11 #define BACKLOG_SIZE 1048576
12 #define EPOLL_MAX_EVENTS 8192
13 #define EPOLL_TIMEOUT_MS 20
14 #define MAX_CLIENT_REQUEST 16384
17 class CubemapStateProto;
24 // Serialization/deserialization.
25 Client(const ClientProto &serialized);
26 ClientProto serialize() const;
28 // The file descriptor associated with this socket.
31 enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA };
34 // The HTTP request, as sent by the client. If we are in READING_REQUEST,
35 // this might not be finished.
38 // What stream we're connecting to; parsed from <request>.
39 // Not relevant for READING_REQUEST.
40 std::string stream_id;
42 // The header we want to send. This is nominally a copy of Stream::header,
43 // but since that might change on reconnects etc., we keep a local copy here.
44 // Only relevant for SENDING_HEADER; blank otherwise.
47 // Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
48 size_t header_bytes_sent;
50 // Number of bytes we've sent of data. Only relevant for SENDING_DATA.
55 Stream(const std::string &stream_id);
58 // Serialization/deserialization.
59 Stream(const StreamProto &serialized);
60 StreamProto serialize() const;
62 std::string stream_id;
64 // The HTTP response header, plus the video stream header (if any).
67 // The stream data itself, stored in a circular buffer.
70 // How many bytes <data> contains. Can very well be larger than BACKLOG_SIZE,
71 // since the buffer wraps.
75 Stream(const Stream& other);
83 // Start a new thread that handles clients.
89 CubemapStateProto serialize() const;
91 void add_client(int sock);
92 void add_client_from_serialized(const ClientProto &client);
94 void add_stream(const std::string &stream_id);
95 void add_stream_from_serialized(const StreamProto &stream);
97 void set_header(const std::string &stream_id, const std::string &header);
98 void add_data(const std::string &stream_id, const char *data, size_t bytes);
101 pthread_t worker_thread;
103 // All variables below this line are protected by the mutex.
104 pthread_mutex_t mutex;
106 // If the thread should stop or not.
109 // Map from stream ID to stream.
110 std::map<std::string, Stream *> streams;
112 // Map from file descriptor to client.
113 std::map<int, Client> clients;
115 // Used for epoll implementation (obviously).
117 epoll_event events[EPOLL_MAX_EVENTS];
119 // Clients that are in SENDING_DATA, but that we don't listen on,
120 // because we currently don't have any data for them.
121 // See put_client_to_sleep() and wake_up_all_clients().
122 std::vector<int> sleeping_clients;
124 // Recover the this pointer, and call do_work().
125 static void *do_work_thunk(void *arg);
127 // The actual worker thread.
130 void process_client(Client *client);
132 // Close a given client socket, and clean up after it.
133 void close_client(Client *client);
135 // Parse the HTTP request.
136 void parse_request(Client *client);
138 // Construct the HTTP header, and set the client into
139 // the SENDING_HEADER state.
140 void construct_header(Client *client);
142 // Put client to sleep, since there is no more data for it; we will on
143 // longer listen on POLLOUT until we get more data. Also, it will be put
144 // in the list of clients to wake up when we do.
145 void put_client_to_sleep(Client *client);
147 // We have more data, so mark all clients that are sleeping as ready to go.
148 void wake_up_all_clients();
150 // TODO: This function should probably die.
151 Stream *find_stream(const std::string &stream_id);
154 #endif // !defined(_SERVER_H)