Improve epoll error handling.

The main change is to remove sockets from epoll if there are no
requested events, which happens when a socket is considered closed
(due to an error or otherwise). This prevents a busy loop when a socket
is an error condition where it will constantly be signaled, but not
deleted by higher level code.

Other related changes:
* Set DE_CLOSE on errors regardless of whether the socket is readable or
  writable.
* Don't set DE_ACCEPT on errors.
* Handle getsockopt(SO_ERROR) errors.
* In IsDescriptorClosed:
  * Retry recv on EINTR.
  * Treat ECONNABORTED and EPIPE as errors.

Original patch contributed by andrey.semashev@gmail.com.

Bug: webrtc:11124
Change-Id: I67f33213efc1418b1ffc8f4867f606b7f8dc4ece
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/235863
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35300}
1 file changed
tree: 7282b2cb9ead23ac9c52c4012dae61f1f5841e3c
  1. api/
  2. audio/
  3. build_overrides/
  4. call/
  5. common_audio/
  6. common_video/
  7. data/
  8. docs/
  9. examples/
  10. g3doc/
  11. logging/
  12. media/
  13. modules/
  14. net/
  15. p2p/
  16. pc/
  17. resources/
  18. rtc_base/
  19. rtc_tools/
  20. sdk/
  21. stats/
  22. system_wrappers/
  23. test/
  24. tools_webrtc/
  25. video/
  26. .clang-format
  27. .git-blame-ignore-revs
  28. .gitignore
  29. .gn
  30. .vpython
  31. .vpython3
  32. AUTHORS
  33. BUILD.gn
  34. CODE_OF_CONDUCT.md
  35. codereview.settings
  36. DEPS
  37. DIR_METADATA
  38. ENG_REVIEW_OWNERS
  39. g3doc.lua
  40. LICENSE
  41. license_template.txt
  42. native-api.md
  43. OWNERS
  44. PATENTS
  45. PRESUBMIT.py
  46. presubmit_test.py
  47. presubmit_test_mocks.py
  48. pylintrc
  49. README.chromium
  50. README.md
  51. WATCHLISTS
  52. webrtc.gni
  53. webrtc_lib_link_test.cc
  54. whitespace.txt
README.md

WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.

Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.

The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others.

Development

See here for instructions on how to get started developing with the native code.

Authoritative list of directories that contain the native API header files.

More info