Example 1
Author: Ambreen Ilyas

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//// This example is from the ACE Programmers Guide.
//// Chapter: "The Reactor" (Event Management)
//// For details please see the guide at
//// http://www.cs.wustl.edu/~schmidt/ACE.html
//// AUTHOR: Umar Syyid (usyyid@hns.com)
//// and Ambreen Ilyas (ambreen@bitsmart.com)
/////////////////////////////////////////////////////////////////////////////////////////////////////////////

//Example 1
#include <signal.h>
#include "ace/Reactor.h"
#include "ace/Event_Handler.h"

//Create our subclass to handle the signal events
//that we wish to handle. Since we know that this particular
//event handler is going to be using signals we only overload the
//handle_signal method.

class
MyEventHandler: public ACE_Event_Handler{
int
handle_signal(int signum, siginfo_t*,ucontext_t*){
switch(signum){
case SIGWINCH:
ACE_DEBUG((LM_DEBUG, "You pressed SIGWINCH \n"));
break;

case SIGINT:
ACE_DEBUG((LM_DEBUG, "You pressed SIGINT \n"));
break;
}
return 0;
}
};

int main(int argc, char *argv[]){
//instantiate the handler
MyEventHandler *eh =new MyEventHandler;

//Register the handler asking to call back when either SIGWINCH
//or SIGINT signals occur. Note that in both the cases we asked the
//Reactor to call back the same Event_Handler i.e., MyEventHandler.
//This is the reason why we had to write a switch statement in the handle_signal()
//method above. Also note that the
//ACE_Reactor is being used as a Singleton object (Singleton pattern)

ACE_Reactor::instance()->register_handler(SIGWINCH,eh);
ACE_Reactor::instance()->register_handler(SIGINT,eh);
while(1)
//Start the reactors event loop
ACE_Reactor::instance()->handle_events();
}

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