tree e77bdbf80eaaacd9f1ea2e05d59630db14025254
parent 2f5ae70413d3a425e7f1f337ccf4d737b030be5a
author Wyatt Hepler <hepler@pigweed.infra.roller.google.com> 1674528722 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1674528722 +0000

[roll third_party/pigweed] pw_rpc: Add function for yielding the RPC lock in C++

Upcoming CLs will require threads to yield the RPC lock while waiting
for a different thread to finish executing an RPC callback.

- Add a config option for selecting how to yield (busy loop,
  pw::this_thread::sleep_for(), pw::this_thread::yield()).
- Add dependencies on pw_thread if backends are defined.
- Have the pw_rpc:disable_global_mutex config select the busy loop yield
  approach, since platforms with the mutex disabled either do not
  support threading or exclusively use RPC from one thread.
- Disable the RPC lock on a few platforms with no RTOS.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126751

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: cd4481c13b0fb36..8050957fa9ef835
Roller-URL: https://ci.chromium.org/b/8791123439305796273
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia19b3fb3586c116295f97407d55ff2c6c6c0b5d0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126834
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>