peterson_abstract.c

// j = 1-i ; i=0, j=1
// Process Pi
Pi() {
	flag[i] = true;     
	turn = j;
	// entry section
	while (flag[j] && turn == j); // Busy wait

	// Critical Section

	// exit section
	flag[i] = false;
}

// j = 1-i ; i=0, j=1
// Process Pj
Pj() {
	flag[j] = true;
	turn = i;
	while (flag[i] && turn == i); // Busy wait

	// Critical Section
	
	flag[j] = false;
}