sys/rump/librump/rumpuser/rumpuser_int.h

   1 /*      $NetBSD: rumpuser_int.h,v 1.3 2009/01/07 22:50:08 pooka Exp $   */
   2
   3 /*
   4  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <rump/rumpuser.h>
  29
  30 extern kernel_lockfn rumpuser__klock;
  31 extern kernel_unlockfn rumpuser__kunlock;
  32 extern int rumpuser__wantthreads;
  33
  34 #define KLOCK_WRAP(a)                                                   \
  35 do {                                                                    \
  36         int nlocks;                                                     \
  37         rumpuser__kunlock(0, &nlocks);                                  \
  38         a;                                                              \
  39         rumpuser__klock(nlocks);                                        \
  40 } while (/*CONSTCOND*/0)
  41
  42 #define DOCALL(rvtype, call)                                            \
  43         rvtype rv;                                                      \
  44         rv = call;                                                      \
  45         if (rv == -1)                                                   \
  46                 *error = errno;                                         \
  47         else                                                            \
  48                 *error = 0;                                             \
  49         return rv;
  50
  51 #define DOCALL_KLOCK(rvtype, call)                                      \
  52         rvtype rv;                                                      \
  53         int nlocks;                                                     \
  54         rumpuser__kunlock(0, &nlocks);                                  \
  55         rv = call;                                                      \
  56         rumpuser__klock(nlocks);                                        \
  57         if (rv == -1)                                                   \
  58                 *error = errno;                                         \
  59         else                                                            \
  60                 *error = 0;                                             \
  61         return rv;