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process_model.hh

/* -*-      Mode:C++ -*- */

/*
 * process_model.hh
 * Copyright (C) 1999 by John Heidemann
 * $Id: process_model.hh,v 1.26 2003/07/15 03:32:24 johnh Exp $
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 */


#ifndef lavaps_process_model_h
#define lavaps_process_model_h

#include <unistd.h>  // pid_t

#include "change_tracking.hh"
#include "process_view.hh"
#include "const_str.hh"

class process_model;
class process_view;

/*
 * process_model: a system-independent representation of the
 * interesting information about a process.
 */
class process_model {
      // most of these are to give access to the details
      // cleaner would be to have set/access functions for *each*
      // member variable.
      friend class process_view;

protected:
      process_model(const process_model& tb);
      process_model& operator=(const process_model& tb);

      // used for tracking process age via age()
      time_t last_run_time_,
            next_age_time_;
      int age_increment_;
      change_tracking<int> exponential_age_;

      process_view *pv_;

      // rest is the details:
      int pid_;   // required!
      int uid_;
      // should add tty?  only when we want to use it.
      const_str cmd_;   // program name (just the program, not the whole cmd line)
      change_tracking<int> cmd_hash_;   // hash of cmd name

      // int priority_;   // kernel adjusted prio
      int nice_;       // user-supplied nice value
      time_t start_time_;
      change_tracking<time_t> utime_;  // cumulative user time (in msec)
      change_tracking<time_t> stime_;  // cumulative system time

      // use KB below to avoid unsigned ugliness
      change_tracking<int> virtual_size_;      // total memory size in KiB
      change_tracking<int> resident_;      // resident memory size in KiB (could be partially shared)
      change_tracking<int> inmem_pct_;    // % of process in memory

      static int cmd_hashify(const char *cmd);

public:
      bool found_;   // found this scan

      process_model(int pid);
      ~process_model();

      void init_view() { pv_ = new process_view(this); }
      void update_view() { pv_->update(); }

      int age() { return exponential_age_.current(); }
      void age(time_t now, bool reinit = false);

      void set_uid(int a) { uid_ = a; }
      void set_nice(int a) { nice_ = a; }
      void set_start_time(int a) { start_time_ = a; }
      void set_cmd(const char *c);

      void set_utime(int t) { utime_.tick_set(t); }  // times in msec
      void set_stime(int t) { stime_.tick_set(t); }
      void set_virtual_size(int s) { virtual_size_.tick_set(s); }
      void set_resident(int s) { resident_.tick_set(s); }
      // void set_inmem_pct(int s) { inmem_pct_.tick_set(s); }

      void check_inmem_pct();

      int pid() { return pid_; }

      void dump();

      process_view *view() { return pv_; }
};

#endif /* lavaps_process_model_h */


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