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mdbx: fix safe64_reset() for platforms without atomic 64-bit compare-and-swap.

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This commit is contained in:
Leonid Yuriev 2021-07-04 17:24:47 +03:00
parent b66780633e
commit 39c5e66ed1
1 changed files with 7 additions and 5 deletions
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12
src/core.c
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@ -957,16 +957,18 @@ static __always_inline void safe64_reset(MDBX_atomic_uint64_t *p,
mo_Relaxed) /* atomically make >= SAFE64_INVALID_THRESHOLD */; mo_Relaxed) /* atomically make >= SAFE64_INVALID_THRESHOLD */;
atomic_add32(&p->low, 1) /* avoid ABA in safe64_reset_compare() */; atomic_add32(&p->low, 1) /* avoid ABA in safe64_reset_compare() */;
} else } else
#elif MDBX_64BIT_ATOMIC #endif /* !MDBX_64BIT_CAS */
/* atomically make value >= SAFE64_INVALID_THRESHOLD by 64-bit operation */ #if MDBX_64BIT_ATOMIC
atomic_store64(p, UINT64_MAX, /* atomically make value >= SAFE64_INVALID_THRESHOLD by 64-bit operation */
single_writer ? mo_AcquireRelease : mo_SequentialConsistency); atomic_store64(p, UINT64_MAX,
single_writer ? mo_AcquireRelease
: mo_SequentialConsistency);
#else #else
/* atomically make value >= SAFE64_INVALID_THRESHOLD by 32-bit operation */ /* atomically make value >= SAFE64_INVALID_THRESHOLD by 32-bit operation */
atomic_store32(&p->high, UINT32_MAX, atomic_store32(&p->high, UINT32_MAX,
single_writer ? mo_AcquireRelease : mo_SequentialConsistency); single_writer ? mo_AcquireRelease : mo_SequentialConsistency);
#endif /* MDBX_64BIT_ATOMIC */ #endif /* MDBX_64BIT_ATOMIC */
assert(p->weak >= SAFE64_INVALID_THRESHOLD); assert(p->weak >= SAFE64_INVALID_THRESHOLD);
mdbx_jitter4testing(true); mdbx_jitter4testing(true);
} }