141 struct filterops { 142 int f_isfd; /* true if ident == filedescriptor */ 143 int (*f_attach)(struct knote *kn); 144 void (*f_detach)(struct knote *kn); 145 int (*f_event)(struct knote *kn, long hint); 146 }; 147 148 struct knote { 149 SLIST_ENTRY(knote) kn_link; /* for fd */ 150 SLIST_ENTRY(knote) kn_selnext; /* for struct selinfo */ 151 TAILQ_ENTRY(knote) kn_tqe; 152 struct kqueue *kn_kq; /* which queue we are on */ 153 struct kevent kn_kevent; 154 int kn_status; 155 int kn_sfflags; /* saved filter flags */ 156 intptr_t kn_sdata; /* saved data field */ 157 union { 158 struct file *p_fp; /* file data pointer */ 159 struct proc *p_proc; /* proc pointer */ 160 } kn_ptr; 161 struct filterops *kn_fop; 162 void *kn_hook; 163 #define KN_ACTIVE 0x01 /* event has been triggered */ 164 #define KN_QUEUED 0x02 /* event is on queue */ 165 #define KN_DISABLED 0x04 /* event is disabled */ 166 #define KN_DETACHED 0x08 /* knote is detached */ 167 168 #define kn_id kn_kevent.ident 169 #define kn_filter kn_kevent.filter 170 #define kn_flags kn_kevent.flags 171 #define kn_fflags kn_kevent.fflags 172 #define kn_data kn_kevent.data 173 #define kn_fp kn_ptr.p_fp 174 }; 175 176 struct thread; 177 struct proc; 178 179 extern void knote(struct klist *list, long hint); 180 extern void knote_remove(struct thread *p, struct klist *list); 181 extern void knote_fdclose(struct thread *p, int fd); 182 extern int kqueue_register(struct kqueue *kq, 183 struct kevent *kev, struct thread *p); 184 extern int kqueue_add_filteropts(int filt, struct filterops *filtops); 185 extern int kqueue_del_filteropts(int filt); 186 187 #else /* !_KERNEL */ 188 189 //#include <sys/cdefs.h> 190 struct timespec; 191 192 __BEGIN_DECLS 193 int kqueue(void); 194 int kevent(int kq, const struct kevent *changelist, int nchanges, 195 struct kevent *eventlist, int nevents, 196 const struct timespec *timeout); 197 __END_DECLS 198 199 #endif /* !_KERNEL */ 200 201 #endif /* !_TIRPC_EVENT_H_ */ 202