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Diffstat (limited to 'cpukit/libcsupport/include/sys/event.h')
-rw-r--r-- | cpukit/libcsupport/include/sys/event.h | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/cpukit/libcsupport/include/sys/event.h b/cpukit/libcsupport/include/sys/event.h deleted file mode 100644 index bc18aa90ea..0000000000 --- a/cpukit/libcsupport/include/sys/event.h +++ /dev/null @@ -1,303 +0,0 @@ -/*- - * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@FreeBSD.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD: head/sys/sys/event.h 313704 2017-02-13 19:00:09Z ed $ - */ - -#ifndef _SYS_EVENT_H_ -#define _SYS_EVENT_H_ - -#include <sys/_types.h> -#include <sys/queue.h> - -#define EVFILT_READ (-1) -#define EVFILT_WRITE (-2) -#define EVFILT_AIO (-3) /* attached to aio requests */ -#define EVFILT_VNODE (-4) /* attached to vnodes */ -#define EVFILT_PROC (-5) /* attached to struct proc */ -#define EVFILT_SIGNAL (-6) /* attached to struct proc */ -#define EVFILT_TIMER (-7) /* timers */ -#define EVFILT_PROCDESC (-8) /* attached to process descriptors */ -#define EVFILT_FS (-9) /* filesystem events */ -#define EVFILT_LIO (-10) /* attached to lio requests */ -#define EVFILT_USER (-11) /* User events */ -#define EVFILT_SENDFILE (-12) /* attached to sendfile requests */ -#define EVFILT_EMPTY (-13) /* empty send socket buf */ -#define EVFILT_SYSCOUNT 13 - -#define EV_SET(kevp_, a, b, c, d, e, f) do { \ - struct kevent *kevp = (kevp_); \ - (kevp)->ident = (a); \ - (kevp)->filter = (b); \ - (kevp)->flags = (c); \ - (kevp)->fflags = (d); \ - (kevp)->data = (e); \ - (kevp)->udata = (f); \ -} while(0) - -struct kevent { - __uintptr_t ident; /* identifier for this event */ - short filter; /* filter for event */ - unsigned short flags; - unsigned int fflags; - __intptr_t data; - void *udata; /* opaque user data identifier */ -}; - -/* actions */ -#define EV_ADD 0x0001 /* add event to kq (implies enable) */ -#define EV_DELETE 0x0002 /* delete event from kq */ -#define EV_ENABLE 0x0004 /* enable event */ -#define EV_DISABLE 0x0008 /* disable event (not reported) */ -#define EV_FORCEONESHOT 0x0100 /* enable _ONESHOT and force trigger */ - -/* flags */ -#define EV_ONESHOT 0x0010 /* only report one occurrence */ -#define EV_CLEAR 0x0020 /* clear event state after reporting */ -#define EV_RECEIPT 0x0040 /* force EV_ERROR on success, data=0 */ -#define EV_DISPATCH 0x0080 /* disable event after reporting */ - -#define EV_SYSFLAGS 0xF000 /* reserved by system */ -#define EV_DROP 0x1000 /* note should be dropped */ -#define EV_FLAG1 0x2000 /* filter-specific flag */ -#define EV_FLAG2 0x4000 /* filter-specific flag */ - -/* returned values */ -#define EV_EOF 0x8000 /* EOF detected */ -#define EV_ERROR 0x4000 /* error, data contains errno */ - - /* - * data/hint flags/masks for EVFILT_USER, shared with userspace - * - * On input, the top two bits of fflags specifies how the lower twenty four - * bits should be applied to the stored value of fflags. - * - * On output, the top two bits will always be set to NOTE_FFNOP and the - * remaining twenty four bits will contain the stored fflags value. - */ -#define NOTE_FFNOP 0x00000000 /* ignore input fflags */ -#define NOTE_FFAND 0x40000000 /* AND fflags */ -#define NOTE_FFOR 0x80000000 /* OR fflags */ -#define NOTE_FFCOPY 0xc0000000 /* copy fflags */ -#define NOTE_FFCTRLMASK 0xc0000000 /* masks for operations */ -#define NOTE_FFLAGSMASK 0x00ffffff - -#define NOTE_TRIGGER 0x01000000 /* Cause the event to be - triggered for output. */ - -/* - * data/hint flags for EVFILT_{READ|WRITE}, shared with userspace - */ -#define NOTE_LOWAT 0x0001 /* low water mark */ -#define NOTE_FILE_POLL 0x0002 /* behave like poll() */ - -/* - * data/hint flags for EVFILT_VNODE, shared with userspace - */ -#define NOTE_DELETE 0x0001 /* vnode was removed */ -#define NOTE_WRITE 0x0002 /* data contents changed */ -#define NOTE_EXTEND 0x0004 /* size increased */ -#define NOTE_ATTRIB 0x0008 /* attributes changed */ -#define NOTE_LINK 0x0010 /* link count changed */ -#define NOTE_RENAME 0x0020 /* vnode was renamed */ -#define NOTE_REVOKE 0x0040 /* vnode access was revoked */ -#define NOTE_OPEN 0x0080 /* vnode was opened */ -#define NOTE_CLOSE 0x0100 /* file closed, fd did not - allowed write */ -#define NOTE_CLOSE_WRITE 0x0200 /* file closed, fd did allowed - write */ -#define NOTE_READ 0x0400 /* file was read */ - -/* - * data/hint flags for EVFILT_PROC and EVFILT_PROCDESC, shared with userspace - */ -#define NOTE_EXIT 0x80000000 /* process exited */ -#define NOTE_FORK 0x40000000 /* process forked */ -#define NOTE_EXEC 0x20000000 /* process exec'd */ -#define NOTE_PCTRLMASK 0xf0000000 /* mask for hint bits */ -#define NOTE_PDATAMASK 0x000fffff /* mask for pid */ - -/* additional flags for EVFILT_PROC */ -#define NOTE_TRACK 0x00000001 /* follow across forks */ -#define NOTE_TRACKERR 0x00000002 /* could not track child */ -#define NOTE_CHILD 0x00000004 /* am a child process */ - -/* additional flags for EVFILT_TIMER */ -#define NOTE_SECONDS 0x00000001 /* data is seconds */ -#define NOTE_MSECONDS 0x00000002 /* data is milliseconds */ -#define NOTE_USECONDS 0x00000004 /* data is microseconds */ -#define NOTE_NSECONDS 0x00000008 /* data is nanoseconds */ - -struct knote; -SLIST_HEAD(klist, knote); -struct kqueue; -TAILQ_HEAD(kqlist, kqueue); -struct knlist { - struct klist kl_list; - void (*kl_lock)(void *); /* lock function */ - void (*kl_unlock)(void *); - void (*kl_assert_locked)(void *); - void (*kl_assert_unlocked)(void *); - void *kl_lockarg; /* argument passed to lock functions */ - int kl_autodestroy; -}; - - -#ifdef _KERNEL - -/* - * Flags for knote call - */ -#define KNF_LISTLOCKED 0x0001 /* knlist is locked */ -#define KNF_NOKQLOCK 0x0002 /* do not keep KQ_LOCK */ - -#define KNOTE(list, hist, flags) knote(list, hist, flags) -#define KNOTE_LOCKED(list, hint) knote(list, hint, KNF_LISTLOCKED) -#define KNOTE_UNLOCKED(list, hint) knote(list, hint, 0) - -#define KNLIST_EMPTY(list) SLIST_EMPTY(&(list)->kl_list) - -/* - * Flag indicating hint is a signal. Used by EVFILT_SIGNAL, and also - * shared by EVFILT_PROC (all knotes attached to p->p_klist) - */ -#define NOTE_SIGNAL 0x08000000 - -/* - * Hint values for the optional f_touch event filter. If f_touch is not set - * to NULL and f_isfd is zero the f_touch filter will be called with the type - * argument set to EVENT_REGISTER during a kevent() system call. It is also - * called under the same conditions with the type argument set to EVENT_PROCESS - * when the event has been triggered. - */ -#define EVENT_REGISTER 1 -#define EVENT_PROCESS 2 - -struct filterops { - int f_isfd; /* true if ident == filedescriptor */ - int (*f_attach)(struct knote *kn); - void (*f_detach)(struct knote *kn); - int (*f_event)(struct knote *kn, long hint); - void (*f_touch)(struct knote *kn, struct kevent *kev, u_long type); -}; - -/* - * An in-flux knote cannot be dropped from its kq while the kq is - * unlocked. If the KN_SCAN flag is not set, a thread can only set - * kn_influx when it is exclusive owner of the knote state, and can - * modify kn_status as if it had the KQ lock. KN_SCAN must not be set - * on a knote which is already in flux. - * - * kn_sfflags, kn_sdata, and kn_kevent are protected by the knlist lock. - */ -struct knote { - SLIST_ENTRY(knote) kn_link; /* for kq */ - SLIST_ENTRY(knote) kn_selnext; /* for struct selinfo */ - struct knlist *kn_knlist; /* f_attach populated */ - TAILQ_ENTRY(knote) kn_tqe; - struct kqueue *kn_kq; /* which queue we are on */ - struct kevent kn_kevent; - void *kn_hook; - int kn_hookid; - int kn_status; /* protected by kq lock */ -#define KN_ACTIVE 0x01 /* event has been triggered */ -#define KN_QUEUED 0x02 /* event is on queue */ -#define KN_DISABLED 0x04 /* event is disabled */ -#define KN_DETACHED 0x08 /* knote is detached */ -#define KN_MARKER 0x20 /* ignore this knote */ -#define KN_KQUEUE 0x40 /* this knote belongs to a kq */ -#define KN_HASKQLOCK 0x80 /* for _inevent */ -#define KN_SCAN 0x100 /* flux set in kqueue_scan() */ - int kn_influx; - int kn_sfflags; /* saved filter flags */ - intptr_t kn_sdata; /* saved data field */ - union { - struct file *p_fp; /* file data pointer */ - struct proc *p_proc; /* proc pointer */ - struct kaiocb *p_aio; /* AIO job pointer */ - struct aioliojob *p_lio; /* LIO job pointer */ - void *p_v; /* generic other pointer */ - } kn_ptr; - struct filterops *kn_fop; - -#define kn_id kn_kevent.ident -#define kn_filter kn_kevent.filter -#define kn_flags kn_kevent.flags -#define kn_fflags kn_kevent.fflags -#define kn_data kn_kevent.data -#define kn_fp kn_ptr.p_fp -}; -struct kevent_copyops { - void *arg; - int (*k_copyout)(void *arg, struct kevent *kevp, int count); - int (*k_copyin)(void *arg, struct kevent *kevp, int count); -}; - -struct thread; -struct proc; -struct knlist; -struct mtx; -struct rwlock; - -void knote(struct knlist *list, long hint, int lockflags); -void knote_fork(struct knlist *list, int pid); -struct knlist *knlist_alloc(struct mtx *lock); -void knlist_detach(struct knlist *knl); -void knlist_add(struct knlist *knl, struct knote *kn, int islocked); -void knlist_remove(struct knlist *knl, struct knote *kn, int islocked); -int knlist_empty(struct knlist *knl); -void knlist_init(struct knlist *knl, void *lock, void (*kl_lock)(void *), - void (*kl_unlock)(void *), void (*kl_assert_locked)(void *), - void (*kl_assert_unlocked)(void *)); -void knlist_init_mtx(struct knlist *knl, struct mtx *lock); -void knlist_init_rw_reader(struct knlist *knl, struct rwlock *lock); -void knlist_destroy(struct knlist *knl); -void knlist_cleardel(struct knlist *knl, struct thread *td, - int islocked, int killkn); -#define knlist_clear(knl, islocked) \ - knlist_cleardel((knl), NULL, (islocked), 0) -#define knlist_delete(knl, td, islocked) \ - knlist_cleardel((knl), (td), (islocked), 1) -void knote_fdclose(struct thread *p, int fd); -int kqfd_register(int fd, struct kevent *kev, struct thread *p, - int waitok); -int kqueue_add_filteropts(int filt, struct filterops *filtops); -int kqueue_del_filteropts(int filt); - -#else /* !_KERNEL */ - -#include <sys/cdefs.h> -struct timespec; - -__BEGIN_DECLS -int kqueue(void); -int kevent(int kq, const struct kevent *changelist, int nchanges, - struct kevent *eventlist, int nevents, - const struct timespec *timeout); -__END_DECLS - -#endif /* !_KERNEL */ - -#endif /* !_SYS_EVENT_H_ */ |