Group: Lolaf Ringos

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Facade over the JDK-internal Unsafe operations ringos needs - field offsets, array bases and scales, direct buffer cleaning, L1 cache line size - which reports whether it is available instead of throwing when it is not. Add ...

The RingBuffer API and the idling strategies it waits on: RingBufferFactory, the four access types, IdleStrategy, FastThreadLocal, and the skeleton the implementations extend. Compile against this and add ringos-lib-impl-all at ...

JDK-agnostic aggregator for the UnsafeOperations SPI: bundles every version-specific implementation and selects the right one at runtime. Depend on this single artifact instead of a specific unsafe-operations-impl-* module.

RingBuffer implementation built on jdk.internal.misc.Unsafe, selected on JDK 12 and later when java.base/jdk.internal.misc is opened to it. Depend on ringos-lib-impl-all rather than on this directly.

The handful of Linux system calls that make a thread behave predictably - timer slack, which bounds how late a short park returns, and the scheduling policy - reached through JNA. Every call is a no-op off Linux, or on Linux when the ...

Runtime-agnostic aggregator for the RingBuffer implementations: bundles the Unsafe, Java 11 Unsafe and MethodHandle builders and selects one at runtime (Unsafe when java.base/jdk.internal.misc is opened, MethodHandle otherwise). ...

RingBuffer implementation built on VarHandle. The fallback that runs on every supported JDK and needs no --add-opens, selected only when no Unsafe implementation is eligible.

RingBuffer implementation built on jdk.internal.misc.Unsafe for JDK 11, the one release whose Unsafe has getObject rather than getReference. Depend on ringos-lib-impl-all rather than on this directly.

UnsafeOperations implementation for JDK 11 to 14, where jdk.internal.misc.Unsafe has getObject rather than getReference and no invokeCleaner, so a direct buffer is released through a MethodHandle on the JDK 9 Cleaner. Depend on ...

UnsafeOperations implementation for JDK 15 to 24, using getReference and the Unsafe invokeCleaner that both arrived by then. Depend on ringos-unsafe-operations-impl-all rather than on this directly.

Java 25 UnsafeOperations implementation, compiled to Java 25 bytecode.

Always-loadable SPI provider (compiled to the parent's Java 11 bytecode default) that selects the Java 25 UnsafeOperations implementation. This is the artifact to depend on for Java 25+ support; it pulls the implementation in ...

Lock-free MPMC/SPSC ring buffers, idling strategies and a hashed wheel timer for low-latency Java.

Hashed wheel timer built on the ringos MPSC ring buffer.

Java 25+ UnsafeOperations, split so the two concerns can compile to different class-file versions: the "impl" module holds the Java 25 implementation (Java 25 bytecode), and the "provider" module holds the SPI provider compiled to ...