Implement sleeping/waking clients.

[cubemap] / server.cpp

diff --git a/server.cpp b/server.cpp
index d6b5b5b8b783446ce08e87972b34430b9bf4e547..b914b2ec4fbaa50175021038e42ed9161cd21bad 100644 (file)
--- a/server.cpp
+++ b/server.cpp
@@ -107,7 +107,26 @@ void Server::set_header(const string &stream_id, const string &header)
        
 void Server::add_data(const string &stream_id, const char *data, size_t bytes)
 {
-       // TODO
+       if (bytes == 0) {
+               return;
+       }
+
+       MutexLock lock(&mutex);
+       assert(streams.count(stream_id) != 0);
+       Stream *stream = &streams[stream_id];
+       size_t pos = stream->data_size % BACKLOG_SIZE;
+       stream->data_size += bytes;
+
+       if (pos + bytes > BACKLOG_SIZE) {
+               size_t to_copy = BACKLOG_SIZE - pos;
+               memcpy(stream->data + pos, data, to_copy);
+               data += to_copy;
+               bytes -= to_copy;
+               pos = 0;
+       }
+
+       memcpy(stream->data + pos, data, bytes);
+       wake_up_all_clients();
 }
        
 void Server::process_client(Client *client)
@@ -215,7 +234,12 @@ void Server::process_client(Client *client)
                        close_client(client);
                        return;
                }
-               client->bytes_sent += ret;      
+               client->bytes_sent += ret;
+
+               if (client->bytes_sent == stream.data_size) {
+                       // We don't have any more data for this client, so put it to sleep.
+                       put_client_to_sleep(client);
+               }
                break;
        }
        default:
@@ -257,3 +281,31 @@ void Server::close_client(Client *client)
        close(client->sock);
        clients.erase(client->sock);
 }
+       
+void Server::put_client_to_sleep(Client *client)
+{
+       epoll_event ev;
+       ev.events = EPOLLRDHUP;
+       ev.data.fd = client->sock;
+
+       if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
+               perror("epoll_ctl(EPOLL_CTL_MOD)");
+               exit(1);
+       }
+
+       sleeping_clients.push_back(client->sock);
+}
+
+void Server::wake_up_all_clients()
+{
+       for (unsigned i = 0; i < sleeping_clients.size(); ++i) {
+               epoll_event ev;
+               ev.events = EPOLLOUT | EPOLLRDHUP;
+               ev.data.fd = sleeping_clients[i];
+               if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, sleeping_clients[i], &ev) == -1) {
+                       perror("epoll_ctl(EPOLL_CTL_MOD)");
+                       exit(1);
+               }
+       }
+       sleeping_clients.clear();
+}