10 #define BACKLOG_SIZE 1048576
11 #define EPOLL_MAX_EVENTS 8192
12 #define EPOLL_TIMEOUT_MS 20
13 #define MAX_CLIENT_REQUEST 16384
16 // The file descriptor associated with this socket.
19 enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA };
22 // The HTTP request, as sent by the client. If we are in READING_REQUEST,
23 // this might not be finished.
24 std::string client_request;
26 // What stream we're connecting to; parsed from client_request.
27 // Not relevant for READING_REQUEST.
28 std::string stream_id;
30 // The header we want to send. This is nominally a copy of Stream::header,
31 // but since that might change on reconnects etc., we keep a local copy here.
32 // Only relevant for SENDING_HEADER; blank otherwise.
35 // Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
36 size_t header_bytes_sent;
38 // Number of bytes we've sent of data. Only relevant for SENDING_DATA.
43 // The HTTP response header, plus the video stream header (if any).
46 // The stream data itself, stored in a circular buffer.
47 char data[BACKLOG_SIZE];
49 // How many bytes <data> contains. Can very well be larger than BACKLOG_SIZE,
50 // since the buffer wraps.
58 // Start a new thread that handles clients.
60 void add_client(int sock);
61 void add_stream(const std::string &stream_id);
62 void set_header(const std::string &stream_id, const std::string &header);
63 void add_data(const std::string &stream_id, const char *data, size_t bytes);
66 void process_client(Client *client);
68 // Close a given client socket, and clean up after it.
69 void close_client(Client *client);
71 // Parse the HTTP request, construct the header, and set the client into
72 // the SENDING_HEADER state.
73 void parse_request(Client *client);
75 pthread_mutex_t mutex;
77 // Map from stream ID to stream.
78 std::map<std::string, Stream> streams;
80 // Map from file descriptor to client.
81 std::map<int, Client> clients;
83 // Used for epoll implementation (obviously).
85 epoll_event events[EPOLL_MAX_EVENTS];
87 // Recover the this pointer, and call do_work().
88 static void *do_work_thunk(void *arg);
90 // The actual worker thread.
94 #endif // !defined(_SERVER_H)