SignalScope.hpp

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* Copyright (C) 2005, Vintela, Inc. All rights reserved.
* Copyright (C) 2006, Novell, Inc. All rights reserved.
* 
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* modification, are permitted provided that the following conditions are met:
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*       this list of conditions and the following disclaimer.
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#ifndef BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
#define BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
#include "blocxx/BLOCXX_config.h"
#include <signal.h>
 
#ifdef BLOCXX_NCR
#undef SIG_IGN
#define  SIG_IGN  (void (*)())1
#endif
 
// The classes and functions defined in this file are not meant for general
// use, they are internal implementation details.  They may change at any time.
 
namespace BLOCXX_NAMESPACE
{
 
const int BLOCXX_SIGSEGV = SIGSEGV;
const int BLOCXX_SIGABRT = SIGABRT;
#ifdef SIGBUS // NetWare doesn't have this signal
const int BLOCXX_SIGBUS = SIGBUS;
#endif
const int BLOCXX_SIGFPE = SIGFPE;
 
extern "C" {
#ifdef BLOCXX_NCR
typedef void (*sighandler_t)(void);
#else
typedef void (*sighandler_t)(int);
#endif
}
 
class BLOCXX_COMMON_API SignalScope
{
public:
   SignalScope( int sig, sighandler_t handler )
         : m_sig( sig )
   {
#ifndef BLOCXX_WIN32
      struct sigaction saNew;
      saNew.sa_handler = handler;
      sigemptyset(&saNew.sa_mask);
      saNew.sa_flags = 0;
      sigaction(m_sig, &saNew, &m_oldHandler);
#endif
   }
   ~SignalScope()
   {
#ifndef BLOCXX_WIN32
      sigaction(m_sig, &m_oldHandler, 0);
#endif
   }
private:
   SignalScope(const SignalScope&);
   const SignalScope& operator=(const SignalScope&);
   int m_sig;
#ifndef BLOCXX_WIN32
   struct sigaction m_oldHandler;
#endif
};
 
} // end namespace BLOCXX_NAMESPACE
 
#endif