On Tue, 14 Jan 2025 12:29:11 GMT, David Holmes <dhol...@openjdk.org> wrote:
> > So, as we foresee the adoption of the FFM API in the JDK internals, we will > > use such a mechanism for system calls like `fopen`, `socket`, and the like. > > See #22307 for example. > > Sorry I still don't see where you do the actual native call and read errno. > Just to be clear you have to read errno/last-error immediately after the > native call. You can't for example, return to Java see the call failed and > then make a second native call to retrieve errno. I believe the segment handling works as it should now. The segment is now allocated from a platform-thread-local cache. This means we do not have to pin. On the other hand, we will not reuse segments in the unlikely event of a virtual thread unmount during the call. Here is an example of such a system method handle: https://github.com/openjdk/jdk/pull/22307/files#diff-e5ba9b4d94ed42c635e449212e33bc65dc4a823e4187e197f7d39be516eee430R117 ------------- PR Comment: https://git.openjdk.org/jdk/pull/22391#issuecomment-2593297984
