FUNK

A C continuation implementation inspired by Adam Dunkels' ProtoThread.

Only 5 C macros and 1 struct definition; less than 50 lines of code.

Simple yet POWERFUL.

Now you can write a coroutine (generator, to be exact) in the following way, quick, simple, and in a natural way.

Enjoy the power of YIELD();

Continuation* add(Continuation* co,
    int a, int b, int * ret)
{
  struct timespec now;
  VAR_BEGIN
  struct timespec start;
  VAR_END

  if (!this) { *ret = -1; EXIT(); }

  clock_gettime(CLOCK_REALTIME, &this->start);

  while(1)
  {
    clock_gettime(CLOCK_REALTIME, &now);
    if ((now.tv_sec - this->start.tv_sec) > 1)
    {
      break;
    }
    YIELD();
  }

  *ret = a + b;
  EXIT();
}