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mdbx: fix without-LCK (exclusive + readonly) mode.

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This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2022-06-03 22:39:11 +03:00
parent f6db64bea1
commit e795fe7c3e
1 changed files with 11 additions and 9 deletions

20
src/core.c

@ -20144,15 +20144,17 @@ __cold static int fetch_envinfo_ex(const MDBX_env *env, const MDBX_txn *txn,
arg->mi_self_latter_reader_txnid = arg->mi_latter_reader_txnid =
arg->mi_recent_txnid;
for (unsigned i = 0; i < arg->mi_numreaders; ++i) {
const uint32_t pid =
atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease);
if (pid) {
const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid);
if (arg->mi_latter_reader_txnid > txnid)
arg->mi_latter_reader_txnid = txnid;
if (pid == env->me_pid && arg->mi_self_latter_reader_txnid > txnid)
arg->mi_self_latter_reader_txnid = txnid;
if (env->me_lck_mmap.lck) {
for (unsigned i = 0; i < arg->mi_numreaders; ++i) {
const uint32_t pid =
atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease);
if (pid) {
const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid);
if (arg->mi_latter_reader_txnid > txnid)
arg->mi_latter_reader_txnid = txnid;
if (pid == env->me_pid && arg->mi_self_latter_reader_txnid > txnid)
arg->mi_self_latter_reader_txnid = txnid;
}
}
}