As we advance, converting older JDK code to use the relatively new FFM API requires system calls that can provide `errno` and the likes to explicitly allocate a MemorySegment to capture potential error states. This can lead to negative performance implications if not designed carefully and also introduces unnecessary code complexity.
Hence, this PR proposes adding a JDK internal method handle adapter that can be used to handle system calls with `errno`, `GetLastError`, and `WSAGetLastError`. It relies on an efficient carrier-thread-local cache of memory regions to allide allocations. ------------- Commit messages: - Use stable values - Merge branch 'master' into errno-util3b - Add hashCode/equals to record to improve startup time - Revert change to ArenaImpl - Merge master - Merge master - Add test for woven allocation - Merge branch 'master' into errno-util3 - Use lazy initialization of method handles - Clean up visibility - ... and 29 more: https://git.openjdk.org/jdk/compare/1501a5e4...04dc6d3e Changes: https://git.openjdk.org/jdk/pull/25043/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25043&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8347408 Stats: 818 lines in 9 files changed: 805 ins; 0 del; 13 mod Patch: https://git.openjdk.org/jdk/pull/25043.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25043/head:pull/25043 PR: https://git.openjdk.org/jdk/pull/25043
