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[david.long@xxxxxxxxxx]

Hi Daniele,

Unfortunately you cannot pass arguments to a process registered with the 
SC_THREAD macro (which is the only way to create threads in versions of 
SystemC earlier than 2.1).

A work-around that you should be able to use for your problem is to 
declare an index counter variable as a module member and then use that to 
initialise a local index variable as each thread starts, e.g. here is part 
of one of an example that did something similar (in SystemC 2.0.1)

template <int size=8>
SC_MODULE(mon)
{
  // ports
  sc_in<int> P1[size];

   void do_mon_thread()
  {
    int proc_no = n_proc++;
    cout << sc_time_stamp() << ": P1[" << proc_no << "] = " << 
P1[proc_no].read() << endl;
    while (true)
    {
      wait(P1[proc_no].value_changed_event());
      cout << sc_time_stamp() << ": P1[" << proc_no << "] = " << 
P1[proc_no].read() << endl;
    }
  } SC_CTOR(mon):n_proc(0)
  {
        for (int i=0; i<size; i++) {
        SC_THREAD(do_mon_thread);
        }
  }
private:
        int n_proc;
};

Hope that helps!

Regards,
Dave

-- 
Dr David Long 
Senior Consultant 

Doulos - Developing Design Know-how
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<systemc-forum@xxxxxxxxxxxxxxxxx> wrote on 13/01/2010 09:41:50:

> From:
> 
> Daniele Bortolotti <bobo.drugo@xxxxxxxxx>
> 
> To:
> 
> david.long@xxxxxxxxxx
> 
> Cc:
> 
> systemc-forum@xxxxxxxxxxxxxxxxx
> 
> Date:
> 
> 13/01/2010 09:42
> 
> Subject:
> 
> Re: [systemc-forum] Help on parameterizing sc_methods/sc_threads  number
> 
> Sent by:
> 
> <systemc-forum@xxxxxxxxxxxxxxxxx>
> 
> Hi David, 
> 
> thanks for your prompt reply.
> I am very interested in your solution about the creation of dynamic 
> processes (sc_spawn etc ...) but I am bound to version 2.0.1 of 
> SystemC that does not implement dynamic processes. So is there some 
> other way? Maybe some C++ trick ? :-) 
> 
> I tried the solution suggested by sr raksha but when I use a loop 
> for binding sc_threads to functions I can't pass an index argument 
> (I hope I'm wrong but the compiler complains about that).
> 
> Thanks for your help.
> 
> Best Regards
> Daniele
> 

> 2010/1/11 <david.long@xxxxxxxxxx>
> Hi Daniele, 
> 
> To parameterise your code, you should use "dynamic processes", 
> rather than the "static processes" (i.e. processes created using the
> SC_THREAD macro) that you are currently using. The function that 
> defines a dynamic process can take arguments (e.g. to specify the 
> port index for a polling thread) - you are not allowed to do this 
> with static processes. The dynamic processes can be created within 
> your module constructor by calling sc_spawn (it is also legal to 
> create dynamic processes after a module has been constructed but I 
> don't think you need to do that in this case). 
> 
> Your code could look something like this: 
> 
> #define SC_INCLUDE_DYNAMIC_PROCESSES 
> 
> SC_MODULE(THREED_xbar) 
> ... 
>     // prototypes 
>      void req_polling(int index); 
> ... 
> 
>      THREED_xbar(sc_module_name nm, ...) : ... 
> sc_spawn_options options; 
> options.set_sensitivity(clock.pos()); 
> for (int index = 0; index < N; index++) { 
>   sc_spawn( sc_bind
> (&THREED_xbar::req_polling,this,index),sc_gen_unique_name
> ("req_polling"),&options); 
> } 
> 
> ... //etc 
> } 
> }; 
>    
> Hope that's enough detail to give you the idea! 
> 
> Regards, 
> Dave 
> 
> -- 
> Dr David Long 
> Senior Consultant 
> 
> Doulos - Developing Design Know-how
> VHDL * Verilog * SystemVerilog * SystemC * PSL * Perl * Tcl/Tk * 
> Project Services
> 
> Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire, BH24 
1AW, UK
> Tel:  + 44 (0)1425 471223                       Email: 
david.long@xxxxxxxxxx
>        
> Fax:  +44 (0)1425 471573                        http://www.doulos.com
> 
> 
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> 
> <systemc-forum@xxxxxxxxxxxxxxxxx> wrote on 10/01/2010 15:16:30:
> 
> > From: 
> > 
> > Daniele Bortolotti <bobo.drugo@xxxxxxxxx> 
> > 
> > To: 
> > 
> > systemc-forum@xxxxxxxxxxxxxxxxx 
> > 
> > Date: 
> > 
> > 10/01/2010 15:17 
> > 
> > Subject: 
> > 
> > [systemc-forum] Help on parameterizing sc_methods/sc_threads number 
> > 
> > Sent by: 
> > 
> > <systemc-forum@xxxxxxxxxxxxxxxxx> 
> > 
> > Hi everybody! 
> > 
> > I'm modelling a crossbar ( interconnect matrix ) for my MSc final 
> > project, I just need it to be 2:2 ( 2 inputs and 2 outputs ) and 
> > that's already done. Besides I'd like to make it a parameterized 
module 
> > xbar_N:M with N inputs (from masters) and M outputs (to slaves) and 
> > I'd like to reuse/extend what I've already coded. 
> > 
> > There are three types of sc_thread in my model : one for polling 
> > masters' requests, an arbiter for scheduling, grants and for 
> > connecting input ports to output ports, and a simple finite state 
> > machine for "talking" with each slave memory. 
> > 
> > So I need N polling threads and M fsm threads....but I don't know 
> > how to do that. 
> > 
> > Is there any way I can declare and define a variable number of 
> > threads? Maybe a loop? 
> > 
> > Here's some of the code from the xbar_2:2.h file : 
> > 
> > SC_MODULE(THREED_xbar) 
> > { 
> >     sc_in<bool>                  clock; 
> >     // other ports .... 
> > 
> >   public: 
> >     // various signals .... 
> > 
> >     // prototypes 
> >     void req0_polling(); 
> >     void req1_polling(); 
> >     void arbiter(); 
> >   void fsm0(); 
> >     void fsm1(); 
> >     SC_HAS_PROCESS(THREED_xbar); 
> >     THREED_xbar(sc_module_name nm,  
> > unsigned char ID, 
> >         unsigned long int noc_start_add, 
> > unsigned long int noc_end_add, 
> > unsigned char delay, 
> > sc_trace_file *tf, 
> >                         bool tracing) : 
> >         sc_module(nm), 
> > ID(ID), 
> > noc_start_add(noc_start_add), 
> > noc_end_add(noc_end_add), 
> > delay(delay) { 
> > 
> >  SC_THREAD(req0_polling); 
> >    sensitive << clock.pos(); 
> >     SC_THREAD(req1_polling); 
> >    sensitive << clock.pos(); 
> >  SC_THREAD(arbiter); 
> >    sensitive << clock.neg(); 
> >  SC_THREAD(fsm0); 
> >   sensitive << clock.pos(); 
> >  SC_THREAD(fsm1); 
> >    sensitive << clock.pos(); 
> >  } 
> > } 
> > } 
> > 
> > and in the xbar_2:2.cpp file I've something like this 
> > 
> > void THREED_xbar::req0_polling( ) { 
> >   while(true) { 
> >   ..... 
> >  wait(); 
> >   } 
> > } 
> > 
> > void THREED_xbar::req1_polling( ) { 
> >   while(true) { 
> >   ....... 
> >  wait();  
> >   } 
> > } 
> > 
> > void THREED_xbar::arbiter( ) { 
> >   while(true) { 
> >  ....... 
> >  wait();  
> >   } 
> > } 
> > 
> > void THREED_xbar::fsm0( ) { 
> >   while(true) { 
> >   ....... 
> >   wait();  
> >   } 
> > } 
> > 
> > void THREED_xbar::fsm1( ) { 
> >   while(true) { 
> >   ....... 
> >   wait();  
> >   } 
> > } 
> > 
> > req0_polling and req1_polling have exactly the same code except for 
> > an index (the core ID) 
> > so I suppose there's a way to parameterize this code (the same for 
> > fsm0 and fsm1). 
> > 
> > any suggestion is welcome!!! 
> > 
> > thanks and regards 
> > -daniele-