int
skynet_multicast_castgroup(struct skynet_context * from, struct skynet_multicast_group * group, struct skynet_multicast_message *msg) {
combine_queue(from, group);
if (group->number == 0) {
skynet_multicast_dispatch(msg, NULL, NULL);
return 0;
}
uint32_t source = skynet_context_handle(from);
skynet_multicast_copy(msg, group->number);
int i;
int release = 0;
for (i=0;i<group->number;i++) {
struct pair * p = &group->data[i];
skynet_context_send(p->ctx, msg, 0 , source, PTYPE_MULTICAST , 0);
int ref = skynet_context_ref(p->ctx);
if (ref == 1) {
skynet_context_release(p->ctx);
struct skynet_context * ctx = skynet_handle_grab(p->handle);
if (ctx == NULL) {
p->ctx = NULL;
skynet_multicast_leavegroup(group, p->handle);
++release;
}
}
}
return group->number - release;
}
static int
_drop_queue(struct message_queue *q) {
// todo: send message back to message source
struct skynet_message msg;
int s = 0;
while(!skynet_mq_pop(q, &msg)) {
++s;
int type = msg.sz >> HANDLE_REMOTE_SHIFT;
if (type == PTYPE_MULTICAST) {
assert((msg.sz & HANDLE_MASK) == 0);
skynet_multicast_dispatch((struct skynet_multicast_message *)msg.data, NULL, NULL);
} else {
free(msg.data);
}
}
_release(q);
return s;
}
