Thread Safety

You can call both asynchronous (async) and synchronous (sync) APIs without any special precautions.

All distinct objects are not thread-safe. To access shared client and/or endpoint objects, construct them with a strand-wrapped executor for the underlying layer’s argument. The async_* member functions of client and endpoint will dispatch to the executor. As a result of the strand’s effect, your asynchronous processes will be serialized.

The following synchronous member functions are accessed directly. Therefore, you need to introduce locks or explicitly dispatch to the executor.