SignalScope.hpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
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00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
00026 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
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00030 *******************************************************************************/
00031 
00032 
00037 #ifndef BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
00038 #define BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
00039 #include "blocxx/BLOCXX_config.h"
00040 #include <signal.h>
00041 
00042 // The classes and functions defined in this file are not meant for general
00043 // use, they are internal implementation details.  They may change at any time.
00044 
00045 namespace BLOCXX_NAMESPACE
00046 {
00047 
00048 const int BLOCXX_SIGSEGV = SIGSEGV;
00049 const int BLOCXX_SIGABRT = SIGABRT;
00050 #ifdef SIGBUS // NetWare doesn't have this signal
00051 const int BLOCXX_SIGBUS = SIGBUS;
00052 #endif
00053 const int BLOCXX_SIGFPE = SIGFPE;
00054 
00055 extern "C" {
00056 typedef void (*sighandler_t)(int);
00057 }
00058 
00059 class BLOCXX_COMMON_API SignalScope
00060 {
00061 public:
00062    SignalScope( int sig, sighandler_t handler )
00063          : m_sig( sig )
00064    {
00065 #ifndef BLOCXX_WIN32
00066       struct sigaction saNew;
00067       saNew.sa_handler = handler;
00068       sigemptyset(&saNew.sa_mask);
00069       saNew.sa_flags = 0;
00070       sigaction(m_sig, &saNew, &m_oldHandler);
00071 #endif
00072    }
00073    ~SignalScope()
00074    {
00075 #ifndef BLOCXX_WIN32
00076       sigaction(m_sig, &m_oldHandler, 0);
00077 #endif
00078    }
00079 private:
00080    SignalScope(const SignalScope&);
00081    const SignalScope& operator=(const SignalScope&);
00082    int m_sig;
00083 #ifndef BLOCXX_WIN32
00084    struct sigaction m_oldHandler;
00085 #endif
00086 };
00087 
00088 } // end namespace BLOCXX_NAMESPACE
00089 
00090 #endif

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