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fix bug in loadUninitializedPage(). It was passing INVALID_XID into the transaction table, which is not allowed

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This commit is contained in:
Sears Russell 2010-02-18 19:04:39 +00:00
parent 4e100479d1
commit 6454d55a42
1 changed files with 6 additions and 1 deletions
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7
src/stasis/bufferManager/bufferHash.c
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@ -309,7 +309,12 @@ static Page * bhLoadPageImpl_helper(stasis_buffer_manager_t* bm, int xid, const
stasis_page_loaded(ret, type);
*stasis_page_type_ptr(ret) = UNINITIALIZED_PAGE;
// XXX revisit LSN handling in loadUnititializedPage().
lsn_t xid_lsn = stasis_transaction_table_get(stasis_runtime_transaction_table(), xid)->prevLSN;
lsn_t xid_lsn;
if(xid == INVALID_XID) {
xid_lsn = INVALID_LSN;
} else {
xid_lsn = stasis_transaction_table_get(stasis_runtime_transaction_table(), xid)->prevLSN;
}
lsn_t log_lsn = ((stasis_log_t*)stasis_log())->next_available_lsn(stasis_log());
// If this transaction has a prevLSN, prefer it. Otherwise, set the LSN to nextAvailableLSN - 1
ret->LSN = *stasis_page_lsn_ptr(ret) = xid_lsn == INVALID_LSN ? (log_lsn - 1) : xid_lsn;