ev_set_loop_release_cb with class member functions.

[Horacio Sanson]

I am trying to make my server class threaded following the thread example in the
libev documentation. Unfortunately I am having some problems converting the C to
C++ especially with the ev_set_loop_release_cb call.

Small test program:

#define EV_STANDALONE 1
#define EV_FEATURES 8
#define EV_USE_EPOLL 1
#define EV_PREPARE_ENABLE 1
#define EV_IDLE_ENABLE 1
#define EV_SIGNAL_ENABLE 1
#define EV_CHILD_ENABLE 1
#define EV_USE_STDEXCEPT 0
//#define EV_CONFIG_H <config.h>
#include <ev++.h>
#include "ev.c"

#include <pthread.h>

class Server
{
  private:
    void lock(EV_P) {
      pthread_mutex_lock(&mutex);
    }

    void unlock(EV_P) {
      pthread_mutex_unlock(&mutex);
    }

    pthread_mutex_t mutex;

    struct ev_loop *m_loop;

  public:
    Server() {

      pthread_mutex_init(&mutex, NULL);

      m_loop = ev_default_loop(0);

      ev_set_loop_release_cb(m_loop, &Server::lock, &Server::unlock);
    }

    void start() {
      lock(m_loop);
      pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
      ev_loop(m_loop, 0);
      unlock(m_loop);
    }
}


int main(int argc, char **argv)
{
  Server server;
  server.start();
}


Compilation of this sample results in the following error:

g++ -I./libev-3.9 -o libevtest libevtest.cpp
libevtest.cpp: In constructor ‘Server::Server()’:
libevtest.cpp:37: error: cannot convert ‘void (Server::*)(ev_loop*)’ to ‘void
(*)(ev_loop*)’ for argument ‘2’ to ‘void ev_set_loop_release_cb(ev_loop*, void
(*)(ev_loop*), void (*)(ev_loop*))’
libevtest.cpp: At global scope:
libevtest.cpp:15: error: new types may not be defined in a return type
libevtest.cpp:15: note: (perhaps a semicolon is missing after the definition of
‘Server’)
libevtest.cpp:49: error: two or more data types in declaration of ‘main’

-- 
regards,
Horacio Sanson