test16.cpp revision 12855:588919e0e4aa 
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19
20/*****************************************************************************
21
22  test16.cpp -- sc_writer_policy: test SC_SIGNAL_WRITE_CHECK=CONFLICT
23
24  Original Author: Philipp A. Hartmann, Intel, 2017-05-12
25
26 *****************************************************************************/
27
28// see https://github.com/OSCI-WG/systemc/issues/222
29
30#define SC_INCLUDE_DYNAMIC_PROCESSES
31#include <systemc>
32#include <iomanip>
33#include <sstream>
34
35using sc_core::SC_NS;
36using sc_core::SC_ZERO_TIME;
37
38SC_MODULE(dut)
39{
40    static const int num_drivers = 3;
41
42    SC_CTOR(dut)
43      : sig("sig")
44    {
45        SC_THREAD(run);
46        for(int id=1; id <= num_drivers; ++id) {
47          // first and last driver write the same values
48          spawn_driver( id, (id-1) % (num_drivers-1) + 1 );
49        }
50    }
51
52private:
53    void spawn_driver(int id, int value) {
54      sc_assert( id > 0 && id <= num_drivers );
55      sc_core::sc_spawn_options sp;
56      sp.set_sensitivity(&ev[id-1]);
57      sp.spawn_method();
58      sp.dont_initialize();
59
60      std::stringstream nm;
61      nm << "p" << id;
62      sc_spawn( sc_bind(&dut::driver, this, value), nm.str().c_str(), &sp );
63    }
64
65    void run() {
66      wait(1, SC_NS);
67
68      std::cout << "\n*** trigger each driver in individual delta cycles" << std::endl;
69      for(int id=1; id <= num_drivers; ++id) {
70        trigger(id); // NO error expected (environment override)
71        wait(SC_ZERO_TIME);
72        log();
73      }
74
75      wait(1, SC_NS);
76      std::cout << "\n*** trigger 1-2-3 in the same delta cycle" << std::endl;
77      trigger(1);
78      trigger(2); // error expected
79      trigger(3); // error expected
80      wait(SC_ZERO_TIME);
81      log();
82
83      wait(1, SC_NS);
84      std::cout << "\n*** trigger 2-3-1 in the same delta cycle" << std::endl;
85      trigger(2);
86      trigger(3); // error expected
87      trigger(1); // error expected
88      wait(SC_ZERO_TIME);
89      log();
90
91      wait(1, SC_NS);
92      std::cout << "\n*** trigger 3-1-2 in the same delta cycle" << std::endl;
93      trigger(3);
94      trigger(1); // error expected
95      trigger(2); // error expected
96      wait(SC_ZERO_TIME);
97      log();
98
99      wait(1, SC_NS);
100      std::cout << "\n*** trigger 1-1-2-2 in the same delta cycle" << std::endl;
101      trigger(1);
102      trigger(1); // NO error expected (current process)
103      trigger(2); // error expected
104      trigger(2); // NO error expected (current process)
105      wait(SC_ZERO_TIME);
106      log();
107    }
108
109    void trigger(int id) {
110      sc_assert( id > 0 && id <= num_drivers );
111      ev[id-1].notify();
112      wait(ev_schedule);
113    }
114
115    void driver(int value) {
116        log(value);
117        sig.write(value); // errors suppressed via report handler below
118        ev_schedule.notify();
119    }
120
121    void log(int value = -1) {
122        std::cout
123          << "\n"
124          << std::setw(8) << sc_core::sc_get_current_process_handle().name() << ": "
125          << std::setw(5) << sc_core::sc_time_stamp()
126          << " @ " << std::setw(2) << sc_core::sc_delta_count() << ": "
127          << ( (value!=-1) ? "writing " : "reading " )
128          << sig.name() << " = "
129          << ( (value!=-1) ? value : sig.read() )
130          << std::endl;
131    }
132
133    sc_core::sc_signal<int, sc_core::SC_ONE_WRITER> sig; // use single-writer signal
134    sc_core::sc_event ev_schedule, ev[num_drivers];
135};
136
137#ifdef _WIN32
138#define putenv _putenv // Windows deprecates putenv
139#endif
140
141int sc_main( int, char*[] )
142{
143    // prepare environment variable (takes a char*)
144    putenv(const_cast<char*>("SC_SIGNAL_WRITE_CHECK=CONFLICT"));
145    // and reset simulation context to pick it up (non-standard)
146    sc_core::sc_get_curr_simcontext()->reset();
147
148    // report multiple writer errors as warnings
149    sc_core::sc_report_handler::set_actions(
150        sc_core::SC_ID_MORE_THAN_ONE_SIGNAL_DRIVER_
151      , sc_core::SC_DEFAULT_WARNING_ACTIONS
152    );
153
154    dut top("dut");
155    sc_core::sc_start();
156    std::cout << "\nProgram completed" << std::endl;
157    return 0;
158}
159