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mdbx: fix/rework cache-line alignment.

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This commit is contained in:
Leo Yuriev
2018-03-22 20:34:09 +03:00
parent 6a074cb85a
commit 61a2c56784
4 changed files with 47 additions and 43 deletions
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9
src/mdbx.c
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@@ -2618,6 +2618,12 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
return MDBX_PANIC;
}
STATIC_ASSERT(sizeof(MDBX_reader) == MDBX_CACHELINE_SIZE);
STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_numreaders) % MDBX_CACHELINE_SIZE ==
0);
STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_readers) % MDBX_CACHELINE_SIZE ==
0);
pgno_t upper_pgno = 0;
if (flags & MDBX_TXN_RDONLY) {
txn->mt_flags = MDBX_TXN_RDONLY;
@@ -2673,9 +2679,6 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
}
}
STATIC_ASSERT(sizeof(MDBX_reader) == MDBX_CACHELINE_SIZE);
STATIC_ASSERT(
offsetof(MDBX_lockinfo, mti_readers) % MDBX_CACHELINE_SIZE == 0);
r = &env->me_lck->mti_readers[slot];
/* Claim the reader slot, carefully since other code
* uses the reader table un-mutexed: First reset the