This fixes subtle bugs with transaction inheritence. Since we were not
passing the inherited state to moved value, we were sometimes committing
transactions more than once.
Changelog-Fixed: Fix many nostrdb transaction related crashes
This is a potential fix for some of the crash reports that have been
streaming in. They all seem to be crashing within ndb_close_txn. I
suspect this means that the transactions are trying to get closed when
ndb is already closed. Closing Ndb will close the transactions
automatically, so it looks like we might be trying to close twice.
Since there may be situations where we close and re-open the database,
we need to make sure transactions fail when the database is not open.
Make NdbTxn an init?() constructor and check for ndb.closed. If it's
closed, then fail transaction construction.
This fixes crashes during high database activity when switching from
background to foreground and vice-versa.
Fixes: da2bdad18d ("nostrdb: close database when backgrounded")
This reverts commit da2bdad18d.
This commit was reverted because it was causing crashes (Occasional `EXC_BAD_ACCESS` errors when accessing database transactions), and because the push notification extension uses Ndb in a read-only manner, which means we no longer need these changes
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>
Otherwise iOS gets mad because we are holding onto a lockfile in a
shared container which is apparently not allowed.
Fixes: a1e6be214e ("Migrate NostrDB files to shared app group file container")
Many different parts of the codebase could be opening transactions when
somewhere higher in the heirarchy on the main thread might already have
an active transaction. This can lead to failed transaction opening which
is bad.
Instead of relying on passing down the transaction to subviews, lets
keep track of the active transactions in a thread-local dictionary. That
way whenever we create a new transaction we can inherit the one that is
already active in the current thread.
Inherited transactions don't end the query when they are garbage
collected, we still expect the first-opened query to do this.
