dol/src/dol/visitor/hdsd/scd/fsm/scd_stm_time_req.cpp

   1 #include "fsm/scd_stm_time_req.h"
   2
   3 #include "scd_logging.h"
   4 #include "scd_exception.h"
   5 #include "scd_cont_man_master.h"
   6
   7
   8 void scd_stm_time_req::set_busy()
   9 {
  10     _send_time_nack();
  11     _fsm.load_state();
  12 }
  13
  14
  15 void scd_stm_time_req::process()
  16 {
  17     if (!_check_slaves())
  18             return;
  19
  20     std::list<scd_cont_slave_wrapper*>::iterator iter;
  21     sc_core::sc_time min_step = _time_step;
  22
  23     for (iter = _slaves.begin(); iter != _slaves.end(); iter++)
  24     {
  25         if ( !(*iter)->time_req() && !(*iter)->time_ack() )
  26         {
  27             // received time_nack from this slave
  28             _send_time_nack();
  29             _fsm.load_state();
  30             return;
  31         }
  32         else if ( !(*iter)->time_ack() )
  33         {
  34             // this slave did not respond yet
  35             return;
  36         }
  37         else
  38         {
  39             // received time_ack => search the smallest step
  40             sc_core::sc_time time_slave = (*iter)->get_time_step();
  41             if (min_step == sc_core::SC_ZERO_TIME)
  42                 min_step = time_slave;
  43             else if (min_step > time_slave &&
  44                     time_slave != sc_core::SC_ZERO_TIME)
  45                 min_step = time_slave;
  46         }
  47     }
  48
  49     // all slaves acknkowledged
  50     _time_step = min_step;
  51     for (iter = _slaves.begin(); iter != _slaves.end(); iter++)
  52         (*iter)->send_time(min_step);
  53
  54     _fsm.set_state(_st_time);
  55 }
  56
  57
  58 void scd_stm_time_req::_send_time_nack()
  59 {
  60     std::list<scd_cont_slave_wrapper*>::iterator iter;
  61
  62     for (iter = _slaves.begin(); iter != _slaves.end(); iter++)
  63         (*iter)->send_time_nack();
  64 }