content: /*
   *
   * 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.
   *
   */
  package org.apache.bookkeeper.common.util.nativeio;
  
  import org.apache.bookkeeper.common.util.nativelib.NativeUtils;
  import org.apache.commons.lang3.SystemUtils;
  
  class NativeIOJni {
  
      static native int open(String pathname, int flags, int mode) throws NativeIOException;
  
      static native int fsync(int fd) throws NativeIOException;
  
      /**
       * fallocate is a linux-only syscall, so callers must handle the possibility that it does
       * not exist.
       */
      static native int fallocate(int fd, int mode, long offset, long len) throws NativeIOException;
  
      static native int posix_fadvise(int fd, long offset, long len, int flag) throws NativeIOException;
  
      static native int pwrite(int fd, long pointer, int count, long offset) throws NativeIOException;
  
      static native long posix_memalign(int alignment, int size) throws NativeIOException;
  
      static native void free(long pointer) throws NativeIOException;
  
      static native long lseek(int fd, long offset, int whence) throws NativeIOException;
  
      static native long pread(int fd, long pointer, long size, long offset) throws NativeIOException;
  
      static native int close(int fd) throws NativeIOException;
  
      static {
          try {
              if (SystemUtils.IS_OS_MAC_OSX) {
                  NativeUtils.loadLibraryFromJar("/lib/libnative-io.jnilib");
              } else if (SystemUtils.IS_OS_LINUX) {
                  NativeUtils.loadLibraryFromJar("/lib/libnative-io.so");
              } else {
                  throw new RuntimeException("OS not supported by Native-IO utils");
              }
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  }
  