1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

// Learn with Examples, 2020, MIT license
#include <systemc>
using namespace sc_core;

SC_MODULE(QUEUE_COMBINED) {
  sc_event_queue eq1, eq2;
  SC_CTOR(QUEUE_COMBINED) {
    SC_THREAD(trigger);
    SC_THREAD(catcher);
    sensitive << eq1 << eq2; // eq1 "or" eq2, cannot "and"
    dont_initialize();
  }
  void trigger() {
    eq1.notify(1, SC_SEC); // eq1 at 1 s
    eq1.notify(2, SC_SEC); // eq1 at 2 s
    eq2.notify(2, SC_SEC); // eq2 at 2 s
    eq2.notify(3, SC_SEC); // eq2 at 3 s
  }
  void catcher() {
    while (true) {
      std::cout << sc_time_stamp() << ": catches trigger" << std::endl;
      wait(); // cannot use event queue in dynamic sensitivity
    }
  }
};

int sc_main(int, char*[]) {
  QUEUE_COMBINED combined("combined");
  sc_start();
  return 0;
}

// Result:
// eq1
1 s: catches trigger
// both eq1 and eq2
2 s: catches trigger
// eq2
3 s: catches trigger