> Going forward, 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 to add a _JDK internal_ method handle adapter that > can be used to handle system calls with `errno`, `GetLastError`, and > `WSAGetLastError`. > > It currently relies on a thread-local cache of MemorySegments to allide > allocations. If, in the future, a more efficient thread-associated allocation > scheme becomes available, we could easily migrate to that one. > > Tested and passed tiers 1-3.
Per Minborg has updated the pull request incrementally with two additional commits since the last revision: - Clean up - Add VT pinning ------------- Changes: - all: https://git.openjdk.org/jdk/pull/22391/files - new: https://git.openjdk.org/jdk/pull/22391/files/124567cf..67a1deae Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=22391&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22391&range=01-02 Stats: 109 lines in 2 files changed: 92 ins; 0 del; 17 mod Patch: https://git.openjdk.org/jdk/pull/22391.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22391/head:pull/22391 PR: https://git.openjdk.org/jdk/pull/22391
