How to pass non-static method to signal() function?

Hi all,
I'm trying to call a non-static method when SIGALRM is received. Since it's non-static I can't just call the method, I need to qualify it. However then it's not a void* it's a void (class*).

This is my class, the method in question, and the only variable concerned:

Code:

---

class RemoraServer : public CommonApplication
{
 ....................
  public:
.......................
      void CatchAlarm(int signo)
      {
        if (signo == SIGALRM)
        {
            timeToSendEmail = TRUE;
        } //end if
      } //end CatchAlarm(...)
..............
  private:
     
      Boolean  timeToSendEmail;  //should we send our QA email yet?
     
}; // end class RemoraServer



RemoraServer::RemoraServer()
  : CommonApplication("/nerr/remora/.RemoraServer.debug", "SERVER"),
    dataListenSocket(-1),
    dataServerSocket(-1),
    defaultDataPort(11428),
    myProtocol("tcp"),
    numberOfHosts(0),
    repositoryURI("/pages/ProcessRemoteData.php"),
    repositoryURL("www.nerrenvirons.org"),
    repositoryPort(80),
    myConfigFile("/nerr/remora/host.config"),
    CDMODataString(""),
    CDMOCmdsCollectedSoFar(0),
    CDMOMaxCmdsPerDataString(50), //start out small for experimentation
    amITheCDMO(FALSE),
    CDMOSocket(-1),
    numberOfFailedAttempts(0),
    numberOfChildren(0),
    timeToSendEmail(FALSE)
{
  //setup our signal handlers
 
......................
 
  if (signal(SIGALRM, &RemoraServer::CatchAlarm) == SIG_ERR)
  {
      //this is us telling ourselves it's time to send an email
      ;
  } //end if ALARM

} //RemoraServer::RemoraServer()

---

and this is the error I'm getting:

cannot convert 'void (RemoraServer::*)(int) to 'void (*)(int)' for argument '2' to 'void (* signal(int, void (*)(int)))(int)


I don't want to make the method static, because each object can send emails at different times.

Any ideas?

Okay, rather than make it static what I tried to do is make a global pointer to my object, then a global function that could be used as the wrapper to the callback. However that's not working either and I don't know why.

This is what I've got now:

Code:

---


main.cc:

RemoraServer *ServerList;
void WrapperSignalHandler()
{
  ServerList->CatchAlarm();
}

int main(int argc, char *argv[], char *envp[])
{
  MakeMyselfaDaemon();

  RemoraServer    *server = NULL;

  ServerList = server;
 
  //we could put a loop here, so if Run ever finishes we just create a new one.......
  server = new RemoraServer();

  server->Init();

  server->Run();

  delete server;

  return (0);

} //end main(...)



RemoraServer.h:
...........
extern void WrapperSignalHandler();
...........


RemoraServer.cc:

RemoraServer::RemoraServer()
  : CommonApplication("/nerr/remora/.RemoraServer.debug", "SERVER"),
    ....................
{
  //setup our signal handlers
  ..............................
  //CatchAlarm is not and must not be static!
  if (signal(SIGALRM, WrapperSignalHandler) == SIG_ERR)
  {
      //this is us telling ourselves it's time to send an email
      ;
  } //end if ALARM

} //RemoraServer::RemoraServer()

---

and the complaint I get is when I call signal() in the constructor:

invalid conversion from 'void (*)()' to void(*)(int)'

??

WrapperSignalHandler needs to have an int parameter.

gg

Oops....thanks. :)