FreeBSD/Linux Kernel Cross Reference
sys/compat/netbsd32/netbsd32_event.c

     /*      $NetBSD: netbsd32_event.c,v 1.6 2008/04/29 06:53:02 martin Exp $        */
     
     /*
      *  Copyright (c) 2005 The NetBSD Foundation.
      *  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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.6 2008/04/29 06:53:02 martin Exp $");
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/file.h>
    #include <sys/filedesc.h>
    #include <sys/select.h>
    #include <sys/event.h>
    #include <sys/eventvar.h>
    #include <sys/malloc.h>
    #include <sys/proc.h>
    #include <sys/dirent.h>
    
    #include <compat/netbsd32/netbsd32.h>
    #include <compat/netbsd32/netbsd32_syscall.h>
    #include <compat/netbsd32/netbsd32_syscallargs.h>
    #include <compat/netbsd32/netbsd32_conv.h>
    
    static int
    netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
    {
            struct netbsd32_timespec ts32;
            int error;
    
            KASSERT(length == sizeof(struct timespec));
    
            error = copyin(src, &ts32, sizeof(ts32));
            if (error)
                    return error;
            netbsd32_to_timespec(&ts32, (struct timespec *)dest);
            return 0;
    }
    
    static int
    netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
        struct kevent *changes, size_t index, int n)
    {
            const struct netbsd32_kevent *src =
                (const struct netbsd32_kevent *)changelist;
            struct netbsd32_kevent *kev32, *changes32 = private;
            int error, i;
    
            error = copyin(src + index, changes32, n * sizeof(*changes32));
            if (error)
                    return error;
            for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
                    netbsd32_to_kevent(kev32, changes);
            return 0;
    }
    
    static int
    netbsd32_kevent_put_events(void *private, struct kevent *events,
        struct kevent *eventlist, size_t index, int n)
    {
            struct netbsd32_kevent *kev32, *events32 = private;
            int i;
    
            for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
                    netbsd32_from_kevent(events, kev32);
            kev32 = (struct netbsd32_kevent *)eventlist;
            return  copyout(events32, kev32, n * sizeof(*events32));
    }
    
    int
    netbsd32_kevent(struct lwp *l, const struct netbsd32_kevent_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(int) fd;
                    syscallarg(netbsd32_keventp_t) changelist;
                   syscallarg(netbsd32_size_t) nchanges;
                   syscallarg(netbsd32_keventp_t) eventlist;
                   syscallarg(netbsd32_size_t) nevents;
                   syscallarg(netbsd32_timespecp_t) timeout;
           } */
           int error;
           size_t maxalloc, nchanges, nevents;
           struct kevent_ops netbsd32_kevent_ops = {
                   keo_fetch_timeout: netbsd32_kevent_fetch_timeout,
                   keo_fetch_changes: netbsd32_kevent_fetch_changes,
                   keo_put_events: netbsd32_kevent_put_events,
           };
   
           nchanges = SCARG(uap, nchanges);
           nevents = SCARG(uap, nevents);
           maxalloc = MIN(KQ_NEVENTS, MAX(nchanges, nevents));
           netbsd32_kevent_ops.keo_private =
               malloc(maxalloc * sizeof(struct netbsd32_kevent), M_TEMP,
               M_WAITOK);
   
           error = kevent1(retval, SCARG(uap, fd),
               NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
               NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
               NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
   
           free(netbsd32_kevent_ops.keo_private, M_TEMP);
           return error;
   }

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