bracket package:unliftio

Allocate and clean up a resource safely. For more information on motivation and usage of this function, see base's bracket. This function has two differences from the one in base. The first, and more obvious, is that it works on any MonadUnliftIO instance, not just IO. The more subtle difference is that this function will use uninterruptible masking for its cleanup handler. This is a subtle distinction, but at a high level, means that resource cleanup has more guarantees to complete. This comes at the cost that an incorrectly written cleanup function cannot be interrupted. For more information, please see https://github.com/fpco/safe-exceptions/issues/3.

Same as bracket, but only perform the cleanup if an exception is thrown.

A variant of bracketOnError where the return value from the first computation is not required.

Same as bracket, but does not pass the acquired resource to cleanup and use functions. For more information, see base's bracket_.