160 lines
6.1 KiB
C
160 lines
6.1 KiB
C
/*
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* Copyright (C) 2017 THL A29 Limited, a Tencent company.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _FSTACK_EVENT_H
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#define _FSTACK_EVENT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _KERNEL
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#include <stdint.h>
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#include <sys/queue.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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/* EVFILT_NETDEV (-8) no longer supported */
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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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u_short flags;
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u_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_DROP 0x1000 /* note should be dropped */
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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, shared with userspace
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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}, 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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struct knote;
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SLIST_HEAD(klist, knote);
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struct kqueue;
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TAILQ_HEAD(kqlist, kqueue);
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struct knlist {
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struct klist kl_list;
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void (*kl_lock)(void *); /* lock function */
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void (*kl_unlock)(void *);
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void (*kl_assert_locked)(void *);
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void (*kl_assert_unlocked)(void *);
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void *kl_lockarg; /* argument passed to kl_lockf() */
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};
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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