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mdbx: рефакторинг txn_renew() транзакций с вычленением txn_basal_start().

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Леонид Юрьев (Leonid Yuriev)
2025-01-15 00:49:30 +03:00
parent 314b8ce1f0
commit 2c3b36da64
3 changed files with 81 additions and 62 deletions
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41
src/txn-basal.c
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@@ -89,6 +89,47 @@ __cold void txn_basal_destroy(MDBX_txn *txn) {
osal_free(txn);
}
int txn_basal_start(MDBX_txn *txn, unsigned flags) {
MDBX_env *const env = txn->env;
txn->wr.troika = meta_tap(env);
const meta_ptr_t head = meta_recent(env, &txn->wr.troika);
uint64_t timestamp = 0;
while ("workaround for https://libmdbx.dqdkfa.ru/dead-github/issues/269") {
int err = coherency_fetch_head(txn, head, &timestamp);
if (likely(err == MDBX_SUCCESS))
break;
if (unlikely(err != MDBX_RESULT_TRUE))
return err;
}
eASSERT(env, meta_txnid(head.ptr_v) == txn->txnid);
txn->txnid = safe64_txnid_next(txn->txnid);
if (unlikely(txn->txnid > MAX_TXNID)) {
ERROR("txnid overflow, raise %d", MDBX_TXN_FULL);
return MDBX_TXN_FULL;
}
tASSERT(txn, txn->dbs[FREE_DBI].flags == MDBX_INTEGERKEY);
tASSERT(txn, check_table_flags(txn->dbs[MAIN_DBI].flags));
txn->flags = flags;
txn->nested = nullptr;
txn->wr.loose_pages = nullptr;
txn->wr.loose_count = 0;
#if MDBX_ENABLE_REFUND
txn->wr.loose_refund_wl = 0;
#endif /* MDBX_ENABLE_REFUND */
MDBX_PNL_SETSIZE(txn->wr.retired_pages, 0);
txn->wr.spilled.list = nullptr;
txn->wr.spilled.least_removed = 0;
txn->wr.gc.time_acc = 0;
txn->wr.gc.last_reclaimed = 0;
if (txn->wr.gc.retxl)
MDBX_PNL_SETSIZE(txn->wr.gc.retxl, 0);
env->txn = txn;
return MDBX_SUCCESS;
}
int txn_basal_end(MDBX_txn *txn, unsigned mode) {
MDBX_env *const env = txn->env;
tASSERT(txn, (txn->flags & (MDBX_TXN_FINISHED | txn_may_have_cursors)) == 0 && txn->owner);