static void wait_for_n_screens(strand self, struct layer *layer, float n_screens)
{
double distance = 0.;
while (distance < (viewport_h * n_screens)) {
float elapsed_time = strand_yield(self);
distance += layer->speed * elapsed_time;
}
}
static void simple_ab()
{
struct bit { uint64_t *p; bool v; };
int fn_bit(strand self, void *bit_) {
struct bit *bit = (struct bit *)bit_;
for (int i = 0; i < 32; ++i) {
*bit->p = (*bit->p << 1) | bit->v;
strand_yield(self);
}
return 1;
}
strand a, b;
uint64_t bits = 0;
bool a_done, b_done;
note("alternate between two functions");
a = strand_spawn(fn_bit, &(struct bit){ .p = &bits, .v = 0}, 128);
static void wait_for_elapsed_time(strand self, float goal)
{
double accum = 0.;
while (accum < goal)
accum += strand_yield(self);
}