84 lines
2.8 KiB
Java
84 lines
2.8 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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/**
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* A java implementation of a LWJGL compatible event queue.
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* @author elias_naur
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*/
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import java.nio.ByteBuffer;
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class EventQueue {
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private static final int QUEUE_SIZE = 200;
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private final int event_size;
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private final ByteBuffer queue;
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protected EventQueue(int event_size) {
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this.event_size = event_size;
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this.queue = ByteBuffer.allocate(QUEUE_SIZE*event_size);
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}
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protected synchronized void clearEvents() {
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queue.clear();
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}
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/**
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* Copy available events into the specified buffer.
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*/
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public synchronized void copyEvents(ByteBuffer dest) {
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queue.flip();
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int old_limit = queue.limit();
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if (dest.remaining() < queue.remaining())
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queue.limit(dest.remaining() + queue.position());
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dest.put(queue);
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queue.limit(old_limit);
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queue.compact();
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}
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/**
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* Put an event into the queue.
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* @return true if the event fitted into the queue, false otherwise
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*/
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public synchronized boolean putEvent(ByteBuffer event) {
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if (event.remaining() != event_size)
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throw new IllegalArgumentException("Internal error: event size " + event_size + " does not equal the given event size " + event.remaining());
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if (queue.remaining() >= event.remaining()) {
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queue.put(event);
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return true;
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} else
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return false;
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}
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}
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