+// Locks a pthread mutex, RAII-style.
+class MutexLock {
+public:
+ MutexLock(pthread_mutex_t *mutex);
+ ~MutexLock();
+
+private:
+ pthread_mutex_t *mutex;
+};
+
+MutexLock::MutexLock(pthread_mutex_t *mutex)
+ : mutex(mutex)
+{
+ pthread_mutex_lock(mutex);
+}
+
+MutexLock::~MutexLock()
+{
+ pthread_mutex_unlock(mutex);
+}
+
+struct Client {
+ enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA };
+ State state;
+
+ // The HTTP request, as sent by the client. If we are in READING_REQUEST,
+ // this might not be finished.
+ string client_request;
+
+#if 0
+ // What stream we're connecting to; parsed from client_request.
+ // Not relevant for READING_REQUEST.
+ string stream_id;
+#endif
+
+ // Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
+ size_t header_bytes_sent;
+
+ // Number of bytes we've sent of data. Only relevant for SENDING_DATA.
+ size_t bytes_sent;
+};
+
+struct Stream {
+ // The HTTP response header, plus the video stream header (if any).
+ string header;
+
+ // The stream data itself, stored in a circular buffer.
+ char data[BACKLOG_SIZE];
+
+ // How many bytes <data> contains. Can very well be larger than BACKLOG_SIZE,
+ // since the buffer wraps.
+ size_t data_size;
+};
+
+class Server {
+public:
+ Server();
+
+ // Start a new thread that handles clients.
+ void run();
+ void add_socket(int server_sock);
+ void add_stream(const string &stream_id);
+ void set_header(const string &stream_id, const string &header);
+ void add_data(const string &stream_id, const char *data, size_t bytes);
+
+private:
+ pthread_mutex_t mutex;
+ map<string, Stream> streams;
+
+ // Recover the this pointer, and call do_work().
+ static void *do_work_thunk(void *arg);
+
+ // The actual worker thread.
+ void do_work();
+};
+
+Server::Server()
+{
+ pthread_mutex_init(&mutex, NULL);
+}
+
+void Server::run()
+{
+ pthread_t thread;
+ pthread_create(&thread, NULL, Server::do_work_thunk, this);
+}
+
+void *Server::do_work_thunk(void *arg)
+{
+ Server *server = static_cast<Server *>(arg);
+ server->do_work();
+ return NULL;
+}
+
+void Server::do_work()
+{
+ for ( ;; ) {
+ printf("server thread running\n");
+ sleep(1);
+ }
+}
+