c++ - Websocket++ websocket server class member function not recognised from ISR -

i'm using odroid (raspi-like arm board) run small spi-based radio chip sends data to, among other things, websocket. applied using websocket++: https://github.com/zaphoyd/websocketpp. i've bastardised 1 of simple examples, sends server message clients. program has count_server class handles websocket, has isr handled wiringpi calls nested functions handle different operations.

the issue i've got in order send message, sending function must in count_server class far can tell, access client addresses etc. class method not accesible inside isr, handles data received radio, when try send websocket message inside isr error:

error: 'websocketserver' not declared in scope websocketserver.sendlivedata(); 

the websocketserver instance of class count_server, instantiated in main(). why can't isr 'see' websocketserver class.

one workaround poll inside count() function, blocks cpu , i'd rather leave ready perform other tasks.]

here's simplest example produce. requires websocket++ , wiringpi attachinterrupt.

#include <cstdlib> #include <unistd.h> #include <iostream> #include <sstream> #include <string> #include <rf24/rf24.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <time.h>  //websocket++ includes #include <mutex> #include <set> #include <thread>  #include <websocketpp/config/asio_no_tls.hpp> #include <websocketpp/server.hpp> //*/   //websocket++ declarations  typedef websocketpp::server<websocketpp::config::asio> server;  using websocketpp::connection_hdl; using websocketpp::lib::placeholders::_1;  class count_server { public:     count_server() : m_count(0) {         m_server.init_asio();          m_server.set_open_handler(bind(&count_server::on_open,this,_1));         m_server.set_close_handler(bind(&count_server::on_close,this,_1));     }      void on_open(connection_hdl hdl) {         std::lock_guard<std::mutex> lock(m_mutex);         m_connections.insert(hdl);     }      void on_close(connection_hdl hdl) {         std::lock_guard<std::mutex> lock(m_mutex);         m_connections.erase(hdl);     }          void sendlivedata(){         std::stringstream ss;         ss << "foobar";         (auto : m_connections) {                  m_server.send(it,ss.str(),websocketpp::frame::opcode::text);             }      }      void count() {//simple loop thread, not needed, in working example lef t time being         while (1) {             sleep(1000);                 }         }     void run(uint16_t port) {         m_server.listen(port);         m_server.start_accept();         m_server.run();     } private:     typedef std::set<connection_hdl,std::owner_less<connection_hdl>> con_list;      int m_count;     server m_server;     con_list m_connections;     std::mutex m_mutex; };  /****************** raspberry pi ***********************/   int interruptpin = 6; // gpio pin interrupts - interrupts have been edited handled //by wiringpi, #6 used, not #103, check rf24/utility/spidev/interrupt.c info int i=0; /**************************************************************/  void addlivedata(){ //live data buffer handler + calls sending function when buffer hits max websocketserver.sendlivedata(); }  void inthandler(){//when radio chip irq goes low, happened, handles                 addlivedata();//recvd = 2;//flag data live data }  int main(){      attachinterrupt(interruptpin, int_edge_falling, &inthandler); //attach interrupt bcm p in 23     count_server websocketserver;     std::thread t(std::bind(&count_server::count,&websocketserver));     websocketserver.sendlivedata();     websocketserver.run(8080); } '