Howard Chu authored 9 years ago and Quanah Gibson-Mount committed 9 years ago

Prevent spurious contextCSN generation
and ignore consumers when we have no contextCSN yet.
But make sure to propagate valid contextCSN updates to
accesslog/syncprov for delta consumers.

Howard Chu authored 9 years ago and Quanah Gibson-Mount committed 9 years ago

Windows mutexes are recursive so the trylock test will succeed
even though the mutex is already locked. Just compare be pointers.

No effect on current code.

...early enough that txn state is left unchanged.

Move the check to the end of txn startup.  Catches env
breakage which happens while the new txn waits for a lock.

* Add MDB_TXN_FINISHED, MDB_TXN_HAS_CHILD, MDB_TXN_BLOCKED.
* Clear mt_numdbs in writers, for TXN_DBI_EXIST() to catch.
  We already do in readers.

Side effects:
* Clean txn up a bit even before freeing it.
* Tweak DEBUG output at txn end. Add DEBUG after commit(writer).

MDB_DBI_CHANGED(,MAIN_DBI) is never true.

mt_env is always set.
Commit(mt_child) resets mt_child, so parent need not.

So far just to help aligning mdb.master and mdb.RE.
We'll make it an option later.

Leonid Yuriev authored 9 years ago and Hallvard Furuseth committed 9 years ago

The rest of 9a80a8a8
plus commit a937740a.

mdb_xcursor_init1(): md_pad is only used when MDB_DUPFIXED.
mdb_page_split():    Copy mp_pad too. Used by mdb_page_list().

More fallout from 4d02c741.

Taken from mdb_txn_begin(,,MDB_NOMETASYNC, MDB_NOSYNC,,)
without adding those two flags yet, to align with mdb.master:
Part of 54516639 (Renumber...)
+ 8adee946 (Fix per-txn...).

Leonid Yuriev authored 10 years ago and Hallvard Furuseth committed 9 years ago

commit 9a8eb956 (mdb_txn_renew0)
plus b2ab9910 (reader allocation)
from mdb.master.