xref: /gem5/src/systemc/tests/systemc/communication/sc_fifo/test03/test03.cpp

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

  test03.cpp --

  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

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// test of sc_fifo ports - interface access shortcut methods

#include "systemc.h"

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
            cout << "writer: blocking write\n";
            for( int i = 0; i < 20; i ++ ) {
                out.write( val ++ ); // blocking write
            }
            wait( 10, SC_NS );
            cout << "writer: " << out.num_free() << " free spaces\n";
            cout << "writer: non-blocking write\n";
            for( int i = 0; i < 20; i ++ ) {
                while( ! out.nb_write( val ++ ) ) { // non-blocking write
                    cout << "writer: waiting\n";
                    wait( 1, SC_NS );
                }
            }
        }
    }

    SC_CTOR( writer )
    {
        SC_THREAD( main_action );
    }
};

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
            cout << "reader: blocking read 1\n";
            for( int i = 0; i < 15; i ++ ) {
                in.read( val ); // blocking read
                cout << val << endl;
            }
            wait( 10, SC_NS );
            cout << "reader: " << in.num_available() << " available samples\n";
            cout << "reader: blocking read 2\n";
            for( int i = 0; i < 15; i ++ ) {
                cout << in.read() << endl; // blocking read
            }
            wait( 10, SC_NS );
            cout << "reader: " << in.num_available() << " available samples\n";
            cout << "reader: non-blocking read\n";
            for( int i = 0; i < 15; i ++ ) {
                while( ! in.nb_read( val ) ) { // non-blocking read
                    cout << "reader: waiting\n";
                    wait( 1, SC_NS );
                }
                cout << val << endl;
            }
        }
    }

    SC_CTOR( reader )
    {
        SC_THREAD( main_action );
    }
};

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;
}