al_Signal.hpp

#ifndef AL_SIGNAL_H
#define AL_SIGNAL_H
 
/*
 
Manages signals & interrupts
 
need to invoke
 
registerSigInt(this);
 
in onCreate
 
This will allow onExit to execute even when app is abruptly killed.
 
Kon Hyong Kim, 2019
konhyong@gmail.com
 
*/
 
#include <csignal>
#include "al/app/al_App.hpp"
 
namespace al {
 
static void* userApp;
void* getUser() { return userApp; }
 
static void userHandler(int s) {
  // printf("Caught signal %d\n", s);
  ((App*)getUser())->onExit();
  
  exit(1);
}
 
void registerSigInt(void* app) {
  userApp = app;
 
#ifdef _WIN32
  signal(SIGINT, userHandler);
  signal(SIGTERM, userHandler);
  signal(SIGABRT, userHandler);
#else
  struct sigaction sigIntHandler;
  sigIntHandler.sa_handler = userHandler;
  sigemptyset(&sigIntHandler.sa_mask);
  sigIntHandler.sa_flags = 0;
  sigaction(SIGINT, &sigIntHandler, NULL);
#endif
}
 
}  // namespace al
 
#endif