commit f241c88aa36fcf65a46dc79a433ed19d8dc498b3
author pigweed-integration-roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com> Fri Jul 16 03:27:14 2021 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> Fri Jul 16 03:33:46 2021 +0000
tree c337531a0ad1f17eb700f17ac624c778d163ee8a
parent 68a132c6cb373bddf298854c398e6e2e4949648e

[roll third_party/pigweed] pw_ring_buffer: Add late-reader/drain attach

Changes the default behavior of the ring buffer and multisink such that
late-attach of a Reader or Drain now places the object at the index of
the oldest entry in the buffer.

For Readers, the oldest entry corresponds to the slowest reader present.
If no readers are present, the Reader is placed at the write head. For
Drains, a lagging Reader is always present, so new Drains will always
point to the oldest valid entry in the buffer.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/53344

third_party/pigweed Rolled-Commits: 3eb97d4c0673aa1..099f716e17f2bb3
Roller-URL: https://ci.chromium.org/b/8841583511446873968
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8841583511446873968
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I852d4f7fb9575288e20ed9a424f4d497ef92e731
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/53384
Reviewed-by: 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>