/*
    * Copyright 2021-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.jna.platform.unix;
   
   import java.nio.ByteBuffer;
   
   import com.sun.jna.Native;
  
  import oshi.util.FileUtil;
  
  /**
   * C library. This class should be considered non-API as it may be removed if/when its code is incorporated into the JNA
   * project.
   */
  public interface AixLibc extends CLibrary {
  
      AixLibc INSTANCE = Native.load("c", AixLibc.class);
  
      int PRCLSZ = 8;
      int PRFNSZ = 16;
      int PRARGSZ = 80;
  
      class AixPsInfo {
          public int pr_flag; // process flags from proc struct p_flag
          public int pr_flag2; // process flags from proc struct p_flag2
          public int pr_nlwp; // number of threads in process
          public int pr__pad1; // reserved for future use
          public long pr_uid; // real user id
          public long pr_euid; // effective user id
          public long pr_gid; // real group id
          public long pr_egid; // effective group id
          public long pr_pid; // unique process id
          public long pr_ppid; // process id of parent
          public long pr_pgid; // pid of process group leader
          public long pr_sid; // session id
          public long pr_ttydev; // controlling tty device
          public long pr_addr; // internal address of proc struct
          public long pr_size; // size of process image in KB (1024) units
          public long pr_rssize; // resident set size in KB (1024) units
          public Timestruc pr_start; // process start time, time since epoch
          public Timestruc pr_time; // usr+sys cpu time for this process
          public short pr_cid; // corral id
          public short pr__pad2; // reserved for future use
          public int pr_argc; // initial argument count
          public long pr_argv; // address of initial argument vector in user process
          public long pr_envp; // address of initial environment vector in user process
          public byte[] pr_fname = new byte[PRFNSZ]; // last component of exec()ed pathname
          public byte[] pr_psargs = new byte[PRARGSZ]; // initial characters of arg list
          public long[] pr__pad = new long[8]; // reserved for future use
          public AixLwpsInfo pr_lwp; // "representative" thread info
  
          public AixPsInfo(ByteBuffer buff) {
              this.pr_flag = FileUtil.readIntFromBuffer(buff);
              this.pr_flag2 = FileUtil.readIntFromBuffer(buff);
              this.pr_nlwp = FileUtil.readIntFromBuffer(buff);
              this.pr__pad1 = FileUtil.readIntFromBuffer(buff);
              this.pr_uid = FileUtil.readLongFromBuffer(buff);
              this.pr_euid = FileUtil.readLongFromBuffer(buff);
              this.pr_gid = FileUtil.readLongFromBuffer(buff);
              this.pr_egid = FileUtil.readLongFromBuffer(buff);
              this.pr_pid = FileUtil.readLongFromBuffer(buff);
              this.pr_ppid = FileUtil.readLongFromBuffer(buff);
              this.pr_pgid = FileUtil.readLongFromBuffer(buff);
              this.pr_sid = FileUtil.readLongFromBuffer(buff);
              this.pr_ttydev = FileUtil.readLongFromBuffer(buff);
              this.pr_addr = FileUtil.readLongFromBuffer(buff);
              this.pr_size = FileUtil.readLongFromBuffer(buff);
              this.pr_rssize = FileUtil.readLongFromBuffer(buff);
              this.pr_start = new Timestruc(buff);
              this.pr_time = new Timestruc(buff);
              this.pr_cid = FileUtil.readShortFromBuffer(buff);
              this.pr__pad2 = FileUtil.readShortFromBuffer(buff);
              this.pr_argc = FileUtil.readIntFromBuffer(buff);
              this.pr_argv = FileUtil.readLongFromBuffer(buff);
              this.pr_envp = FileUtil.readLongFromBuffer(buff);
              FileUtil.readByteArrayFromBuffer(buff, this.pr_fname);
              FileUtil.readByteArrayFromBuffer(buff, this.pr_psargs);
              for (int i = 0; i < pr__pad.length; i++) {
                  this.pr__pad[i] = FileUtil.readLongFromBuffer(buff);
              }
              this.pr_lwp = new AixLwpsInfo(buff);
          }
  
      }
  
      class AixLwpsInfo {
          public long pr_lwpid; // thread id
          public long pr_addr; // internal address of thread
          public long pr_wchan; // wait addr for sleeping thread
          public int pr_flag; // thread flags
          public byte pr_wtype; // type of thread wait
          public byte pr_state; // numeric scheduling state
          public byte pr_sname; // printable character representing pr_state
          public byte pr_nice; // nice for cpu usage
          public int pr_pri; // priority, high value = high priority
          public int pr_policy; // scheduling policy
          public byte[] pr_clname = new byte[PRCLSZ]; // printable character representing pr_policy
         public int pr_onpro; // processor on which thread last ran
         public int pr_bindpro; // processor to which thread is bound
 
         public AixLwpsInfo(ByteBuffer buff) {
             this.pr_lwpid = FileUtil.readLongFromBuffer(buff);
             this.pr_addr = FileUtil.readLongFromBuffer(buff);
             this.pr_wchan = FileUtil.readLongFromBuffer(buff);
             this.pr_flag = FileUtil.readIntFromBuffer(buff);
             this.pr_wtype = FileUtil.readByteFromBuffer(buff);
             this.pr_state = FileUtil.readByteFromBuffer(buff);
             this.pr_sname = FileUtil.readByteFromBuffer(buff);
             this.pr_nice = FileUtil.readByteFromBuffer(buff);
             this.pr_pri = FileUtil.readIntFromBuffer(buff);
             this.pr_policy = FileUtil.readIntFromBuffer(buff);
             FileUtil.readByteArrayFromBuffer(buff, this.pr_clname);
             this.pr_onpro = FileUtil.readIntFromBuffer(buff);
             this.pr_bindpro = FileUtil.readIntFromBuffer(buff);
         }
     }
 
     /**
      * 64-bit timestruc required for psinfo structure
      */
     class Timestruc {
         public long tv_sec; // seconds
         public int tv_nsec; // nanoseconds
         public int pad; // nanoseconds
 
         public Timestruc(ByteBuffer buff) {
             this.tv_sec = FileUtil.readLongFromBuffer(buff);
             this.tv_nsec = FileUtil.readIntFromBuffer(buff);
             this.pad = FileUtil.readIntFromBuffer(buff);
         }
     }
 
     /**
      * Returns the caller's kernel thread ID.
      *
      * @return the caller's kernel thread ID.
      */
     int thread_self();
 }