# separate components into different files

use stdio.h
use sched.h
use rendezvous.h

int main()
	sched_init()
	channel_int ch
	rendezvous_init(&ch.r)
	count_to_three c3
	count_to_three_init(&c3, &ch)
	printer pr
	printer_init(&pr, &ch)
	start(&c3.p)
	start(&pr.p)
	run()

	count_to_n cn
	count_to_n_init(&cn, &ch, 15)
	start(&cn.p)
	run()

	return 0

struct channel_int
	rendezvous r
	int data

# we could do with Plan 9 cc's struct inheritance
# my namespaces feature will be better, though!
struct count_to_three
	process p
	channel_int *out
count_to_three_init(count_to_three *x, channel_int *out)
	process_init(&x->p, count_to_three_f)
	x->out = out
int count_to_three_f(process *p)
	count_to_three *d = (count_to_three *)p
	rendezvous *out_r = &d->out->r
	switch p->pc
	1	if meet(out_r, p)
			p->pc = 2
			return 0
	2	d->out->data = 1
		part(out_r)
		if meet(out_r, p)
			p->pc = 3
			return 0
	3	d->out->data = 2
		part(out_r)
		if meet(out_r, p)
			p->pc = 4
			return 0
	4	d->out->data = 3
		part(out_r)
	return 0

struct printer
	process p
	channel_int *in
printer_init(printer *x, channel_int *in)
	process_init(&x->p, printer_f)
	x->in = in
int printer_f(process *p)
	printer *d = (printer *)p
	rendezvous *in_r = &d->in->r
	switch p->pc
	1	while 1
			p->pc = 2
			pass(in_r, p)
			return 0
	2		printf("%d\n", d->in->data)
	return 0

struct count_to_n
	process p
	channel_int *out
	int n
count_to_n_init(count_to_n *x, channel_int *out, int n)
	process_init(&x->p, count_to_n_f)
	x->out = out
	x->n = n
int count_to_n_f(process *p)
	count_to_n *d = (count_to_n *)p
	rendezvous *out_r = &d->out->r
	switch p->pc
	1	if meet(out_r, p)
			p->pc = 2
			return 0
	2	d->out->data = 1
		part(out_r)
		while d->out->data < d->n
			if meet(out_r, p)
				p->pc = 3
				return 0
	3		++ (d->out->data)
			part(out_r)
	return 0