FreeBSD/Linux Kernel Cross Reference
sys/compat/mach/mach_clock.c

     /*      $NetBSD: mach_clock.c,v 1.19 2008/04/28 20:23:44 martin Exp $ */
     
     /*-
      * Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Emmanuel Dreyfus
      *
     * 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: mach_clock.c,v 1.19 2008/04/28 20:23:44 martin Exp $");
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/signal.h>
    #include <sys/proc.h>
    #include <sys/time.h>
    
    #include <compat/mach/mach_types.h>
    #include <compat/mach/mach_message.h>
    #include <compat/mach/mach_port.h>
    #include <compat/mach/mach_clock.h>
    #include <compat/mach/mach_services.h>
    #include <compat/mach/mach_syscallargs.h>
    
    int
    mach_sys_clock_sleep_trap(struct lwp *l, const struct mach_sys_clock_sleep_trap_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(mach_clock_port_t) clock_name;
                    syscallarg(mach_sleep_type_t) sleep_type;
                    syscallarg(int) sleep_sec;
                    syscallarg(int) sleep_nsec;
                    syscallarg(mach_timespec_t *) wakeup_time;
            } */
            struct timespec mts, cts, tts;
            mach_timespec_t mcts;
            int dontcare;
            int error;
            int ticks;
    
            mts.tv_sec = SCARG(uap, sleep_sec);
            mts.tv_nsec = SCARG(uap, sleep_nsec);
    
            if (SCARG(uap, sleep_type) == MACH_TIME_ABSOLUTE) {
                    nanotime(&cts);
                    timespecsub(&mts, &cts, &tts);
            } else {
                    tts.tv_sec = mts.tv_sec;
                    tts.tv_nsec = mts.tv_nsec;
            }
    
            ticks = tts.tv_sec * hz;
            ticks += (tts.tv_nsec * hz) / 100000000L;
    
            tsleep(&dontcare, PZERO|PCATCH, "sleep", ticks);
    
            if (SCARG(uap, wakeup_time) != NULL) {
                    nanotime(&cts);
                    mcts.tv_sec = cts.tv_sec;
                    mcts.tv_nsec = cts.tv_nsec;
                    error = copyout(&mcts, SCARG(uap, wakeup_time), sizeof(mcts));
                    if (error != 0)
                            return error;
            }
    
            return 0;
    }
    
    int
    mach_sys_timebase_info(struct lwp *l, const struct mach_sys_timebase_info_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(mach_timebase_info_t) info;
            } */
           int error;
           struct mach_timebase_info info;
   
           /* XXX This is probably bus speed, fill it accurately */
           info.numer = 4000000000UL;
           info.denom = 75189611UL;
   
           if ((error = copyout(&info, (void *)SCARG(uap, info),
               sizeof(info))) != 0)
                   return error;
   
           return 0;
   }
   
   
   
   int
   mach_clock_get_time(struct mach_trap_args *args)
   {
           mach_clock_get_time_request_t *req = args->smsg;
           mach_clock_get_time_reply_t *rep = args->rmsg;
           size_t *msglen = args->rsize;
           struct timeval tv;
   
           microtime(&tv);
   
           *msglen = sizeof(*rep);
           mach_set_header(rep, req, *msglen);
   
           rep->rep_cur_time.tv_sec = tv.tv_sec;
           rep->rep_cur_time.tv_nsec = tv.tv_usec * 1000;
   
           mach_set_trailer(rep, *msglen);
   
           return 0;
   }

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