Subversion Repositories shark

Rev

Rev 3 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 1
/*
2
 * Project: S.Ha.R.K.
3
 *
4
 * Coordinators:
5
 *   Giorgio Buttazzo    <giorgio@sssup.it>
6
 *   Paolo Gai           <pj@gandalf.sssup.it>
7
 *
8
 * Authors     :
9
 *   Paolo Gai           <pj@gandalf.sssup.it>
10
 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
11
 *   Luca Abeni          <luca@gandalf.sssup.it>
12
 *   (see the web pages for full authors list)
13
 *
14
 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
15
 *
16
 * http://www.sssup.it
17
 * http://retis.sssup.it
18
 * http://shark.sssup.it
19
 */
20
 
21
 
22
/**
23
 ------------
80 pj 24
 CVS :        $Id: sem.h,v 1.2 2003-03-13 13:39:05 pj Exp $
2 pj 25
 
26
 File:        $File$
80 pj 27
 Revision:    $Revision: 1.2 $
28
 Last update: $Date: 2003-03-13 13:39:05 $
2 pj 29
 ------------
30
 
31
 This file contains the semaphoric primitives
32
 
33
 Title:
34
   HARTSEM (Hartik Semaphores)
35
 
36
 Resource Models Accepted:
37
   None
38
 
39
 Description:
40
   This module contains a semaphore library compatible with Posix, Plus
41
   an extension to permit post and wait with counters > 1
42
 
43
 Exceptions raised:
44
   None
45
 
46
 Restrictions & special features:
47
   - a function isBlocked is provided
48
   - the named semaphores are NOT implemented with a filesystem
49
   - the system supports up to _POSIX_SEM_NSEMS_MAX defined in limits.h
50
 
51
**/
52
 
53
/*
54
 * Copyright (C) 2000 Paolo Gai
55
 *
56
 * This program is free software; you can redistribute it and/or modify
57
 * it under the terms of the GNU General Public License as published by
58
 * the Free Software Foundation; either version 2 of the License, or
59
 * (at your option) any later version.
60
 *
61
 * This program is distributed in the hope that it will be useful,
62
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
63
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
64
 * GNU General Public License for more details.
65
 *
66
 * You should have received a copy of the GNU General Public License
67
 * along with this program; if not, write to the Free Software
68
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
69
 *
70
 */
71
 
72
#ifndef __MODULES_SEM_H__
73
#define __MODULES_SEM_H__
74
 
75
#include <kernel/types.h>
80 pj 76
#include "ll/sys/cdefs.h"
2 pj 77
 
80 pj 78
__BEGIN_DECLS
79
 
2 pj 80
#define SEM_FAILED NULL
81
typedef int sem_t;
82
 
83
/*+ This function must be inserted in the __hartik_register_levels__ +*/
84
void SEM_register_module(void);
85
 
86
int sem_close(sem_t *sem);
87
int sem_destroy(sem_t *sem);
88
int sem_getvalue(sem_t *sem, int *sval);
89
int sem_init(sem_t *sem, int pshared, unsigned int value);
90
sem_t *sem_open(const char *name, int oflag, ...);
91
int sem_post(sem_t *sem);
92
int sem_trywait(sem_t *sem);
93
int sem_unlink(const char *name);
94
int sem_wait(sem_t *sem);
95
 
96
 
97
 
98
int sem_xpost(sem_t *sem, int n);
99
int sem_xwait(sem_t *sem, int n, int wait);
100
 
101
 
102
int isBlocked(PID i);
103
 
80 pj 104
__END_DECLS
2 pj 105
#endif