> This patch contains the implementation of the foreign linker & memory API JEP > for Java 22. The initial patch is composed of commits brought over directly > from the [panama-foreign repo](https://github.com/openjdk/panama-foreign). > The main changes found in this patch come from the following PRs: > > 1. https://github.com/openjdk/panama-foreign/pull/836 Where previous > iterations supported converting Java strings to and from native strings in > the UTF-8 encoding, we've extended the supported encoding to all the > encodings found in the `java.nio.charset.StandardCharsets` class. > 2. https://github.com/openjdk/panama-foreign/pull/838 We dropped the > `MemoryLayout::sequenceLayout` factory method which inferred the size of the > sequence to be `Long.MAX_VALUE`, as this led to confusion among clients. A > client is now required to explicitly specify the sequence size. > 3. https://github.com/openjdk/panama-foreign/pull/839 A new API was added: > `Linker::canonicalLayouts`, which exposes a map containing the > platform-specific mappings of common C type names to memory layouts. > 4. https://github.com/openjdk/panama-foreign/pull/840 Memory access > varhandles, as well as byte offset and slice handles derived from memory > layouts, now feature an additional 'base offset' coordinate that is added to > the offset computed by the handle. This allows composing these handles with > other offset computation strategies that may not be based on the same memory > layout. This addresses use-cases where clients are working with 'dynamic' > layouts, whose size might not be known statically, such as variable length > arrays, or variable size matrices. > 5. https://github.com/openjdk/panama-foreign/pull/841 Remove this now > redundant API. Clients can simply use the difference between the base address > of two memory segments. > 6. https://github.com/openjdk/panama-foreign/pull/845 Disambiguate uses of > `SegmentAllocator::allocateArray`, by renaming methods that both allocate + > initialize memory segments to `allocateFrom`. (see the original PR for the > problematic case) > 7. https://github.com/openjdk/panama-foreign/pull/846 Improve the > documentation for variadic functions. > 8. https://github.com/openjdk/panama-foreign/pull/849 Several test fixes to > make sure the `jdk_foreign` tests can pass on 32-bit machines, taking > linux-x86 as a test bed. > 9. https://github.com/openjdk/panama-foreign/pull/850 Make the linker API > required. The `Linker::nativeLinker` method is not longer allowed to throw an > `UnsupportedOperationException` on ...
Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision: add test for unmodifiable canonical layouts map ------------- Changes: - all: https://git.openjdk.org/jdk/pull/15103/files - new: https://git.openjdk.org/jdk/pull/15103/files/fd0512f8..efc5ef4a Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=15103&range=06 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15103&range=05-06 Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/15103.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15103/head:pull/15103 PR: https://git.openjdk.org/jdk/pull/15103
