* Adds support for asio::cancel_after in connection::{async_exec, async_run}
* Adds cancel_after tests
* Adds an example on using asio::cancel_after
* Adds a discussion page on timeouts and the `cancel_if_unresponded` flag
close#226
* Adds support for terminal and partial cancellation to async_run.
* Makes basic_connection::cancel use per-operation cancellation under the hood.
* Fixes a number of race conditions during cancellation which could cause the cancellation to be ignored. This could happen if the cancellation is delivered while an async handler is pending execution.
* Deprecates operation::{resolve, connect, ssl_handshake, reconnection, health_check}, in favor of operation::run. Calling basic_connection::cancel with these values (excepting reconnection) is now equivalent to using operation::run.
* Fixes a problem in the health checker that caused ping timeouts to be reported as cancellations.
* Sanitizes how the parallel group computes its final error code.
* Simplifies the reader, writer and health checker to not care about connection cancellation. This is now the responsibility of the parallel group.
* Removes an unnecessary setup_cancellation action in the reader FSM.
* Adds documentation regarding per-operation cancellation to async_receive.
* Adds additional health checker tests.
* Adds async_run per-operation cancellation tests.
* Adds reader FSM cancellation tests.
* Makes test_conn_exec_retry tests more resilient.
* Removes leftovers in the UNIX and TLS reconnection tests. These were required due to race conditions that have already been fixed.
close#318close#319
- Removes cancellation support from async_run.
- Simplifies async operations.
- Removes async_run_lean.
- Remove support for implicit cancellation from health-checker.
- Reuses async_run parallel group for health-checker tasks.
- Moves the resolver from the runner to the connection.
- Moves the connector from the runner to the connection_base class.
- Moves the ssl handshaker to the connection_base class.
- Moves the health-check to the connection_base class.
- Simplifies cancel operations.
- Improvements in logging.
- Remove ssl handshaker.
- Removes run_op from runner and renames runner to resp3_handshaker.
