For those curious, here's what the protothread function in my previous post looks like after being passed through the C preprocessor and being indented using indent -linux:

char lights_thread(struct pt *pt)
{
{
char PT_YIELD_FLAG = 1;
switch ((pt)->lc) {
case 0:;
for (;;) {
printf("\n-> red") ( Read more... )

Here's an example C program showing implementation of the same simple algorithm using protothreads and a finite state machine. The protothread implementation is much easier to read and was easier to write after I figured out the protothread calls. Note that my FSM is longer than a lot of C FSM implementations you may see because I added an " ( Read more... )