pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / misc / src / java / org / apache / lucene / store / NativePosixUtil.java

diff --git a/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/store/NativePosixUtil.java b/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/store/NativePosixUtil.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/store/NativePosixUtil.java
@@ -0,0 +1,49 @@
+package org.apache.lucene.store;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.IOException;
+import java.io.FileDescriptor;
+import java.nio.ByteBuffer;
+
+public final class NativePosixUtil {
+  public final static int NORMAL = 0;
+  public final static int SEQUENTIAL = 1;
+  public final static int RANDOM = 2;
+  public final static int WILLNEED = 3;
+  public final static int DONTNEED = 4;
+  public final static int NOREUSE = 5;
+
+  static {
+    System.loadLibrary("NativePosixUtil");
+  }
+
+  private static native int posix_fadvise(FileDescriptor fd, long offset, long len, int advise) throws IOException;
+  public static native int posix_madvise(ByteBuffer buf, int advise) throws IOException;
+  public static native int madvise(ByteBuffer buf, int advise) throws IOException;
+  public static native FileDescriptor open_direct(String filename, boolean read) throws IOException;
+  public static native long pread(FileDescriptor fd, long pos, ByteBuffer byteBuf) throws IOException;
+
+  public static void advise(FileDescriptor fd, long offset, long len, int advise) throws IOException {
+    final int code = posix_fadvise(fd, offset, len, advise);
+    if (code != 0) {
+      throw new RuntimeException("posix_fadvise failed code=" + code);
+    }
+  }
+}
+