* No longer expose WT_SESSION into Erlang at all as WT's model is to
maintain one WT_SESSION per-thread and we don't know anything about
threads in Erlang.
* async_nif worker threads don't pull both mutexes on every loop
when processing requests, only one
* async_nif provides a worker_id (int, 0 - MAX_WORKERS) within the
work block scope which we use to find our per-worker WT_SESSIONs
* async_nif maintained a number of globals which I'm moving into
the NIF's priv_data so that on upgrade/reload we have a fighting
chance to "Do the Right Thing(TM)".
* NIF Upgrades/Reloads started to plumb this in.
* Use a khash to manage the cache of URI->WT_CURSORs per WT_SESSION.
* Added start/stop positions into truncate call to allow for truncating
sub-ranges data.
* Lots of other details I'm sure I've forgotten and more left undone.
Search for "TODO:" or try to compile to see what's left, and then
there is a need for a lot more tests given all this new complexity.
Since 1.3.0 folded the session sync function into the session checkpoint
function, the wterl:sync/(2,3) functions are now renamed
wterl:checkpoint/(1,2). See
http://source.wiredtiger.com/1.3.0/upgrading.html for details.
The wterl:session_get function was fetching a value using a cursor, then
closing the cursor, and then trying to use the fetched value to create the
return binary. According to the WiredTiger documentation, this is a no-no
-- a value is good only until the next operation on the cursor used to
fetch it. We've been seeing occasional segmentation violations in the
memcpy for the fetched value, and this might explain it.
Change cursor_{next,prev} to return {ok, Key, Value}. Add
cursor_{next,prev}_{key,value} functions to allow cursor movement
followed by fetch of either key or value. Add fold_keys function. Add
unit tests for these changes. Also specify "inorder" on the unit test
generator functions, since the tests they specified are intended to be
run that way.
Add app, supervisor, and worker to open and cache the database
connection. Revert to using binaries for WT config in order to allow
wterl callers to use proplists for configuration. Change {error,
not_found} to not_found return values from wterl.
Add support for cursor.{next,prev,search,search_near,reset}.
Change table_create to no longer pass back the table name, WiredTiger's
model is that you pass in the object name each time (and the current
model means we can't drop the table before we run the tests).
Upgrade to the WiredTiger 1.0 release, there's a bug where static
libraries aren't created correctly, for now create shared libraries
for wterl.
A number of changes:
* Added exported functions to close connections and sessions.
* Added exported functions to create and drop tables. Currently not
happy with the shape of these functions, though, as they treat
tables in Erlang just as strings, and they force users of sessions
to have to pass both sessions and tables into get/put/delete
operations. It might be better to take a table identifier as part of
the session creation function and store that identifier with the
session resource.
* Added implementations for key-value get, put, and delete.
* Added very minimal unit tests for the changes above.
