Since functions implemented by `gevent_util.h` are used also by the
new experimental `Aio` module, the file holding these functions needs
to be renamed to something more meaningful.
Implement the minimal stuff for making a unary call with the new
experimental gRPC Python implementation for Asyncio, called Aio.
What has been added:
- Minimal iomgr code for performing the required network and timer
calls.
- Minimal Cython code implementing the channel, call and the callback
context.
- Minimal Python code that mimics the synchronous implementation but
designed to be asynchronous.
Testing considerations:
Tests have to be executed using the `GRPC_ENABLE_FORK_SUPPORT=0`
environment variable for skipping the fork handles installed by
the core library. This is due to the usage of a syncrhonous server
used as a fixture executed in another process.
Co-authored-by: Manuel Miranda <manuel.miranda@skyscanner.net>
Co-authored-by: Mariano Anaya <mariano.anaya@skyscanner.net>
Co-authored-by: Zhanghui Mao <zhanghui.mao@skyscanner.net>
Co-authored-by: Lidi Zheng <lidiz@google.com>
In https://github.com/grpc/grpc/issues/19910, it was pointed out that
raising an exception from a Future callback would cause the channel spin
thread to terminate. If there are outstanding events on the channel,
this will cause calls to Channel.close() to block indefinitely.
This commit ensures that the channel spin thread does not die. Instead,
exceptions will be logged at ERROR level.
Richard Belleville
Pau Freixes
Muxi Yan
Esun Kim
Mark D. Roth
Lidi Zheng
Neeraj Kashyap
Juanli Shen