``` OpenJDK: 巴拿马 ```

``` OpenJDK: 巴拿马 ```
OpenJDK: Panama

原始链接: https://openjdk.org/projects/panama/

Project Panama 旨在显著改善 Java 与非 Java API 的交互，特别是那些在 C 编程中常用的 API。这是一项多方面的努力，引入了诸如直接调用本机函数、无需复制即可访问本机数据以及 Java 虚拟机 (JVM) 内新的数据布局等功能。关键组件包括 `jextract`——一个用于从本机头文件自动生成 Java 绑定的工具——以及对外部内存访问和函数调用的支持。Panama 还探索了针对本机代码交互的 JVM 优化，以及改进的库管理。 Panama 由 Hotspot 团队开发，作为一个孵化器运作，其组件最终将被纳入 JDK。积极的开发重点是外部支持和向量支持，一个遗留仓库现在被认为是不活跃的。最终，Panama 旨在弥合 Java 与更广泛的本机库世界之间的差距，从而提高性能和互操作性。

## OpenJDK Panama：改进Java的外部函数接口最近的Hacker News讨论集中在OpenJDK的Panama项目，特别是其在外部函数接口（FFI）方面的进展。这旨在改进Java与非Java代码的交互，为长期存在的Java本地接口（JNI）提供替代方案。用户强调了Vector API（目前处于孵化阶段）提升性能的潜力，尤其是在数据密集型任务中，目前Kotlin Notebooks等替代方案表现不足。虽然受到赞扬，但一些人批评Java“追赶”其他语言几十年来的功能，并将C#/.NET视为该领域的领导者。对话还涉及Java创新的步伐，一些人认为这是一种渐进式的改进，而不是突破性的创新。另一些人则为Java谨慎的方法辩护，更喜欢改进而不是快速采用新功能。许多评论员指出最近的进步，例如垃圾收集改进（ZGC），作为持续开发的证据。最终，这场讨论凸显了关于在像Java这样成熟的语言中，什么构成“创新”的争论。

原文

We are improving and enriching the connections between the Java virtual machine and well-defined but “foreign” (non-Java) APIs, including many interfaces commonly used by C programmers.

To this end, Project Panama will include most or all of these components:

native function calling from JVM
native data access from JVM or inside JVM heap
new data layouts in JVM heap
native metadata definition for JVM
header file API extraction tools (jextract)
native library management APIs
native-oriented interpreter and runtime “hooks”
class and method resolution “hooks”
native-oriented JIT optimizations
tooling or wrapper interposition for safety
exploratory work with difficult-to-integrate native libraries

Community

This Project is sponsored by the Hotspot Group.

Mailing lists & News
Design documents
JEPs
Talks

Repository organization

Project Panama is designed to incubate a series of components for eventual inclusion in the JDK, via curated merge. Project Panama features are being actively developed in the following repositories:

Panama foreign support, which adds support for foreign memory access, as well as for foreign function calls;
Panama vector support, which adds vectorization support in Java through JVM intriniscs; and
jextract, a tool which mechanically generate Java bindings from native library headers.

The legacy Panama repository is also available here, although we do not expect to carry out further work there; as such this repository should not be used (and in the future we might make this more explicit by marking the legacy repository as read-only).