#include <vector>
#include <string>
#include <map>
+#include <algorithm>
#include "metacube.h"
#include "server.h"
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)
}
// See if we need to split across the circular buffer.
- int ret;
+ ssize_t ret;
if ((client->bytes_sent % BACKLOG_SIZE) + bytes_to_send > BACKLOG_SIZE) {
- // TODO: writev
- assert(false);
+ size_t bytes_first_part = BACKLOG_SIZE - (client->bytes_sent % BACKLOG_SIZE);
+
+ iovec iov[2];
+ iov[0].iov_base = const_cast<char *>(stream.data + (client->bytes_sent % BACKLOG_SIZE));
+ iov[0].iov_len = bytes_first_part;
+
+ iov[1].iov_base = const_cast<char *>(stream.data);
+ iov[1].iov_len = bytes_to_send - bytes_first_part;
+
+ ret = writev(client->sock, iov, 2);
} else {
ret = write(client->sock,
stream.data + (client->bytes_sent % BACKLOG_SIZE),
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:
- // TODO
assert(false);
}
}
perror("epoll_ctl(EPOLL_CTL_DEL)");
exit(1);
}
+
+ // This client could be sleeping, so we'll need to fix that. (Argh, O(n).)
+ vector<int>::iterator new_end =
+ remove(sleeping_clients.begin(), sleeping_clients.end(), client->sock);
+ sleeping_clients.erase(new_end, sleeping_clients.end());
// Bye-bye!
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();
+}