[ViewVC] Diff of: cvs/BDB/BDB.pm

Comparing BDB/BDB.pm (file contents):
Revision 1.36 by root, Sat May 10 20:23:06 2008 UTC vs.
Revision 1.37 by root, Mon Jul 7 14:28:53 2008 UTC

 =item BDB::set_sync_prepare $cb
 Sets a callback that is called whenever a request is created without an
 explicit callback. It has to return two code references. The first is used
-as the request callback, and the second is called to wait until the first
+as the request callback (it should save the return status), and the second
+is called to wait until the first callback has been called (it must set
+C<$!> to the return status).
+This mechanism can be used to include BDB into other event mechanisms,
+such as L<AnyEvent::BDB> or L<Coro::BDB>.
-callback has been called. The default implementation works like this:
+The default implementation works like this:
    sub {
       my $status;
       (
          sub { $status = $! },
          sub { BDB::poll while !defined $status; $! = $status },
       )
    }
+It simply blocks the process till the request has finished and then sets
+C<$!> to the return value. This means that if you don't use a callback,
+BDB will simply fall back to synchronous operations.
 =back
 =head3 STATISTICAL INFORMATION

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