regress/sys/kern/callout1/test_callout1.c

   1 /*      $NetBSD: test_callout1.c,v 1.2 2008/04/22 12:04:22 ad Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Andrew Doran.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: test_callout1.c,v 1.2 2008/04/22 12:04:22 ad Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/systm.h>
  38 #include <sys/proc.h>
  39 #include <sys/kthread.h>
  40 #include <sys/kernel.h>
  41 #include <sys/callout.h>
  42
  43 int     testcall(struct lwp *, void *, register_t *);
  44
  45 void    test_callout(void *);
  46 void    test_softint(void *);
  47
  48 kmutex_t        test_mutex;
  49 kcondvar_t      test_cv;
  50 int             test_done;
  51 void            *test_sih;
  52 callout_t       test_ch;
  53
  54 void
  55 test_callout(void *cookie)
  56 {
  57         int s;
  58
  59         /* Trigger soft interrupt. */
  60         s = splhigh();
  61         softint_schedule(test_sih);
  62         splx(s);
  63
  64         mutex_enter(&test_mutex);
  65         test_done = 1;
  66         cv_broadcast(&test_cv);
  67         mutex_exit(&test_mutex);
  68 }
  69
  70 void
  71 test_softint(void *cookie)
  72 {
  73
  74         printf("l_ncsw = %d\n", (int)curlwp->l_ncsw);
  75         callout_halt(&test_ch, NULL);
  76         printf("l_ncsw = %d\n", (int)curlwp->l_ncsw);
  77 }
  78
  79 int
  80 testcall(struct lwp *l, void *uap, register_t *retval)
  81 {
  82
  83         printf("test: initializing\n");
  84
  85         mutex_init(&test_mutex, MUTEX_DEFAULT, IPL_NONE);
  86         cv_init(&test_cv, "testcv");
  87         test_sih = softint_establish(SOFTINT_MPSAFE | SOFTINT_SERIAL,
  88             test_softint, NULL);
  89         callout_init(&test_ch, CALLOUT_MPSAFE);
  90         callout_setfunc(&test_ch, test_callout, NULL);
  91
  92         printf("test: firing\n");
  93         callout_schedule(&test_ch, hz / 10);
  94
  95         printf("test: waiting\n");
  96         mutex_enter(&test_mutex);
  97         while (!test_done) {
  98                 cv_wait(&test_cv, &test_mutex);
  99         }
 100         mutex_exit(&test_mutex);
 101
 102         printf("test: finished\n");
 103
 104         callout_destroy(&test_ch);
 105         softint_disestablish(test_sih);
 106         mutex_destroy(&test_mutex);
 107         cv_destroy(&test_cv);
 108
 109         return 0;
 110 }