void uthread_exit ()
{
size_t space_for_mem_alloc_hdr[16]; /* just in case ... */
uthread_t *cur_thread, *new_thread, tmp;
/* active thread is exiting */
cur_thread = list_remove ( &active, FIRST, NULL );
space_for_mem_alloc_hdr[0] = (size_t) cur_thread;
/*remove compiler 'not-used' warning */
free ( cur_thread->stack );
/* freeing it, but using it still - till the end of this function
(parameters are on stack!) */
tmp = *cur_thread;
free ( cur_thread );
/* pick next ready thread */
new_thread = list_remove ( &ready, FIRST, NULL );
/* make it active */
list_append ( &active, new_thread, &new_thread->list );
/* switch to it */
arch_switch_to_uthread ( &tmp.context, &new_thread->context );
}
void uthread_yield ()
{
uthread_t *cur_thread, *new_thread;
/* remove current thread from 'active' and put it as last in 'ready' */
cur_thread = list_remove ( &active, FIRST, NULL );
list_append ( &ready, cur_thread, &cur_thread->list );
/* remove first thread from 'ready' and put it in 'active' */
new_thread = list_remove ( &ready, FIRST, NULL );
list_append ( &active, new_thread, &new_thread->list );
/* switch to new active thread */
arch_switch_to_uthread ( &cur_thread->context, &new_thread->context );
}
void uthread_exit ()
{
uthread_t *cur_thread, *new_thread, tmp;
/* active thread is exiting */
cur_thread = list_remove ( &active, FIRST, NULL );
free ( cur_thread->stack );
/* freeing it, but using it still - till the end of this function
(parameters are on stack!) */
tmp = *cur_thread;
free ( cur_thread );
/* pick next ready thread */
new_thread = list_remove ( &ready, FIRST, NULL );
/* make it active */
list_append ( &active, new_thread, &new_thread->list );
/* switch to it */
arch_switch_to_uthread ( &tmp.context, &new_thread->context );
}
