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rumpuser_int.h revision 1.4 
      1 /*	$NetBSD: rumpuser_int.h,v 1.4 2010/11/15 15:23:32 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 <stdlib.h>
     29 
     30 #include <rump/rumpuser.h>
     31 
     32 extern kernel_lockfn rumpuser__klock;
     33 extern kernel_unlockfn rumpuser__kunlock;
     34 extern int rumpuser__wantthreads;
     35 
     36 #define seterror(value) do { if (error) *error = value;} while (/*CONSTCOND*/0)
     37 
     38 #define KLOCK_WRAP(a)							\
     39 do {									\
     40 	int nlocks;							\
     41 	rumpuser__kunlock(0, &nlocks, NULL);				\
     42 	a;								\
     43 	rumpuser__klock(nlocks, NULL);					\
     44 } while (/*CONSTCOND*/0)
     45 
     46 #define DOCALL(rvtype, call)						\
     47 {									\
     48 	rvtype rv;							\
     49 	rv = call;							\
     50 	if (rv == -1)							\
     51 		seterror(errno);					\
     52 	else								\
     53 		seterror(0);						\
     54 	return rv;							\
     55 }
     56 
     57 #define DOCALL_KLOCK(rvtype, call)					\
     58 {									\
     59 	rvtype rv;							\
     60 	int nlocks;							\
     61 	rumpuser__kunlock(0, &nlocks, NULL);				\
     62 	rv = call;							\
     63 	rumpuser__klock(nlocks, NULL);					\
     64 	if (rv == -1)							\
     65 		seterror(errno);					\
     66 	else								\
     67 		seterror(0);						\
     68 	return rv;							\
     69 }
     70