RFR: Structured concurrency support for scoped locals

[Andrew Haley]

Structured concurrency support for scoped locals

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Commits:
 - 7429ba03: Structured concurrency support for scoped locals

Changes: https://git.openjdk.java.net/loom/pull/2/files
 Webrev: https://webrevs.openjdk.java.net/loom/2/webrev.00
  Stats: 72 lines in 5 files changed: 51 ins; 11 del; 10 mod
  Patch: https://git.openjdk.java.net/loom/pull/2.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/2/head:pull/2

PR: https://git.openjdk.java.net/loom/pull/2