IgH EtherCAT Master  1.6.3
rt_locks.h
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1 /*****************************************************************************
2  *
3  * Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
4  *
5  * This file is part of the IgH EtherCAT Master.
6  *
7  * The IgH EtherCAT Master is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License version 2, as
9  * published by the Free Software Foundation.
10  *
11  * The IgH EtherCAT Master is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
14  * Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with the IgH EtherCAT Master; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  *
20  ****************************************************************************/
21 
27 /****************************************************************************/
28 
29 #ifndef __EC_LOCKS_H__
30 #define __EC_LOCKS_H__
31 
32 #include "globals.h"
33 #include <linux/version.h>
34 
35 #include <linux/semaphore.h>
36 
37 /****************************************************************************/
38 
39 #ifdef EC_USE_RTMUTEX
40 
41 #include <linux/rtmutex.h>
42 
43 typedef struct rt_mutex ec_lock_t;
44 
45 static inline void ec_lock_init(ec_lock_t *sem) { rt_mutex_init(sem); }
46 static inline void ec_lock_down(ec_lock_t *sem) { rt_mutex_lock(sem); }
47 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 34)
48 static inline int ec_lock_down_interruptible(ec_lock_t *sem) {
49  return rt_mutex_lock_interruptible(sem);
50 }
51 #else
52 static inline int ec_lock_down_interruptible(ec_lock_t *sem) {
53  return rt_mutex_lock_interruptible(sem, 1);
54 }
55 #endif
56 static inline void ec_lock_up(ec_lock_t *sem) { rt_mutex_unlock(sem); }
57 
58 #else
59 
60 typedef struct semaphore ec_lock_t;
61 
62 static inline void ec_lock_init(ec_lock_t *sem) { sema_init(sem, 1); }
63 static inline void ec_lock_down(ec_lock_t *sem) { down(sem); }
64 static inline int ec_lock_down_interruptible(ec_lock_t *sem) {
65  return down_interruptible(sem);
66 }
67 static inline void ec_lock_up(ec_lock_t *sem) { up(sem); }
68 
69 #endif
70 
71 /****************************************************************************/
72 
73 #endif
74 
75 /****************************************************************************/
globals.h
Global definitions and macros.