1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/* Copyright (C) 2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _LOWLEVELUMTX_H
#define _LOWLEVELUMTX_H 1
#include <kernel-features.h>
#include <sysdep.h>
#include <atomic.h>
/* from <sys/umtx.h> */
/* op code for _umtx_op */
#define UMTX_OP_WAIT 2
#define UMTX_OP_WAKE 3
#define UMTX_OP_WAIT_UINT 11
#define UMTX_OP_WAIT_UINT_PRIVATE 15
#define UMTX_OP_WAKE_PRIVATE 16
int __syscall__umtx_op(void *, int, long, void*, void*);
libc_hidden_proto (__syscall__umtx_op)
#define UMTX_SYSCALL __syscall__umtx_op
/*
*
we provide set of functions
lll_umtx_{int,long}_{wait,wake}_{private,shared}
*
*/
/*******************************************************/
#define lll_umtx_int_wait_private(addr, val, timeout) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAIT_UINT_PRIVATE, \
(long)((unsigned int)(val)), \
NULL, \
timeout); \
})
#define lll_umtx_int_wait_shared(addr, val, timeout) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAIT_UINT, \
(long)((unsigned int)(val)), \
NULL, \
timeout); \
})
#define lll_umtx_long_wait_private(addr, val, timeout) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAIT, /* only autoshare available */ \
val, \
NULL, \
timeout); \
})
#define lll_umtx_long_wait_shared(addr, val, timeout) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAIT, /* only autoshare available */ \
val, \
NULL, \
timeout); \
})
/*******************************************************/
#define lll_umtx_int_wake_private(addr, num) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAKE_PRIVATE, \
num, \
NULL, \
NULL); \
})
#define lll_umtx_int_wake_shared(addr, num) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAKE, \
num, \
NULL, \
NULL); \
})
#define lll_umtx_long_wake_private(addr, num) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAKE_PRIVATE, \
num, \
NULL, \
NULL); \
})
#define lll_umtx_long_wake_shared(addr, num) \
({ \
UMTX_SYSCALL( \
addr, \
UMTX_OP_WAKE, \
num, \
NULL, \
NULL); \
})
/*******************************************************/
#endif /* _LOWLEVELUMTX_H */
|
