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394 lines
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<title>CacheUtil (LWJGL API)</title>
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<div class="subTitle">org.lwjgl.util.mapped</div>
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<h2 title="Class CacheUtil" class="title">Class CacheUtil</h2>
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<li>org.lwjgl.util.mapped.CacheUtil</li>
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<br>
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<pre>public final class <span class="strong">CacheUtil</span>
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extends java.lang.Object</pre>
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<div class="block">This class provides utility methods for allocating cache-line-aligned
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NIO buffers. The CPU cache line size is detected using a micro-benchmark
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that exploits the performation degredation that occurs when different
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threads write to different locations of the same cache line. The detection
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should be reasonably robust on both the server and client VM, but there
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are a few system properties that can be used to tune it.</div>
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<dl><dt><span class="strong">Author:</span></dt>
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<dd>Spasi</dd></dl>
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<h3>Method Summary</h3>
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<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static java.nio.ByteBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createByteBuffer(int)">createByteBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned bytebuffer with the specified size.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static java.nio.CharBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createCharBuffer(int)">createCharBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned charbuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static java.nio.DoubleBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createDoubleBuffer(int)">createDoubleBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned doublebuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static java.nio.FloatBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createFloatBuffer(int)">createFloatBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned floatbuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static java.nio.IntBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createIntBuffer(int)">createIntBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned intbuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static java.nio.LongBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createLongBuffer(int)">createLongBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned longbuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static <a href="../../../../org/lwjgl/PointerBuffer.html" title="class in org.lwjgl">PointerBuffer</a></code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createPointerBuffer(int)">createPointerBuffer</a></strong>(int size)</code>
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<div class="block">Construct a cache-line-aligned PointerBuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static java.nio.ShortBuffer</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#createShortBuffer(int)">createShortBuffer</a></strong>(int size)</code>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned shortbuffer with the specified number
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of elements.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><strong><a href="../../../../org/lwjgl/util/mapped/CacheUtil.html#getCacheLineSize()">getCacheLineSize</a></strong>()</code>
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<div class="block">Returns the CPU cache line size, in number of bytes.</div>
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</td>
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</tr>
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</table>
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</a>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<div class="details">
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<h3>Method Detail</h3>
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<a name="getCacheLineSize()">
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<h4>getCacheLineSize</h4>
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<pre>public static int getCacheLineSize()</pre>
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<div class="block">Returns the CPU cache line size, in number of bytes.</div>
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<dl><dt><span class="strong">Returns:</span></dt><dd>the cache line size</dd></dl>
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<h4>createByteBuffer</h4>
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<pre>public static java.nio.ByteBuffer createByteBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned bytebuffer with the specified size.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in bytes</dd>
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<dt><span class="strong">Returns:</span></dt><dd>a ByteBuffer</dd></dl>
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<a name="createShortBuffer(int)">
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<h4>createShortBuffer</h4>
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<pre>public static java.nio.ShortBuffer createShortBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned shortbuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in shorts</dd>
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<dt><span class="strong">Returns:</span></dt><dd>a ShortBuffer</dd></dl>
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<h4>createCharBuffer</h4>
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<pre>public static java.nio.CharBuffer createCharBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned charbuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in chars</dd>
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<dt><span class="strong">Returns:</span></dt><dd>an CharBuffer</dd></dl>
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<a name="createIntBuffer(int)">
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<h4>createIntBuffer</h4>
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<pre>public static java.nio.IntBuffer createIntBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned intbuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in ints</dd>
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<dt><span class="strong">Returns:</span></dt><dd>an IntBuffer</dd></dl>
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<a name="createLongBuffer(int)">
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<h4>createLongBuffer</h4>
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<pre>public static java.nio.LongBuffer createLongBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned longbuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in longs</dd>
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<dt><span class="strong">Returns:</span></dt><dd>an LongBuffer</dd></dl>
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</li>
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</ul>
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<a name="createFloatBuffer(int)">
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<h4>createFloatBuffer</h4>
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<pre>public static java.nio.FloatBuffer createFloatBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned floatbuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in floats</dd>
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<dt><span class="strong">Returns:</span></dt><dd>a FloatBuffer</dd></dl>
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</li>
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</ul>
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<a name="createDoubleBuffer(int)">
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<h4>createDoubleBuffer</h4>
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<pre>public static java.nio.DoubleBuffer createDoubleBuffer(int size)</pre>
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<div class="block">Construct a direct, native-ordered and cache-line-aligned doublebuffer with the specified number
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of elements.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in floats</dd>
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<dt><span class="strong">Returns:</span></dt><dd>a FloatBuffer</dd></dl>
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</li>
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</ul>
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<a name="createPointerBuffer(int)">
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<h4>createPointerBuffer</h4>
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<pre>public static <a href="../../../../org/lwjgl/PointerBuffer.html" title="class in org.lwjgl">PointerBuffer</a> createPointerBuffer(int size)</pre>
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<div class="block">Construct a cache-line-aligned PointerBuffer with the specified number
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>size</code> - The size, in memory addresses</dd>
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<dt><span class="strong">Returns:</span></dt><dd>a PointerBuffer</dd></dl>
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