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/*-
* 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_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 */
#define WT_CACHE_LINE_ALIGNMENT_VERIFY(session, a) \
WT_ASSERT(session, \
WT_PTRDIFF(&(a)[1], &(a)[0]) >= WT_CACHE_LINE_ALIGNMENT && \
WT_PTRDIFF(&(a)[1], &(a)[0]) % WT_CACHE_LINE_ALIGNMENT == 0)
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