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rumpuser_int.h revision 1.5 
      1 /*	$NetBSD: rumpuser_int.h,v 1.5 2013/04/27 14:59:08 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 <stdlib.h>
     29 
     30 #include <rump/rumpuser.h>
     31 
     32 extern rump_unschedulefn rumpuser__unschedule;
     33 extern rump_reschedulefn rumpuser__reschedule;
     34 
     35 #define seterror(value) do { if (error) *error = value;} while (/*CONSTCOND*/0)
     36 
     37 #define KLOCK_WRAP(a)							\
     38 do {									\
     39 	int nlocks;							\
     40 	rumpuser__unschedule(0, &nlocks, NULL);				\
     41 	a;								\
     42 	rumpuser__reschedule(nlocks, NULL);				\
     43 } while (/*CONSTCOND*/0)
     44 
     45 #define DOCALL(rvtype, call)						\
     46 {									\
     47 	rvtype rv;							\
     48 	rv = call;							\
     49 	if (rv == -1)							\
     50 		seterror(errno);					\
     51 	else								\
     52 		seterror(0);						\
     53 	return rv;							\
     54 }
     55 
     56 #define DOCALL_KLOCK(rvtype, call)					\
     57 {									\
     58 	rvtype rv;							\
     59 	int nlocks;							\
     60 	rumpuser__unschedule(0, &nlocks, NULL);				\
     61 	rv = call;							\
     62 	rumpuser__reschedule(nlocks, NULL);				\
     63 	if (rv == -1)							\
     64 		seterror(errno);					\
     65 	else								\
     66 		seterror(0);						\
     67 	return rv;							\
     68 }
     69 
     70 void rumpuser__thrinit(void);
     71