tree 3110538a43d11bf3d3deba45449cda6ad712e90c
parent 5d9fd47c3640bf190b405c31f21593aa48f02cd9
author David 'Digit' Turner <digit@google.com> 1780577124 +0200
committer gn-scoped@luci-project-accounts.iam.gserviceaccount.com <gn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1782390272 -0700

Use BuilderRecord::waiting_map_

Replace four pointer sets with a simple { ptr -> bool[4] }
map. These are used to track the dependents that are
waiting for a given record to change state.

This is a small preparation step for another CL that will
change how state change notifications are propagated during
resolution.

Benchmarking shows -1.5% PEAK RAM usage, `gn gen` performance
is unaffected.

Change-Id: I233c4515ce12a98a201461b8823f5af760bde41b
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/23140
Commit-Queue: David Turner <digit@google.com>
Reviewed-by: Takuto Ikuta <tikuta@google.com>