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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.system;
     18 
     19 import libcore.util.Objects;
     20 
     21 /**
     22  * Information returned/taken by fcntl(2) F_GETFL and F_SETFL. Corresponds to C's
     23  * {@code struct flock} from
     24  * <a href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fcntl.h.html">&lt;fcntl.h&gt;</a>
     25  *
     26  * @hide
     27  */
     28 public final class StructFlock {
     29   /** The operation type, one of F_RDLCK, F_WRLCK, or F_UNLCK. */
     30   public short l_type;
     31 
     32   /** How to interpret l_start, one of SEEK_CUR, SEEK_END, SEEK_SET. */
     33   public short l_whence;
     34 
     35   /** Start offset. */
     36   public long l_start; /*off_t*/
     37 
     38   /** Byte count to operate on. */
     39   public long l_len; /*off_t*/
     40 
     41   /** Process blocking our lock (filled in by F_GETLK, otherwise unused). */
     42   public int l_pid; /*pid_t*/
     43 
     44   @Override public String toString() {
     45     return Objects.toString(this);
     46   }
     47 }
     48