blocxx

SignalScope.hpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2005, Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2006, 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 *     * Redistributions in binary form must reproduce the above copyright
00011 *       notice, this list of conditions and the following disclaimer in the
00012 *       documentation and/or other materials provided with the distribution.
00013 *     * Neither the name of 
00014 *       Vintela, Inc., 
00015 *       nor Novell, Inc., 
00016 *       nor the names of its contributors or employees may be used to 
00017 *       endorse or promote products derived from this software without 
00018 *       specific prior written permission.
00019 * 
00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00030 * POSSIBILITY OF SUCH DAMAGE.
00031 *******************************************************************************/
00032 
00033 
00038 #ifndef BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
00039 #define BLOCXX_SIGNALSCOPE_HPP_INCLUDE_GUARD_
00040 #include "blocxx/BLOCXX_config.h"
00041 #include <signal.h>
00042 
00043 #ifdef BLOCXX_NCR
00044 #undef SIG_IGN
00045 #define  SIG_IGN  (void (*)())1
00046 #endif
00047 
00048 // The classes and functions defined in this file are not meant for general
00049 // use, they are internal implementation details.  They may change at any time.
00050 
00051 namespace BLOCXX_NAMESPACE
00052 {
00053 
00054 const int BLOCXX_SIGSEGV = SIGSEGV;
00055 const int BLOCXX_SIGABRT = SIGABRT;
00056 #ifdef SIGBUS // NetWare doesn't have this signal
00057 const int BLOCXX_SIGBUS = SIGBUS;
00058 #endif
00059 const int BLOCXX_SIGFPE = SIGFPE;
00060 
00061 extern "C" {
00062 #ifdef BLOCXX_NCR
00063 typedef void (*sighandler_t)(void);
00064 #else
00065 typedef void (*sighandler_t)(int);
00066 #endif
00067 }
00068 
00069 class BLOCXX_COMMON_API SignalScope
00070 {
00071 public:
00072    SignalScope( int sig, sighandler_t handler )
00073          : m_sig( sig )
00074    {
00075 #ifndef BLOCXX_WIN32
00076       struct sigaction saNew;
00077       saNew.sa_handler = handler;
00078       sigemptyset(&saNew.sa_mask);
00079       saNew.sa_flags = 0;
00080       sigaction(m_sig, &saNew, &m_oldHandler);
00081 #endif
00082    }
00083    ~SignalScope()
00084    {
00085 #ifndef BLOCXX_WIN32
00086       sigaction(m_sig, &m_oldHandler, 0);
00087 #endif
00088    }
00089 private:
00090    SignalScope(const SignalScope&);
00091    const SignalScope& operator=(const SignalScope&);
00092    int m_sig;
00093 #ifndef BLOCXX_WIN32
00094    struct sigaction m_oldHandler;
00095 #endif
00096 };
00097 
00098 } // end namespace BLOCXX_NAMESPACE
00099 
00100 #endif