src/systemc/tests/systemc/bugs/async_reset_init/async_reset_init.cpp

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  more contributor license agreements.  See the NOTICE file distributed
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/*****************************************************************************

  async_reset_init.cpp -- Starting a process in async reset state

  Original Author: Philipp A. Hartmann, Intel Corporation, 2017-07-23

 *****************************************************************************/

#include <systemc>
#include <iomanip>

SC_MODULE(module)
{
  sc_core::sc_in<bool> rst_in;
  sc_core::sc_event    ev;

  SC_CTOR(module)
    : rst_in("rst_in")
    , ev("ev")
  {
    SC_THREAD(thread0);
      sensitive << ev;
      async_reset_signal_is(rst_in,true);

    SC_THREAD(thread1);
      sensitive << ev;
      async_reset_signal_is(rst_in,true);
      dont_initialize();

    SC_METHOD(method0);
      sensitive << ev;
      async_reset_signal_is(rst_in,true);

    SC_METHOD(method1);
      sensitive << ev;
      async_reset_signal_is(rst_in,true);
      dont_initialize();
  }

  void thread0() { do_thread(); }
  void thread1() { do_thread(); }

  void do_thread()
  {
    print( "reset state" );
    wait();
    print( "reset done" );

    while(1) // main loop
    {
      wait();
      print( "continuing" );
    }
  }

  void method0() { do_method(); }
  void method1() { do_method(); }

  void do_method()
  {
    if( rst_in.read() ) {
      print("reset state");
    } else {
      print("running");
    }
  }

  void print(const char* msg)
  {
    using namespace sc_core;
    using namespace std;
    cout
      << setw(6) << sc_time_stamp()
      << " (" << sc_delta_count() << "): "
      << sc_get_current_process_handle().name() << ": "
      << msg
      << endl;
  }
}; // SC_MODULE(module)

int sc_main(int argc, char* argv[])
{
  using namespace sc_core;
  using namespace std;

  sc_signal<bool> rst_sig;
  rst_sig.write(true);

  module top("top");
  top.rst_in(rst_sig);

  cout << "Starting simulation ... " << endl;

  sc_start(10, SC_NS);
  top.ev.notify(SC_ZERO_TIME);
  sc_start(10, SC_NS);

  rst_sig.write(false); // releasing reset

  sc_start(10, SC_NS);
  top.ev.notify(SC_ZERO_TIME);
  sc_start(10, SC_NS);
  top.ev.notify(SC_ZERO_TIME);
  sc_start(10, SC_NS);

  rst_sig.write(true);  // entering reset

  sc_start(10, SC_NS);
  top.ev.notify(SC_ZERO_TIME);
  sc_start(10, SC_NS);

  cout << "... done." << endl;
  sc_stop();
  return 0;
}