1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
6 * All rights reserved.
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 unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef	_LINUXKPI_LINUX_SPINLOCK_H_
30#define	_LINUXKPI_LINUX_SPINLOCK_H_
31
32#include "los_typedef.h"
33#include "los_spinlock.h"
34
35#ifdef __cplusplus
36#if __cplusplus
37extern "C" {
38#endif /* __cplusplus */
39#endif /* __cplusplus */
40
41typedef struct Spinlock spinlock_t;
42
43#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_INITIALIZER(x)
44
45#define SPIN_MACRO_START do {
46#define SPIN_MACRO_END   } while (0)
47
48#define SPIN_EMPTY_STATEMENT SPIN_MACRO_START SPIN_MACRO_END
49
50#define SPIN_UNUSED_PARAM(_type_, _name_) SPIN_MACRO_START      \
51    _type_ __tmp1 = (_name_);                                     \
52    _type_ __tmp2 = __tmp1;                                       \
53    __tmp1 = __tmp2;                                              \
54SPIN_MACRO_END
55
56#define spin_lock_bh(lock)               \
57SPIN_MACRO_START;                         \
58SPIN_UNUSED_PARAM(spinlock_t *, lock);    \
59SPIN_MACRO_END
60
61#define spin_unlock_bh(lock)             \
62SPIN_MACRO_START;                         \
63SPIN_UNUSED_PARAM(spinlock_t *, lock);    \
64SPIN_MACRO_END
65
66#ifdef LOSCFG_KERNEL_SMP
67#define spin_lock_init(lock) do {LOS_SpinInit(lock);} while (0)
68#define spin_lock(lock) do {LOS_SpinLock(lock);} while (0)
69#define spin_unlock(lock) do {LOS_SpinUnlock(lock);} while (0)
70
71#define spin_lock_irqsave(lock, flags)  do {LOS_SpinLockSave(lock, (UINT32 *)&flags);} while (0)
72#define spin_unlock_irqrestore(lock, flags)  do {LOS_SpinUnlockRestore(lock, (UINT32)flags);} while (0)
73#else
74
75#define spin_lock_init(lock)             \
76SPIN_MACRO_START;                         \
77SPIN_UNUSED_PARAM(spinlock_t *, lock);    \
78SPIN_MACRO_END
79
80#define spin_lock(lock) do {(void)(lock);LOS_TaskLock();} while (0)
81#define spin_unlock(lock) do {(void)(lock);LOS_TaskUnlock();} while (0)
82
83#define spin_lock_irqsave(lock, flags)  do {flags = LOS_IntLock();spin_lock(lock);} while (0)
84#define spin_unlock_irqrestore(lock, flags)  do {spin_unlock(lock);LOS_IntRestore(flags);} while (0)
85#endif
86
87#ifdef __cplusplus
88#if __cplusplus
89}
90#endif /* __cplusplus */
91#endif /* __cplusplus */
92
93#endif /* _LINUXKPI_LINUX_SPINLOCK_H_ */
94