mirror of
https://github.com/darlinghq/darling-libkqueue.git
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1d6fbd46d7
git-svn-id: svn://svn.code.sf.net/p/libkqueue/code/branches/trunk-merge@567 fb4e3144-bc1c-4b72-a658-5bcd248dd7f7
199 lines
6.9 KiB
C
199 lines
6.9 KiB
C
/*-
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* Copyright (c) 2009 Mark Heily <mark@heily.com>
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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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* $FreeBSD SVN Revision 197533$
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*/
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#ifndef _KQUEUE_H_
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#define _KQUEUE_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Determine if the platform provides a native kqueue() subsystem */
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#if defined(__Darwin__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# include <sys/event.h>
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# define kqueue_t int
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# define kqueue_open kqueue
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# define KQUEUE_OPEN_ERROR -1
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# define kqueue_close close
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#else
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#include <sys/types.h>
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#ifdef __KERNEL__
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#define intptr_t long
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#else
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <stdint.h>
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#define LIBKQUEUE 1
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#endif
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struct timespec;
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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_FS (-9) /* filesystem events */
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#define EVFILT_LIO (-10) /* attached to lio requests */
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#define EVFILT_USER (-11) /* User events */
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#define EVFILT_SYSCOUNT 11
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#define EV_SET(kevp_, a, b, c, d, e, f) do { \
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struct kevent *kevp = (kevp_); \
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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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uintptr_t ident; /* identifier for this event */
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short filter; /* filter for event */
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unsigned short flags;
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unsigned int fflags;
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intptr_t 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_RECEIPT 0x0040 /* force EV_ERROR on success, data=0 */
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#define EV_DISPATCH 0x0080 /* disable event 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/masks for EVFILT_USER
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*
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* On input, the top two bits of fflags specifies how the lower twenty four
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* bits should be applied to the stored value of fflags.
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*
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* On output, the top two bits will always be set to NOTE_FFNOP and the
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* remaining twenty four bits will contain the stored fflags value.
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*/
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#define NOTE_FFNOP 0x00000000 /* ignore input fflags */
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#define NOTE_FFAND 0x40000000 /* AND fflags */
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#define NOTE_FFOR 0x80000000 /* OR fflags */
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#define NOTE_FFCOPY 0xc0000000 /* copy fflags */
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#define NOTE_FFCTRLMASK 0xc0000000 /* masks for operations */
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#define NOTE_FFLAGSMASK 0x00ffffff
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#define NOTE_TRIGGER 0x01000000 /* Cause the event to be
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triggered for output. */
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/*
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* data/hint flags for EVFILT_{READ|WRITE}
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*/
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#define NOTE_LOWAT 0x0001 /* low water mark */
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#undef NOTE_LOWAT /* Not supported on Linux */
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/*
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* data/hint flags for EVFILT_VNODE
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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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#undef NOTE_REVOKE /* Not supported on Linux */
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/*
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* data/hint flags for EVFILT_PROC
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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
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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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/* KLUDGE: This is from <sys/mount.h> on FreeBSD and is used by
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the EVFILT_FS filter. */
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/* vfsquery flags */
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#define VQ_NOTRESP 0x0001 /* server down */
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#define VQ_NEEDAUTH 0x0002 /* server bad auth */
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#define VQ_LOWDISK 0x0004 /* we're low on space */
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#define VQ_MOUNT 0x0008 /* new filesystem arrived */
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#define VQ_UNMOUNT 0x0010 /* filesystem has left */
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#define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */
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#define VQ_ASSIST 0x0040 /* filesystem needs assistance from external
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program */
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#define VQ_NOTRESPLOCK 0x0080 /* server lockd down */
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struct kqueue;
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# define kqueue_t struct kqueue *
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# define KQUEUE_OPEN_ERROR ((void *)-1)
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# define kevent(a,b,c,d,e,f) kevent_compat(a,b,c,d,e,f)
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kqueue_t kqueue_open(void);
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int kqueue_close(kqueue_t kq);
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int kevent_compat(kqueue_t 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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#endif /* Non-native kqueue platform */
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#ifdef __cplusplus
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}
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#endif
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#endif /* !_KQUEUE_H_ */
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