21 #define EPOLL_MAX_EVENTS 8192
22 #define MAX_CLIENT_REQUEST 16384
24 class CubemapStateProto;
28 class Server : public Thread {
33 // Get the list of all currently connected clients.
34 std::vector<ClientStats> get_client_stats() const;
36 // Set header (both HTTP header and any stream headers) for the given stream.
37 void set_header(const std::string &stream_id,
38 const std::string &http_header,
39 const std::string &stream_header);
41 // Set that the given stream should use the given mark pool from now on.
42 // NOTE: This should be set before any clients are connected!
43 void set_mark_pool(const std::string &stream_id, MarkPool *mark_pool);
45 // These will be deferred until the next time an iteration in do_work() happens,
46 // and the order between them are undefined.
47 // XXX: header should ideally be ordered with respect to data.
48 void add_client_deferred(int sock);
49 void add_data_deferred(const std::string &stream_id, const char *data, size_t bytes);
51 // These should not be called while running, since that would violate
52 // threading assumptions (ie., that epoll is only called from one thread
54 CubemapStateProto serialize();
55 void add_client_from_serialized(const ClientProto &client);
56 void add_stream(const std::string &stream_id, size_t bytes_received, Stream::Encoding encoding);
57 void add_stream_from_serialized(const StreamProto &stream, int data_fd);
58 void set_backlog_size(const std::string &stream_id, size_t new_size);
59 void set_encoding(const std::string &stream_id, Stream::Encoding encoding);
62 // Mutex protecting queued_data only. Note that if you want to hold both this
63 // and <mutex> below, you will need to take <mutex> before this one.
64 mutable pthread_mutex_t queued_data_mutex;
66 // Deferred commands that should be run from the do_work() thread as soon as possible.
67 // We defer these for two reasons:
69 // - We only want to fiddle with epoll from one thread at any given time,
70 // and doing add_client() from the acceptor thread would violate that.
71 // - We don't want the input thread(s) hanging on <mutex> when doing
72 // add_data(), since they want to do add_data() rather often, and <mutex>
73 // can be taken a lot of the time.
75 // Protected by <queued_data_mutex>.
76 std::vector<int> queued_add_clients;
77 std::map<std::string, std::string> queued_data;
79 // All variables below this line are protected by the mutex.
80 mutable pthread_mutex_t mutex;
82 // Map from stream ID to stream.
83 std::map<std::string, Stream *> streams;
85 // Map from file descriptor to client.
86 std::map<int, Client> clients;
88 // Used for epoll implementation (obviously).
90 epoll_event events[EPOLL_MAX_EVENTS];
92 // The actual worker thread.
93 virtual void do_work();
95 // Process a client; read and write data as far as we can.
96 // After this call, one of these four is true:
98 // 1. The socket is closed, and the client deleted.
99 // 2. We are still waiting for more data from the client.
100 // 3. We've sent all the data we have to the client,
101 // and put it in <sleeping_clients>.
102 // 4. The socket buffer is full (which means we still have
103 // data outstanding).
105 // For #2, we listen for EPOLLIN events. For #3 and #4, we listen
106 // for EPOLLOUT in edge-triggered mode; it will never fire for #3,
107 // but it's cheaper than taking it in and out all the time.
108 void process_client(Client *client);
110 // Close a given client socket, and clean up after it.
111 void close_client(Client *client);
113 // Parse the HTTP request. Returns a HTTP status code (200/400/404).
114 int parse_request(Client *client);
116 // Construct the HTTP header, and set the client into
117 // the SENDING_HEADER state.
118 void construct_header(Client *client);
120 // Construct a generic error with the given line, and set the client into
121 // the SENDING_ERROR state.
122 void construct_error(Client *client, int error_code);
124 // TODO: This function should probably die.
125 Stream *find_stream(const std::string &stream_id);
127 void process_queued_data();
129 void add_client(int sock);
132 #endif // !defined(_SERVER_H)