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Java language bindings for Gst, generated with Java-GI
There is a newer version: 0.11.2
/* Java-GI - Java language bindings for GObject-Introspection-based libraries
 * Copyright (C) 2022-2023 Jan-Willem Harmannij
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see .
 */

 /* This file has been generated with Java-GI.
  * Do not edit this file directly!
  * Visit https://jwharm.github.io/java-gi for more information.
  */

package org.freedesktop.gstreamer.gst;

import io.github.jwharm.javagi.gobject.*;
import io.github.jwharm.javagi.gobject.types.*;
import io.github.jwharm.javagi.base.*;
import io.github.jwharm.javagi.interop.*;
import java.lang.foreign.*;
import java.lang.invoke.*;
import org.jetbrains.annotations.*;

/**
 * The {@link AtomicQueue} object implements a queue that can be used from multiple
 * threads without performing any blocking operations.
 */
public class AtomicQueue extends ManagedInstance {
    
    static {
        Gst.javagi$ensureInitialized();
    }
    
    /**
     * Get the GType of the GstAtomicQueue class.
     * @return the GType
     */
    public static org.gnome.glib.Type getType() {
        return Interop.getType("gst_atomic_queue_get_type");
    }
    
    /**
     * Create a AtomicQueue proxy instance for the provided memory address.
     * @param address the memory address of the native object
     */
    public AtomicQueue(MemorySegment address) {
        super(address);
        MemoryCleaner.setFreeFunc(this.handle(), "gst_atomic_queue_unref");
    }
    
    /**
     * Create a new atomic queue instance. {@code initial_size} will be rounded up to the
     * nearest power of 2 and used as the initial size of the queue.
     * @param initialSize initial queue size
     */
    public AtomicQueue(int initialSize) {
        super(constructNew(initialSize));
    }
    
    /**
     * Helper function for the {@code gst_atomic_queue_new} constructor
     */
    private static MemorySegment constructNew(int initialSize) {
        FunctionDescriptor _fdesc = FunctionDescriptor.of(ValueLayout.ADDRESS, ValueLayout.JAVA_INT);
        MemorySegment _result;
        try {
            _result = (MemorySegment) Interop.downcallHandle("gst_atomic_queue_new", _fdesc, false).invokeExact(initialSize);
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
        return _result;
    }
    
    /**
     * Get the amount of items in the queue.
     * @return the number of elements in the queue.
     */
    public int length() {
        FunctionDescriptor _fdesc = FunctionDescriptor.of(ValueLayout.JAVA_INT, ValueLayout.ADDRESS);
        int _result;
        try {
            _result = (int) Interop.downcallHandle("gst_atomic_queue_length", _fdesc, false).invokeExact(handle());
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
        return _result;
    }
    
    /**
     * Peek the head element of the queue without removing it from the queue.
     * @return the head element of {@code queue} or
     * {@code null} when the queue is empty.
     */
    public @Nullable java.lang.foreign.MemorySegment peek() {
        FunctionDescriptor _fdesc = FunctionDescriptor.of(ValueLayout.ADDRESS, ValueLayout.ADDRESS);
        MemorySegment _result;
        try {
            _result = (MemorySegment) Interop.downcallHandle("gst_atomic_queue_peek", _fdesc, false).invokeExact(handle());
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
        return _result;
    }
    
    /**
     * Get the head element of the queue.
     * @return the head element of {@code queue} or {@code null} when
     * the queue is empty.
     */
    public @Nullable java.lang.foreign.MemorySegment pop() {
        FunctionDescriptor _fdesc = FunctionDescriptor.of(ValueLayout.ADDRESS, ValueLayout.ADDRESS);
        MemorySegment _result;
        try {
            _result = (MemorySegment) Interop.downcallHandle("gst_atomic_queue_pop", _fdesc, false).invokeExact(handle());
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
        return _result;
    }
    
    /**
     * Append {@code data} to the tail of the queue.
     * @param data the data
     */
    public void push(@Nullable java.lang.foreign.MemorySegment data) {
        FunctionDescriptor _fdesc = FunctionDescriptor.ofVoid(ValueLayout.ADDRESS, ValueLayout.ADDRESS);
        try {
            Interop.downcallHandle("gst_atomic_queue_push", _fdesc, false).invokeExact(handle(),
                    (MemorySegment) (data == null ? MemorySegment.NULL : data));
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
    }
    
    /**
     * Increase the refcount of {@code queue}.
     */
    public void ref() {
        FunctionDescriptor _fdesc = FunctionDescriptor.ofVoid(ValueLayout.ADDRESS);
        try {
            Interop.downcallHandle("gst_atomic_queue_ref", _fdesc, false).invokeExact(handle());
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
    }
    
    /**
     * Unref {@code queue} and free the memory when the refcount reaches 0.
     */
    public void unref() {
        FunctionDescriptor _fdesc = FunctionDescriptor.ofVoid(ValueLayout.ADDRESS);
        try {
            Interop.downcallHandle("gst_atomic_queue_unref", _fdesc, false).invokeExact(handle());
        } catch (Throwable _err) {
            throw new AssertionError("Unexpected exception occurred: ", _err);
        }
    }
}