xref: /gem5/src/systemc/tests/systemc/communication/sc_fifo/test05/test05.cpp

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

  test05.cpp --

  Original Author: Martin Janssen, Synopsys, Inc., 2002-03-23

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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// test of sc_fifo event finders

#include "systemc.h"

#define W_INFO(msg) \
    cout << sc_time_stamp() << "," << sc_delta_count() \
         << ": writer: " << msg << endl;

#define R_INFO(msg) \
    cout << sc_time_stamp() << "," << sc_delta_count() \
         << ": reader: " << msg << endl;

SC_MODULE( writer )
{
    // port(s)
    sc_fifo_out<int> out;

    // process(es)
    void main_action()
    {
        int val = 0;
        while( true ) {
            wait( 10, SC_NS ); // wait for 10 ns
            W_INFO( "blocking write" );
            for( int i = 0; i < 20; i ++ ) {
                out.write( val ++ ); // blocking write
            }
            wait( 10, SC_NS );
            W_INFO( out.num_free() << " free spaces" );
            W_INFO( "non-blocking write" );
            for( int i = 0; i < 20; i ++ ) {
                while( ! out.nb_write( val ++ ) ) { // non-blocking write
                    W_INFO( "waiting" );
                    wait();
                    W_INFO( "data read event" );
                }
            }
        }
    }

    SC_CTOR( writer )
    {
        SC_THREAD( main_action );
        sensitive << out.data_read();
    }
};

SC_MODULE( reader )
{
    // port(s)
    sc_fifo_in<int> in;

    // process(es)
    void main_action()
    {
        int val;
        while( true ) {
            wait( 10, SC_NS ); // wait for 10 ns
            R_INFO( "blocking read 1" );
            for( int i = 0; i < 15; i ++ ) {
                in.read( val ); // blocking read
                R_INFO( val );
            }
            wait( 10, SC_NS );
            R_INFO( in.num_available() << " available samples" );
            R_INFO( "blocking read 2" );
            for( int i = 0; i < 15; i ++ ) {
                val = in.read(); // blocking read
                R_INFO( val );
            }
            wait( 10, SC_NS );
            R_INFO( in.num_available() << " available samples" );
            R_INFO( "non-blocking read" );
            for( int i = 0; i < 15; i ++ ) {
                while( ! in.nb_read( val ) ) { // non-blocking read
                    R_INFO( "waiting" );
                    wait();
                    R_INFO( "data written event" );
                }
                R_INFO( val );
            }
        }
    }

    SC_CTOR( reader )
    {
        SC_THREAD( main_action );
        sensitive << in.data_written();
    }
};

int sc_main( int, char*[] )
{
    // sc_clock c;

    // declare channel(s)
    sc_fifo<int> fifo( 10 );

    // instantiate block(s) and connect to channel(s)
    writer w( "writer" );
    reader r( "reader" );

    w.out( fifo );
    r.in( fifo );

    // run the simulation
    sc_start( 100, SC_NS );

    return 0;
}