Motivation:
As outlined in #1761, io_uring is a new async I/O facility on Linux.
This commit includes a second stab at adding this to SwiftNIO.
Modifications:
Added Uring Selector implementation.
Added liburing support shims.
Disabled one assert that trips during normal usage likely due to async nature of poll updates, for discussion
Added shared kernel sqpoll ring support (can be run with normal user privs in 5.13)
Support for both single shot polls (should work all the way back to 5.1 kernels, needs testing) and multishot streaming polls and modifications for polls (scheduled due in 5.13) for slightly better performance (and better impedance match to SwiftNIO usage)
Added extensive debug logs which can be enabled with -D compiler flags (should likely be removed when bringup and testing is complete)
Adjusted tests.
Added documentation.
Result:
Basic liburing support is in place.
Co-authored-by: Johannes Weiss <johannesweiss@apple.com>
Motivation:
Be able to run and test swift-nio on Android.
Modifications:
- Remove the custom ifaddrs and use the one from the Android NDK instead.
- Enable a bunch of conditionally-compiled code for Android.
- Add a handful of constants and other Android declarations.
- Cast some types because of mismatches specific to Android.
Result:
Most tests pass on Android AArch64 and ARMv7.
Co-authored-by: Cory Benfield <lukasa@apple.com>
Motivation:
cmsghdrs can be used to send an receive extra data on UDP packets.
For example ECN data.
Modifications:
Map in Linux and Darwin versions of cmsghdr macros as functions.
Create strctures for holding a received collection; parsing ecn
data from a received collection and building a collection suitable
for sending.
Result:
Functions to manipulate cmsghdr and data exist.
Motivation:
SwiftPM only generates fully usable clang modules for C modules if they
have umbrella headers. Therefore, adding a generated NIO.xcodeproj to
another Xcode project as a sub-project never worked.
To make a header an umbrella header you need to name them _exactly_ like
the module.
Modifications:
give each C module an umbrella header
Result:
generated NIO Xcode projects can be used as sub-projects.
Joakim Hassila