xref: /illumos-gate/usr/src/lib/libfakekernel/common/sys/semaphore.h (revision 2c5ec7a875dcd76853e6618614e990f1e8cdd56d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 1993-1998 by Sun Microsystems, Inc.
24  * All rights reserved.
25  *
26  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
27  */
28 
29 #ifndef _SYS_SEMAPHORE_H
30 #define	_SYS_SEMAPHORE_H
31 
32 /*
33  * Public interface to semaphores.  See semaphore(9F) for details.
34  */
35 
36 #include <sys/synch.h>	/* lwp_sema_t */
37 
38 #ifdef	__cplusplus
39 extern "C" {
40 #endif
41 
42 typedef enum {
43 	SEMA_DEFAULT,
44 	SEMA_DRIVER
45 } ksema_type_t;
46 
47 typedef lwp_sema_t ksema_t;
48 
49 #define	SEMA_HELD(x)		(sema_held((x)))
50 
51 /*
52  * We're simulating the kernel mutex API here, and the
53  * user-level has a different signature, so rename.
54  */
55 
56 #define	sema_init	ksema_init
57 #define	sema_destroy	ksema_destroy
58 
59 extern	void	ksema_init(ksema_t *, uint32_t, char *, ksema_type_t, void *);
60 extern	void	ksema_destroy(ksema_t *);
61 
62 extern	void	sema_p(ksema_t *);
63 extern	int	sema_p_sig(ksema_t *);
64 extern	void	sema_v(ksema_t *);
65 extern	int	sema_tryp(ksema_t *);
66 extern	int	sema_held(ksema_t *);
67 
68 #ifdef	__cplusplus
69 }
70 #endif
71 
72 #endif	/* _SYS_SEMAPHORE_H */
73