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#include <stdio.h>
#include "crashhandler.h"

int main()
{
  try_exec {
    int* p = 0;
    ++(*p);
  }
  on_crash {
    printf( "It crashed!" );
  }
  printf( " ... but we still alive\n" );
  return 0;
}

///////////////////////////////////////////////////////////////////////////////
///
/// @file crashhandler.h
///
/// @brief Cross-platform implementation try/except statements for crash handling
///
/// @author Sergeich ( 2sergeich <at> gmail <dot> com )
///
///////////////////////////////////////////////////////////////////////////////

#ifndef CRASH_HANDLER_H
#define CRASH_HANDLER_H

#include <QtGlobal>

#ifdef Q_OS_UNIX

#include <setjmp.h>
#include <signal.h>

///////////////////////////////////////////////////////////////////////////////

typedef void (* SignalHandlerFunc) (int);

class SigactionWrap
{
public:
	SigactionWrap( int signum, SignalHandlerFunc handler ) : sig_num(signum)
	{
		new_action.sa_handler = handler;
		sigemptyset(&new_action.sa_mask);
		new_action.sa_flags = 0;
		sigaction (signum, &new_action, &old_action);
	}

	~SigactionWrap()
	{
		sigaction (sig_num, &old_action, 0);
	}

private:
	struct sigaction new_action, old_action;
	int sig_num;
};

///////////////////////////////////////////////////////////////////////////////

static sigjmp_buf sigjmp_env;
static void crashHandler( int )
{
		siglongjmp (sigjmp_env, 1);
}

#define try_exec \
	SigactionWrap segvAct( SIGSEGV, crashHandler ); \
	SigactionWrap  busAct( SIGBUS,  crashHandler ); \
	SigactionWrap  illAct( SIGILL,  crashHandler ); \
	SigactionWrap abrtAct( SIGABRT, crashHandler ); \
	if ( sigsetjmp( sigjmp_env, 1 ) == 0 )

#define on_crash

#endif // Q_OS_UNIX

///////////////////////////////////////////////////////////////////////////////

#ifdef Q_OS_WIN32

#include <Windows.h>

#define try_exec __try
#define on_crash __except( EXCEPTION_EXECUTE_HANDLER )

#endif // Q_OS_WIN32


#endif // CRASH_HANDLER_H