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      1 /*-
      2  * Copyright (c) 2005 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Frank van der Linden.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef _LINUX_SIGEVENT_H
     31 #define _LINUX_SIGEVENT_H
     32 
     33 #define LINUX_SIGEV_SIGNAL    0       /* notify via signal */
     34 #define LINUX_SIGEV_NONE      1       /* other notification: meaningless */
     35 #define LINUX_SIGEV_THREAD    2       /* deliver via thread creation */
     36 #define LINUX_SIGEV_THREAD_ID 4       /* deliver to thread */
     37 
     38 #define LINUX_SIGEV_MAX  64
     39 #ifndef LINUX_SIGEV_PAD
     40 #define LINUX_SIGEV_PAD  ((LINUX_SIGEV_MAX -				\
     41 			   (sizeof(sigval_t) + (sizeof(int) * 2))) /	\
     42 			  sizeof(int))
     43 #endif
     44 
     45 typedef struct linux_sigevent {
     46 	sigval_t sigev_value;		/* sizeof(pointer) */
     47 	int sigev_signo;
     48 	int sigev_notify;
     49 	/* guaranteed to have natural pointer alignment */
     50 	union {
     51 		int pad[LINUX_SIGEV_PAD];
     52 		int tid;
     53 		struct {
     54 			void (*func)(sigval_t);
     55 			void *attr;
     56 		} _sigev_thread;
     57 	} _sigev_un;
     58 } linux_sigevent_t;
     59 
     60 int	linux_to_native_sigevent(struct sigevent *,
     61 	    const struct linux_sigevent *);
     62 int	linux_sigevent_copyin(const void *, void *, size_t);
     63 
     64 #endif /* _LINUX_SIGEVENT_H */
     65