Scheme_Object *scheme_place_send(int argc, Scheme_Object *args[]) {
if (argc == 2) {
Scheme_Object *mso;
Scheme_Place_Bi_Channel *ch;
if (SAME_TYPE(SCHEME_TYPE(args[0]), scheme_place_type)) {
ch = (Scheme_Place_Bi_Channel *) ((Scheme_Place *) args[0])->channel;
}
else if (SAME_TYPE(SCHEME_TYPE(args[0]), scheme_place_bi_channel_type)) {
ch = (Scheme_Place_Bi_Channel *) args[0];
}
else {
ch = NULL;
scheme_wrong_type("place-channel-send", "place-channel", 0, argc, args);
}
{
void *msg_memory = NULL;
mso = scheme_places_serialize(args[1], &msg_memory);
scheme_place_async_send((Scheme_Place_Async_Channel *) ch->sendch, mso, msg_memory);
}
}
else {
scheme_wrong_count_m("place-channel-send", 2, 2, argc, args, 0);
}
return scheme_true;
}
static void scheme_place_async_send(Scheme_Place_Async_Channel *ch, Scheme_Object *uo) {
void *msg_memory = NULL;
Scheme_Object *o;
int cnt;
o = scheme_places_serialize(uo, &msg_memory);
mzrt_mutex_lock(ch->lock);
{
cnt = ch->count;
if (ch->count == ch->size) { /* GROW QUEUE */
Scheme_Object **new_msgs;
void **new_msg_memory;
new_msgs = GC_master_malloc(sizeof(Scheme_Object*) * ch->size * 2);
new_msg_memory = GC_master_malloc(sizeof(void*) * ch->size * 2);
if (ch->out < ch->in) {
memcpy(new_msgs, ch->msgs + ch->out, sizeof(Scheme_Object *) * (ch->in - ch->out));
memcpy(new_msg_memory, ch->msg_memory + ch->out, sizeof(void*) * (ch->in - ch->out));
}
else {
int s1 = (ch->size - ch->out);
memcpy(new_msgs, ch->msgs + ch->out, sizeof(Scheme_Object *) * s1);
memcpy(new_msgs + s1, ch->msgs, sizeof(Scheme_Object *) * ch->in);
memcpy(new_msg_memory, ch->msg_memory + ch->out, sizeof(void*) * s1);
memcpy(new_msg_memory + s1, ch->msg_memory, sizeof(void*) * ch->in);
}
ch->msgs = new_msgs;
ch->msg_memory = new_msg_memory;
ch->in = ch->size;
ch->out = 0;
ch->size *= 2;
}
ch->msgs[ch->in] = o;
ch->msg_memory[ch->in] = msg_memory;
++ch->count;
ch->in = (++ch->in % ch->size);
}
mzrt_mutex_unlock(ch->lock);
if (!cnt && ch->wakeup_signal) {
/*wake up possibly sleeping receiver */
scheme_signal_received_at(ch->wakeup_signal);
}
}
