asmhatreandClaude Sonnet 5.5
ecceaa8b32
jextract-25 early-access build (25-jextract+2-4) on JDK 25.0.5+8 against SQLite 3.45.1: 25 functions and 13 constants generated into 4 committed files (the whole header would be 83 files), a small Db wrapper, the four arena kinds used wrongly on purpose, ADDRESS vs C_POINTER zero-length vs unbounded segments and the SIGSEGV from getString on a NULL pointer, sqlite3_open out-parameter, return codes to exceptions, a sqlite3_exec upcall and the VM exit when it throws, the JDK 25 native-access warning and --illegal-native-access=deny, library loading failures, and a JMH benchmark of FFM vs hand-written JNI vs plain Java (indicative only: shared 2-CPU machine). Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b6Kg9RWSTJzyz6KP9X
74 lines
2.1 KiB
Java
74 lines
2.1 KiB
Java
// Generated by jextract
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package demo.sqlite;
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import java.lang.invoke.*;
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import java.lang.foreign.*;
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import java.nio.ByteOrder;
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import java.util.*;
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import java.util.function.*;
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import java.util.stream.*;
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import static java.lang.foreign.ValueLayout.*;
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import static java.lang.foreign.MemoryLayout.PathElement.*;
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/**
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* {@snippet lang=c :
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* int (*callback)(void *, int, char **, char **)
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* }
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*/
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public final class sqlite3_exec$callback {
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private sqlite3_exec$callback() {
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// Should not be called directly
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}
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/**
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* The function pointer signature, expressed as a functional interface
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*/
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public interface Function {
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int apply(MemorySegment _x0, int _x1, MemorySegment _x2, MemorySegment _x3);
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}
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private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
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sqlite3_h.C_INT,
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sqlite3_h.C_POINTER,
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sqlite3_h.C_INT,
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sqlite3_h.C_POINTER,
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sqlite3_h.C_POINTER
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);
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/**
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* The descriptor of this function pointer
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*/
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public static FunctionDescriptor descriptor() {
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return $DESC;
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}
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private static final MethodHandle UP$MH = sqlite3_h.upcallHandle(sqlite3_exec$callback.Function.class, "apply", $DESC);
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/**
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* Allocates a new upcall stub, whose implementation is defined by {@code fi}.
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* The lifetime of the returned segment is managed by {@code arena}
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*/
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public static MemorySegment allocate(sqlite3_exec$callback.Function fi, Arena arena) {
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return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
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}
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private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);
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/**
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* Invoke the upcall stub {@code funcPtr}, with given parameters
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*/
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public static int invoke(MemorySegment funcPtr, MemorySegment _x0, int _x1, MemorySegment _x2, MemorySegment _x3) {
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try {
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return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2, _x3);
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} catch (Error | RuntimeException ex) {
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throw ex;
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} catch (Throwable ex$) {
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throw new AssertionError("should not reach here", ex$);
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}
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}
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}
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