// Learn with Examples, 2020, MIT license

#include <systemc>

using namespace sc_core;

SC_MODULE(BUFFER) {

sc_signal<int> s; // declares a signal channel

sc_buffer<int> b; // declares a buffer channel

SC_CTOR(BUFFER) {

SC_THREAD(writer); // writes to both signal and buffer

SC_THREAD(consumer1);

sensitive << s; // triggered by signal

dont_initialize();

SC_THREAD(consumer2);

sensitive << b; // triggered by buffer

dont_initialize();

}

void writer() {

int val = 1; // init value

while (true) {

for (int i = 0; i < 2; ++i) { // write same value to channel twice

s.write(val); // write to signal

b.write(val); // write to buffer

wait(1, SC_SEC); // wait after 1 s

}

val++; // value change

}

}

void consumer1() {

while (true) {

std::cout << sc_time_stamp() << ": consumer1 receives " << s.read() << std::endl;

wait(); // receives from signal

}

}

void consumer2() {

while (true) {

std::cout << sc_time_stamp() << ": consumer2 receives " << b.read() << std::endl;

wait(); // receives from buffer

}

}

};

int sc_main(int, char*[]) {

BUFFER buffer("buffer");

sc_start(4, SC_SEC);

return 0;

}