SystemC 2.0

Example - cont...

class fifo : public sc_channel,

public write_if,

public read_if

{

public:

SC_CTOR(fifo) { // channel constructor

num_elements = first = 0;

}

void write(char c) {

if (num_elements == max)

wait(read_event);

data[(first + num_elements) % max ] = c;

++ num_elements;

write_event.notify();

}

void read(char& c) {

if (num_elements == 0)

wait(write_event);

c = data[first];

-- num_elements;

first = (first + 1) % max;

read_event.notify();

}

void reset() { num_elements = first = 0; } int num_available() {return num_elements;}

private:

enum e { max = 10 };

//max is just a constant in class scope

char data[max];

int num_elements, first;

sc_event write_event, read_event;

};