This module is an AnyEvent user, you need to make sure that you use and
run a supported event loop.
This module implements a thin wrapper around the BDB module: Each BDB
request that could block and doesnt get passed a callback will normally
block all coroutines. after loading this module, this will no longer be
the case (it provides a suitable sync prepare callback).
It will also register an AnyEvent watcher as soon as AnyEvent chooses an
The AnyEvent watcher can be disabled by executing undef
$Coro::BDB::WATCHER. Please notify the author of when and why you think
this was necessary.
This module does not export anything (unlike Coro::AIO), as BDB already
supports leaving out the callback. (Unfortunately, it ties a C context
to each coroutine executing such a callback, so in the future, it might
export more efficient wrappers).