Function create_lock

Stability

2 - provisional

Creates a simple lock object with two methods, acquire and acquire_immediately.

The acquire method takes a callback and returns the callback's return value.

The acquire_immediately method will try to acquire the lock immediately, returning an object with both .was_acquired immediate and .result promise.

This implementation is prone to deadlocks across multiple locks.

See the monolithic create_multi_lock as a potential mitigation to deadlocks.