org.lwjgl.system.jemalloc.MallocMessageCallback Maven / Gradle / Ivy

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A general purpose malloc implementation that emphasizes fragmentation avoidance and scalable concurrency support.

There is a newer version: 3.3.4

/*
 * Copyright LWJGL. All rights reserved.
 * License terms: https://www.lwjgl.org/license
 * MACHINE GENERATED FILE, DO NOT EDIT
 */
package org.lwjgl.system.jemalloc;

import javax.annotation.*;

import org.lwjgl.system.*;

import static org.lwjgl.system.MemoryUtil.*;

/**
 * Instances of this class may be passed to the {@link JEmalloc#je_malloc_usable_size malloc_usable_size} method.
 * 
 * Type
 * 
 * 
 * void (*) (
 *     void *cbopaque,
 *     char const *s
 * )
 */
public abstract class MallocMessageCallback extends Callback implements MallocMessageCallbackI {

    /**
     * Creates a {@code MallocMessageCallback} instance from the specified function pointer.
     *
     * @return the new {@code MallocMessageCallback}
     */
    public static MallocMessageCallback create(long functionPointer) {
        MallocMessageCallbackI instance = Callback.get(functionPointer);
        return instance instanceof MallocMessageCallback
            ? (MallocMessageCallback)instance
            : new Container(functionPointer, instance);
    }

    /** Like {@link #create(long) create}, but returns {@code null} if {@code functionPointer} is {@code NULL}. */
    @Nullable
    public static MallocMessageCallback createSafe(long functionPointer) {
        return functionPointer == NULL ? null : create(functionPointer);
    }

    /** Creates a {@code MallocMessageCallback} instance that delegates to the specified {@code MallocMessageCallbackI} instance. */
    public static MallocMessageCallback create(MallocMessageCallbackI instance) {
        return instance instanceof MallocMessageCallback
            ? (MallocMessageCallback)instance
            : new Container(instance.address(), instance);
    }

    protected MallocMessageCallback() {
        super(SIGNATURE);
    }

    private MallocMessageCallback(long functionPointer) {
        super(functionPointer);
    }

    /**
     * Converts the specified {@link MallocMessageCallback} arguments to a String.
     *
     * This method may only be used inside a MallocMessageCallback invocation.
     *
     * @param s the MallocMessageCallback {@code s} argument
     *
     * @return the message as a String
     */
    public static String getMessage(long s) {
        return memASCII(s);
    }

    private static final class Container extends MallocMessageCallback {

        private final MallocMessageCallbackI delegate;

        Container(long functionPointer, MallocMessageCallbackI delegate) {
            super(functionPointer);
            this.delegate = delegate;
        }

        @Override
        public void invoke(long cbopaque, long s) {
            delegate.invoke(cbopaque, s);
        }

    }

}