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
|
/*-
* Copyright (c) 2014-2015 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
/*
* Publish a value to a shared location. All previous stores must complete
* before the value is made public.
*/
#define WT_PUBLISH(v, val) do { \
WT_WRITE_BARRIER(); \
(v) = (val); \
} while (0)
/*
* Read a shared location and guarantee that subsequent reads do not see any
* earlier state.
*/
#define WT_ORDERED_READ(v, val) do { \
(v) = (val); \
WT_READ_BARRIER(); \
} while (0)
/*
* Atomic versions of the flag set/clear macros.
*/
#define F_ISSET_ATOMIC(p, mask) ((p)->flags_atomic & (uint8_t)(mask))
#define F_SET_ATOMIC(p, mask) do { \
uint8_t __orig; \
do { \
__orig = (p)->flags_atomic; \
} while (!__wt_atomic_cas8( \
&(p)->flags_atomic, __orig, __orig | (uint8_t)(mask))); \
} while (0)
#define F_CAS_ATOMIC(p, mask, ret) do { \
uint8_t __orig; \
ret = 0; \
do { \
__orig = (p)->flags_atomic; \
if ((__orig & (uint8_t)(mask)) != 0) { \
ret = EBUSY; \
break; \
} \
} while (!__wt_atomic_cas8( \
&(p)->flags_atomic, __orig, __orig | (uint8_t)(mask))); \
} while (0)
#define F_CLR_ATOMIC(p, mask) do { \
uint8_t __orig; \
do { \
__orig = (p)->flags_atomic; \
} while (!__wt_atomic_cas8( \
&(p)->flags_atomic, __orig, __orig & ~(uint8_t)(mask))); \
} while (0)
#define WT_CACHE_LINE_ALIGNMENT 64 /* Cache line alignment */
|
