Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/ntirpc/misc/event.h


$ cat -n /usr/include/ntirpc/misc/event.h

     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	#include <sys/types.h>
    33	
    34	#define EVFILT_READ		(-1)
    35	#define EVFILT_WRITE		(-2)
    36	#define EVFILT_AIO		(-3)	/* attached to aio requests */
    37	#define EVFILT_VNODE		(-4)	/* attached to vnodes */
    38	#define EVFILT_PROC		(-5)	/* attached to struct proc */
    39	#define EVFILT_SIGNAL		(-6)	/* attached to struct proc */
    40	#define EVFILT_TIMER		(-7)	/* timers */
    41	#define EVFILT_NETDEV		(-8)	/* network devices */
    42	
    43	#define EVFILT_SYSCOUNT		8
    44	
    45	#define EV_SET(kevp_, a, b, c, d, e, f) do {	\
    46		struct kevent *kevp = (kevp_);		\
    47		(kevp)->ident = (a);			\
    48		(kevp)->filter = (b);			\
    49		(kevp)->flags = (c);			\
    50		(kevp)->fflags = (d);			\
    51		(kevp)->data = (e);			\
    52		(kevp)->udata = (f);			\
    53	} while (0)
    54	
    55	#include <stdint.h>
    56	
    57	struct kevent {
    58		uintptr_t ident;	/* identifier for this event */
    59		short filter;		/* filter for event */
    60		u_short flags;
    61		u_int fflags;
    62		intptr_t data;
    63		void *udata;		/* opaque user data identifier */
    64	};
    65	
    66	/* actions */
    67	#define EV_ADD		0x0001	/* add event to kq (implies enable) */
    68	#define EV_DELETE	0x0002	/* delete event from kq */
    69	#define EV_ENABLE	0x0004	/* enable event */
    70	#define EV_DISABLE	0x0008	/* disable event (not reported) */
    71	
    72	/* flags */
    73	#define EV_ONESHOT	0x0010	/* only report one occurrence */
    74	#define EV_CLEAR	0x0020	/* clear event state after reporting */
    75	
    76	#define EV_SYSFLAGS	0xF000	/* reserved by system */
    77	#define EV_FLAG1	0x2000	/* filter-specific flag */
    78	
    79	/* returned values */
    80	#define EV_EOF		0x8000	/* EOF detected */
    81	#define EV_ERROR	0x4000	/* error, data contains errno */
    82	
    83	/*
    84	 * data/hint flags for EVFILT_{READ|WRITE}, shared with userspace
    85	 */
    86	#define NOTE_LOWAT	0x0001	/* low water mark */
    87	
    88	/*
    89	 * data/hint flags for EVFILT_VNODE, shared with userspace
    90	 */
    91	#define	NOTE_DELETE	0x0001	/* vnode was removed */
    92	#define	NOTE_WRITE	0x0002	/* data contents changed */
    93	#define	NOTE_EXTEND	0x0004	/* size increased */
    94	#define	NOTE_ATTRIB	0x0008	/* attributes changed */
    95	#define	NOTE_LINK	0x0010	/* link count changed */
    96	#define	NOTE_RENAME	0x0020	/* vnode was renamed */
    97	#define	NOTE_REVOKE	0x0040	/* vnode access was revoked */
    98	
    99	/*
   100	 * data/hint flags for EVFILT_PROC, shared with userspace
   101	 */
   102	#define	NOTE_EXIT	0x80000000	/* process exited */
   103	#define	NOTE_FORK	0x40000000	/* process forked */
   104	#define	NOTE_EXEC	0x20000000	/* process exec'd */
   105	#define	NOTE_PCTRLMASK	0xf0000000	/* mask for hint bits */
   106	#define	NOTE_PDATAMASK	0x000fffff	/* mask for pid */
   107	
   108	/* additional flags for EVFILT_PROC */
   109	#define	NOTE_TRACK	0x00000001	/* follow across forks */
   110	#define	NOTE_TRACKERR	0x00000002	/* could not track child */
   111	#define	NOTE_CHILD	0x00000004	/* am a child process */
   112	
   113	/*
   114	 * data/hint flags for EVFILT_NETDEV, shared with userspace
   115	 */
   116	#define NOTE_LINKUP	0x0001	/* link is up */
   117	#define NOTE_LINKDOWN	0x0002	/* link is down */
   118	#define NOTE_LINKINV	0x0004	/* link state is invalid */
   119	
   120	/*
   121	 * This is currently visible to userland to work around broken
   122	 * programs which pull in <sys/proc.h>.
   123	 */
   124	#include <misc/queue.h>
   125	
   126	struct knote;
   127	SLIST_HEAD(klist, knote);
   128	
   129	#ifdef _KERNEL
   130	
   131	#ifdef MALLOC_DECLARE
   132	MALLOC_DECLARE(M_KQUEUE);
   133	#endif
   134	
   135	#define KNOTE(list, hint) if ((list) != NULL) knote(list, hint)
   136	
   137	/*
   138	 * Flag indicating hint is a signal.  Used by EVFILT_SIGNAL, and also
   139	 * shared by EVFILT_PROC  (all knotes attached to p->p_klist)
   140	 */
   141	#define NOTE_SIGNAL	0x08000000
   142	
   143	struct filterops {
   144		int f_isfd;		/* true if ident == filedescriptor */
   145		int (*f_attach) (struct knote *kn);
   146		void (*f_detach) (struct knote *kn);
   147		int (*f_event) (struct knote *kn, long hint);
   148	};
   149	
   150	struct knote {
   151		SLIST_ENTRY(knote) kn_link;	/* for fd */
   152		SLIST_ENTRY(knote) kn_selnext;	/* for struct selinfo */
   153		TAILQ_ENTRY(knote) kn_tqe;
   154		struct kqueue *kn_kq;	/* which queue we are on */
   155		struct kevent kn_kevent;
   156		int kn_status;
   157		int kn_sfflags;		/* saved filter flags */
   158		intptr_t kn_sdata;	/* saved data field */
   159		union {
   160			struct file *p_fp;	/* file data pointer */
   161			struct proc *p_proc;	/* proc pointer */
   162		} kn_ptr;
   163		struct filterops *kn_fop;
   164		void *kn_hook;
   165	#define KN_ACTIVE	0x01	/* event has been triggered */
   166	#define KN_QUEUED	0x02	/* event is on queue */
   167	#define KN_DISABLED	0x04	/* event is disabled */
   168	#define KN_DETACHED	0x08	/* knote is detached */
   169	
   170	#define kn_id		kn_kevent.ident
   171	#define kn_filter	kn_kevent.filter
   172	#define kn_flags	kn_kevent.flags
   173	#define kn_fflags	kn_kevent.fflags
   174	#define kn_data		kn_kevent.data
   175	#define kn_fp		kn_ptr.p_fp
   176	};
   177	
   178	struct thread;
   179	struct proc;
   180	
   181	extern void knote(struct klist *list, long hint);
   182	extern void knote_remove(struct thread *p, struct klist *list);
   183	extern void knote_fdclose(struct thread *p, int fd);
   184	extern int kqueue_register(struct kqueue *kq, struct kevent *kev,
   185				   struct thread *p);
   186	extern int kqueue_add_filteropts(int filt, struct filterops *filtops);
   187	extern int kqueue_del_filteropts(int filt);
   188	
   189	#else				/* !_KERNEL */
   190	
   191	#include <sys/cdefs.h>
   192	struct timespec;
   193	
   194	__BEGIN_DECLS int kqueue(void);
   195	int kevent(int kq, const struct kevent *changelist, int nchanges,
   196		   struct kevent *eventlist, int nevents,
   197		   const struct timespec *timeout);
   198	__END_DECLS
   199	#endif				/* !_KERNEL */
   200	#endif				/* !_TIRPC_EVENT_H_ */