* Example client_subscription_loop.c: Async functions used in callbacks
Async functions have to be used in callbacks else the error message "Cannot run EventLoop from the run method itself" occurs under Windows 10 with Microsoft Visual Studio 17 2022.
* Example client_subscription_loop.c: Async functions used in callbacks
Compile error "Unused variable" removed
This commit drops the 'ua_' prefix and changes the public includes
to the form `#include <open62541/server.h>` instead of the old
`#include <ua_server.h>`
Make use of EXIT_SUCCESS and EXIT_FAILURE from stdlib.h.
The previous approach of returning a value from UA_StatusCode
was often broken as an exit code can (portably) only be between 0 and 125.
This commit adds asynchronous services to open62541 on client side
* Asynchronous service (highlevel read/write) are available through the API that is defined in
ua_client_highlevel_async.h
* Besides the services, the connection procedure is asynchronous as well.
* A client Application that uses the asynchronous API
adds requests by calling an asynchronous service (e.g., UA_Client_sendAsyncReadRequest(), UA_Client_sendAsyncBrowseRequest() )
checks for response with UA_Client_run_iterate() repeatedly
and processes the responses with user-defined callbacks
Julius Pfrommer