content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org OSHI and other contributors.               ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.health.linux.driver.proc;
  
  import java.nio.ByteBuffer;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.miaixz.bus.core.lang.annotation.ThreadSafe;
  import org.miaixz.bus.health.Builder;
  import org.miaixz.bus.health.linux.ProcPath;
  
  /**
   * Utility to read auxiliary vector from {@code /proc/self/auxv}
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  @ThreadSafe
  public final class Auxv {
  
      /**
       * system page size
       */
      public static final int AT_PAGESZ = 6;
      /**
       * arch dependent hints at CPU capabilities
       */
      public static final int AT_HWCAP = 16;
      /**
       * frequency at which times() increments
       */
      public static final int AT_CLKTCK = 17;
  
      /**
       * Retrieve the auxiliary vector for the current process
       *
       * @return A map of auxiliary vector keys to their respective values
       * @see <a href= "https://github.com/torvalds/linux/blob/v3.19/include/uapi/linux/auxvec.h">auxvec.h</a>
       */
      public static Map<Integer, Long> queryAuxv() {
          ByteBuffer buff = Builder.readAllBytesAsBuffer(ProcPath.AUXV);
          Map<Integer, Long> auxvMap = new HashMap<>();
          int key;
          do {
              key = Builder.readNativeLongFromBuffer(buff).intValue();
              if (key > 0) {
                  auxvMap.put(key, Builder.readNativeLongFromBuffer(buff).longValue());
              }
          } while (key > 0);
          return auxvMap;
  
      }
  
  }
  