graal/21.0.0.2 : sdk/org.graalvm.nativeimage/org/graalvm/nativeimage/c/struct/CField.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
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 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package org.graalvm.nativeimage.c.struct;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import org.graalvm.word.LocationIdentity;
import org.graalvm.word.WordBase;

Denotes a method as a field access of a C struct.  If the method has a non-void return type, it is a get-method of the field. Calls of the method are replaced with a memory read. The possible signatures are FieldType getFieldName([IntType index], [LocationIdentity locationIdentity]); 
 If the method has the return type void, it is a set-method of the field. Calls of the method are replaced with a memory write. The possible signatures are void setFieldName([IntType index], FieldType value, [LocationIdentity locationIdentity]); 

The receiver is the pointer to the struct that is accessed, i.e., the base address of the memory
access.
 The FieldType must be the Java-equivalent of the C type used in the C struct. The additional annotations AllowNarrowingCast or AllowWideningCast can be used to relax the strict type requirements. 
 The optional parameter index (always the first parameter when it is present) denotes an index, i.e., the receiver is treated as an array of the struct. The type must be a primitive integer type or a word type. Address arithmetic is used to scale the index with the size of the struct. 
 The optional parameter locationIdentity specifies the LocationIdentity to be used for the memory access. Two memory accesses with two different location identities are guaranteed to not alias. The parameter cannot be used together with the UniqueLocationIdentity annotation, which is another way of providing a location identity for the memory access. 

Multiple accessor methods, with different signatures according to the rules of allowed
signatures, are allowed for a single field.
Since: 19.0/**
 * Denotes a method as a field access of a {@link CStruct C struct}.
 * <p>
 * If the method has a non-void return type, it is a get-method of the field. Calls of the method
 * are replaced with a memory read. The possible signatures are
 * {@code FieldType getFieldName([IntType index], [LocationIdentity locationIdentity]);}
 * <p>
 * If the method has the return type void, it is a set-method of the field. Calls of the method are
 * replaced with a memory write. The possible signatures are
 * {@code void setFieldName([IntType index], FieldType value, [LocationIdentity locationIdentity]);}
 * <p>
 * The receiver is the pointer to the struct that is accessed, i.e., the base address of the memory
 * access.
 * <p>
 * The {@code FieldType} must be the Java-equivalent of the C type used in the C struct. The
 * additional annotations {@link AllowNarrowingCast} or {@link AllowWideningCast} can be used to
 * relax the strict type requirements.
 * <p>
 * The optional parameter {@code index} (always the first parameter when it is present) denotes an
 * index, i.e., the receiver is treated as an array of the struct. The type must be a primitive
 * integer type or a {@link WordBase word type}. Address arithmetic is used to scale the index with
 * the size of the struct.
 * <p>
 * The optional parameter {@code locationIdentity} specifies the {@link LocationIdentity} to be used
 * for the memory access. Two memory accesses with two different location identities are guaranteed
 * to not alias. The parameter cannot be used together with the {@link UniqueLocationIdentity}
 * annotation, which is another way of providing a location identity for the memory access.
 * <p>
 * Multiple accessor methods, with different signatures according to the rules of allowed
 * signatures, are allowed for a single field.
 *
 * @since 19.0
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface CField {

    Specifies the field name inside the C struct. If no name is provided, the method name is used as the field name. A possible "get" or "set" prefix of the method name is removed. 
Since: 19.0/**
     * Specifies the field name inside the {@link CStruct C struct}. If no name is provided, the
     * method name is used as the field name. A possible "get" or "set" prefix of the method name is
     * removed.
     *
     * @since 19.0
     */
    String value() default "";
}
/

graal/ 21.0.0.2/ sdk/org.graalvm.nativeimage/org/graalvm/nativeimage/c/struct/CField.java
