STATIC_NOINLINE
void g_initialstub(struct stacklet_thread_s *thrd,
stacklet_run_fn run, void *run_arg)
{
struct stacklet_s *result;
/* The following call returns twice! */
result = (struct stacklet_s *) _stacklet_switchstack(g_initial_save_state,
g_restore_state,
thrd);
if (result == NULL && thrd->g_source != NULL) {
/* First time it returns. Only g_initial_save_state() has run
and has created 'g_source'. Call run(). */
thrd->g_current_stack_stop = thrd->g_current_stack_marker;
result = run(thrd->g_source, run_arg);
/* Then switch to 'result'. */
check_valid(result);
thrd->g_target = result;
_stacklet_switchstack(g_destroy_state, g_restore_state, thrd);
_check_failed("we should not return here");
abort();
}
/* The second time it returns. */
}
stacklet_handle stacklet_switch(stacklet_handle target)
{
long stackmarker;
stacklet_thread_handle thrd = target->stack_thrd;
if (thrd->g_current_stack_stop <= (char *)&stackmarker)
thrd->g_current_stack_stop = ((char *)&stackmarker) + 1;
thrd->g_target = target;
_stacklet_switchstack(g_save_state, g_restore_state, thrd);
return thrd->g_source;
}
