content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.jnifuse.struct;
  
  import alluxio.jnifuse.utils.NativeLibraryLoader;
  
  import jnr.ffi.Runtime;
  import jnr.ffi.Struct;
  
  import java.nio.ByteBuffer;
  import java.nio.ByteOrder;
  
  public class FuseFileInfo extends Struct {
    public ByteBuffer buffer;
  
    public u_int64_t fh;
    public Signed32 flags;
  
    public FuseFileInfo(Runtime runtime, ByteBuffer buffer) {
      super(runtime);
      this.buffer = buffer;
      this.buffer.order(ByteOrder.LITTLE_ENDIAN);
    }
  
    public static FuseFileInfo of(ByteBuffer buffer) {
      Runtime runtime = Runtime.getSystemRuntime();
      // select the actual FuseFileInfo by loaded version
      NativeLibraryLoader.LoadState state = NativeLibraryLoader.getLoadState();
  
      // Ensure the lib has been loaded in testing
      // This is not possible when running a real cluster
      if (state == NativeLibraryLoader.LoadState.NOT_LOADED) {
        throw new RuntimeException("NativeLibraryLoader is not loaded");
      }
      FuseFileInfo fi = state == NativeLibraryLoader.LoadState.LOADED_2
          ? new Fuse2FuseFileInfo(runtime, buffer)
          : new Fuse3FuseFileInfo(runtime, buffer);
      fi.useMemory(jnr.ffi.Pointer.wrap(runtime, buffer));
      return fi;
    }
  }
  