[componentmgr] RealmState refactor.

- Instead of representing the list of "deleting" child realms as a
`Vec<Arc<Realm>>`, do the following:
  * Store a map of all child realms
  * Store a map of live child realms.
- Add methods for getting child realms and transitioning them between
live/deleting/deleted.
- Make `Realm.state` and RealmState's fields private.
- Turn RealmState into Option<RealmState> (through RealmStateHolder) and
remove Option from `decl` and `child_realms`. This means that the realm's
is either resolved or not; until it's resolved, none of the mutable
state is accessible.

Change-Id: I7c5e0a5881f41b03790e1ab02ba52b634c57c2a8
11 files changed
tree: 31f197e728eaa4d05546b2af1d0654eda7e6d5e3
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. garnet/
  7. peridot/
  8. products/
  9. scripts/
  10. sdk/
  11. src/
  12. third_party/
  13. tools/
  14. zircon/
  15. .clang-format
  16. .clang-tidy
  17. .dir-locals.el
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. .style.yapf
  22. AUTHORS
  23. BUILD.gn
  24. CODE_OF_CONDUCT.md
  25. CONTRIBUTING.md
  26. LICENSE
  27. OWNERS
  28. PATENTS
  29. README.md
  30. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See fuchsia.dev.