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[src/trunk]: src/sys/sys freebsd kqueue implementation
details: https://anonhg.NetBSD.org/src/rev/bed78c9f3dcc
branches: trunk
changeset: 504178:bed78c9f3dcc
user: lukem <lukem%NetBSD.org@localhost>
date: Sat Feb 24 11:11:36 2001 +0000
description:
freebsd kqueue implementation
diffstat:
sys/sys/event.h | 181 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 181 insertions(+), 0 deletions(-)
diffs (185 lines):
diff -r a5cb07c1a975 -r bed78c9f3dcc sys/sys/event.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/sys/event.h Sat Feb 24 11:11:36 2001 +0000
@@ -0,0 +1,181 @@
+/*-
+ * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon%FreeBSD.org@localhost>
+ * 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: src/sys/sys/event.h,v 1.12 2001/02/24 01:44:03 jlemon Exp $
+ */
+
+#ifndef _SYS_EVENT_H_
+#define _SYS_EVENT_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_SYSCOUNT 6
+
+#define EV_SET(kevp, a, b, c, d, e, f) do { \
+ (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 */
+ u_short flags;
+ u_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) */
+
+/* flags */
+#define EV_ONESHOT 0x0010 /* only report one occurrence */
+#define EV_CLEAR 0x0020 /* clear event state after reporting */
+
+#define EV_SYSFLAGS 0xF000 /* reserved by system */
+#define EV_FLAG1 0x2000 /* filter-specific flag */
+
+/* returned values */
+#define EV_EOF 0x8000 /* EOF detected */
+#define EV_ERROR 0x4000 /* error, data contains errno */
+
+/*
+ * data/hint flags for EVFILT_{READ|WRITE}, shared with userspace
+ */
+#define NOTE_LOWAT 0x0001 /* low water mark */
+
+/*
+ * 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 */
+
+/*
+ * data/hint flags for EVFILT_PROC, 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 */
+
+/*
+ * This is currently visible to userland to work around broken
+ * programs which pull in <sys/proc.h> or <sys/select.h>.
+ */
+#include <sys/queue.h>
+struct knote;
+SLIST_HEAD(klist, knote);
+
+#ifdef _KERNEL
+
+#define KNOTE(list, hint) if ((list) != NULL) knote(list, hint)
+
+/*
+ * 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
+
+struct filterops {
+ int f_isfd; /* true if ident == filedescriptor */
+ int (*f_attach) __P((struct knote *kn));
+ void (*f_detach) __P((struct knote *kn));
+ int (*f_event) __P((struct knote *kn, long hint));
+};
+
+struct knote {
+ SLIST_ENTRY(knote) kn_link; /* for fd */
+ SLIST_ENTRY(knote) kn_selnext; /* for struct selinfo */
+ TAILQ_ENTRY(knote) kn_tqe;
+ struct kqueue *kn_kq; /* which queue we are on */
+ struct kevent kn_kevent;
+ int kn_status;
+ 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 */
+ } kn_ptr;
+ struct filterops *kn_fop;
+ caddr_t kn_hook;
+#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_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 proc;
+
+extern void knote(struct klist *list, long hint);
+extern void knote_remove(struct proc *p, struct klist *list);
+extern void knote_fdclose(struct proc *p, int fd);
+extern int kqueue_register(struct kqueue *kq,
+ struct kevent *kev, struct proc *p);
+
+#else /* !_KERNEL */
+
+#include <sys/cdefs.h>
+struct timespec;
+
+__BEGIN_DECLS
+int kqueue __P((void));
+int kevent __P((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_ */
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