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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [sys/] [event.h] - Blame information for rev 207

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Line No. Rev Author Line
1 207 jeremybenn
/*-
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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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 *
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 *      $FreeBSD: src/sys/sys/event.h,v 1.19 2002/03/23 08:46:51 bde 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_SYSCOUNT         8
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#define EV_SET(kevp, a, b, c, d, e, f) do {     \
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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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        unsigned int *  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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        int *           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> or <sys/select.h>.
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 */
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#include <sys/queue.h> 
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struct knote;
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_KQUEUE);
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#endif
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#define KNOTE(list, hint)       if ((list) != NULL) knote(list, hint)
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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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struct knote {
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        SLIST_ENTRY(knote)      kn_link;        /* for fd */
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        SLIST_ENTRY(knote)      kn_selnext;     /* for struct selinfo */
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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;
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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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        caddr_t                 kn_hook;
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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_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 thread;
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struct proc;
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extern void     knote(struct klist *list, long hint);
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extern void     knote_remove(struct thread *p, struct klist *list);
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extern void     knote_fdclose(struct thread *p, int fd);
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extern int      kqueue_register(struct kqueue *kq,
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                    struct kevent *kev, struct thread *p);
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extern int      kqueue_add_filteropts(int filt, struct filterops *filtops);
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extern int      kqueue_del_filteropts(int filt);
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#else   /* !_KERNEL */
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#include <sys/cdefs.h>
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struct timespec;
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__BEGIN_DECLS
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int     kqueue(void);
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int     kevent(int kq, const struct kevent *changelist, int nchanges,
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            struct kevent *eventlist, int nevents,
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            const struct timespec *timeout);
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_EVENT_H_ */

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