tree d7fa59505187443087b8912e9b964378391b5354
parent 2de5327bfac4c9bcde7a07960d6ae344b13075b2
author msta <msta@google.com> 1784674329 +1000
committer gn-scoped@luci-project-accounts.iam.gserviceaccount.com <gn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1784699500 -0700

Make EvalContext have interior mutability.

This significantly simplifies the API to use EvalContext, and means that
we can get rid of several unsafe APIs.

We still use UnsafeCell internally for EvalContext, but since we removed
the sync + send traits from EvalContext, EvalContext objects are now
guarunteed by the compiler to be accessed single-threaded, so we don't need to
worry about UnsafeCell actually being unsafe.

Bug: 528225104
Change-Id: I397b6f108728267d33cf5d000ed6c9f66a6a6964
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/24220
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Commit-Queue: Matt Stark <msta@google.com>